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Thread: Viscous Fan Clutch Replacement

  1. #361
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    Re: Viscous Fan Clutch Replacement

    Quote Originally Posted by jhodg5ck View Post
    oh yea.....Looooong gone.

  2. #362
    E500E Guru Melville's Avatar
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    Re: Viscous Fan Clutch Replacement

    Is there a consensus about the rate of properly calibrated Sachs/Horton units? Is it still common for new units to be defective out of the box?

  3. #363
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    Re: Viscous Fan Clutch Replacement

    Quote Originally Posted by Melville View Post
    Is there a consensus about the rate of properly calibrated Sachs/Horton units? Is it still common for new units to be defective out of the box?
    AFAIK - yes, it is still common for them to be mis-calibrated out of the box.


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    Re: Viscous Fan Clutch Replacement

    I have a new in box factory clutch, that I have not installed on my car. I intend to soon. I will let folks know how it is better than the unit that I have from a 50K mile 1992 500E that I installed in my car a couple of years back. It was a modest improvement over the original clutch that I had on my E500.

    I did install new clutches on my G320 (M104) and 560SEC (M117) over the past few years. The M104 unit was a factory clutch, and the M117 unit was OEM (Behr). Both worked perfectly out of the box, and cured cooling problems, but they are not the same as the M119 units....

    Cheers,
    Gerry

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  6. #365
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    Re: Viscous Fan Clutch Replacement

    I had a new Horton clutch installed about a month ago but haven't had a chance to test it. Today I had 8899 with me and, with him revving the car, I could definitely tell it was engaging and disengaging, and it was pushing a lot of air when engaged.

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  8. #366
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    Re: Viscous Fan Clutch Replacement

    Hi,

    I'm gonna need your help again. I finally found the time to do the job but I can't make the pulley holder tool you recommended work. It's imposible to put it in the water pump pulley and if you put it on any other, it holds the belt but the pulley slips around it. Any tips?
    Attached Images Attached Images
    Esteban

    1971 Seat 600E, 1981 Mercedes 300TD, 1984 Mercedes 300D, 1992 Mercedes 500E, 1995 Range Rover 4.6 HSE, 2005 Audi A4 2.5TDI Avant, 2007 Triumph Bonneville

  9. #367
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    Re: Viscous Fan Clutch Replacement

    What I use is a rag & G clamp. Wrap the rag around the pulley first then tighten a G clamp into it's edge. Then let the clamp rest against another pulley or bracket etc. (serpentine belt still in place if you need to clamp another pulley for space reasons) This always works for me and I think it has less risk of bending a pulley. Or a rubber strap wrench might have the same effect
    1987 w124 200 - 3.6 AMG build | 1990 w124 300E-24 | 1992 w124 500E

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  10. #368
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    Re: Viscous Fan Clutch Replacement

    Thanks, JC220! That makes sense, I'll try that.
    Esteban

    1971 Seat 600E, 1981 Mercedes 300TD, 1984 Mercedes 300D, 1992 Mercedes 500E, 1995 Range Rover 4.6 HSE, 2005 Audi A4 2.5TDI Avant, 2007 Triumph Bonneville

  11. #369
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    Re: Viscous Fan Clutch Replacement

    I thought the new Horton made clutches were more consistent than the Sachs production runs.

  12. #370
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    Re: Viscous Fan Clutch Replacement

    Guys is there any alternative to the meyle or graf water pumps? I have read bad things about both...

    Also is ACM the best fan clutch aside from the dealer's one?

    Thanks

  13. #371
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    Re: Viscous Fan Clutch Replacement

    I used a graf on my C126 replacement and it was a perfect fit and no issues for almost 6 years. I think its ACM or dealer...
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  14. #372
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    Re: Viscous Fan Clutch Replacement

    ACM is china. I like Dealer/OE water pumps in an ideal world. Graf is next, but we have had a few give us problems. Typically the problems are VERY quick to manifest, but doing the job 2X kinda sucks.


    OE Mercedes only on the fan clutch....tried ALL the aftermarket solutions here in the states, sent them all back at this point.

    jono
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  16. #373
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    Re: Viscous Fan Clutch Replacement

    Quote Originally Posted by samm View Post
    Guys is there any alternative to the meyle or graf water pumps? I have read bad things about both...

    Also is ACM the best fan clutch aside from the dealer's one?

    Thanks
    I fitted a Hepu brand pump in my 500E. Pictures and fitment details are from page 10 in my owner's thread. It was a good price and high quality - made in Germany item. (Be aware the part numbers in my thread are for the upgrade m119 pump - although I'm not really convinced it was an upgrade at all!)

    The factory fan clutch is ridiculously priced. I fitted a new Beru boxed ACM clutch and it's been very good too.
    1987 w124 200 - 3.6 AMG build | 1990 w124 300E-24 | 1992 w124 500E

    1994 320CE Sportline | 1997 w140 S280 | 2007 w211 E220CDI | 1994 220CE | 1996 w140 S320

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    Re: Viscous Fan Clutch Replacement

    Quote Originally Posted by samm View Post
    Guys is there any alternative to the meyle or graf water pumps? I have read bad things about both...

    Also is ACM the best fan clutch aside from the dealer's one?
    I'd spring for the OE/dealer rebuilt water pump. I'm suspicious of the $70 price on the Graf, and I don't trust the Meyle (at $100) any further than I could throw it. If I had to gamble I'd rather try Graf. ECS has a Geba unit which I'm not familiar with. The dealer pump is only $210 plus core charge from Naperville, free shipping:
    https://www.mboemparts.com/oem-parts...-119200150180/

    If you can still find an ACM clutch, that is the low-cost fix for the fan. I'm only seeing ACM at ECStuning and FCP, and the photos look different than the ACM I bought years ago:
    https://www.ecstuning.com/b-acm-part...192000122~acm/
    https://www.fcpeuro.com/products/mer...500-1192000122



  18. #375
    E500E Guru 500ESpain's Avatar
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    Re: Viscous Fan Clutch Replacement

    For information, I installed a Febi clutch. Car now only reaches 100C on city driving. It required the shorter bolt. The Sachs unit was brand new but defective. It says Horton on the back.
    Esteban

    1971 Seat 600E, 1981 Mercedes 300TD, 1984 Mercedes 300D, 1992 Mercedes 500E, 1995 Range Rover 4.6 HSE, 2005 Audi A4 2.5TDI Avant, 2007 Triumph Bonneville

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  20. #376
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    Re: Viscous Fan Clutch Replacement

    Febi is a reboxer- did it have a company name on the clutch?

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    Re: Viscous Fan Clutch Replacement

    Quote Originally Posted by samiam44 View Post
    Febi is a reboxer- did it have a company name on the clutch?
    Didn't see any. It's thinner than the Sachs for sure. Kind of ACM looking.
    Esteban

    1971 Seat 600E, 1981 Mercedes 300TD, 1984 Mercedes 300D, 1992 Mercedes 500E, 1995 Range Rover 4.6 HSE, 2005 Audi A4 2.5TDI Avant, 2007 Triumph Bonneville

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    Re: Viscous Fan Clutch Replacement

    Quote Originally Posted by 500ESpain View Post
    Didn't see any. It's thinner than the Sachs for sure. Kind of ACM looking.
    The only ones thick like OE are the OE/OEM, Sachs or Horton.

    All the thinner ones which require the shorter bolt are aftermarket (ACM, Vemo, or various no-name Chinese clones).

    You may want to go back to post #20 at the beginning of this thread, and check out the photos...


  23. #379
    E500E Guru 500ESpain's Avatar
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    Re: Viscous Fan Clutch Replacement

    Quote Originally Posted by gsxr View Post
    The only ones thick like OE are the OE/OEM, Sachs or Horton.

    All the thinner ones which require the shorter bolt are aftermarket (ACM, Vemo, or various no-name Chinese clones).

    You may want to go back to post #20 at the beginning of this thread, and check out the photos...

    I've seen that. That's why I went for the Sachs in the first place but it never worked and got me scratching my head for months and spending more money in other parts. It's a gamble, I know.
    Esteban

    1971 Seat 600E, 1981 Mercedes 300TD, 1984 Mercedes 300D, 1992 Mercedes 500E, 1995 Range Rover 4.6 HSE, 2005 Audi A4 2.5TDI Avant, 2007 Triumph Bonneville

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    Re: Viscous Fan Clutch Replacement

    If you're interested in how a fan clutch actually works, here's a great short video on the topic.

    (enjoy the GSXR porno movie background music)


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  27. #381
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    Re: Viscous Fan Clutch Replacement

    Another video that is also helpful.


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  29. #382
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    Re: Viscous Fan Clutch Replacement

    Does anyone know if the engaging temperature is different between the 103 vs 104 viscous-fan clutch ?

    Also, Mercedes is offering an OE "rebuilt" 103 viscous-fan clutch for almost half the cost of new. Are they good ?

    Thanks,
    neil

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    Re: Viscous Fan Clutch Replacement

    I thought the 103 and 104 shared the same clutch - no? Pretty sure the engagement would be the same, somewhere between 85-100C coolant temp, in warm ambients.

    I'd take a rebuilt OE clutch any day over aftermarket, but before you get too excited, call the dealer and see if it's actually available.


  31. #384
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    Re: Viscous Fan Clutch Replacement

    Quote Originally Posted by gsxr View Post
    I thought the 103 and 104 shared the same clutch - no? Pretty sure the engagement would be the same, somewhere between 85-100C coolant temp, in warm ambients.

    I'd take a rebuilt OE clutch any day over aftermarket, but before you get too excited, call the dealer and see if it's actually available.
    The 104 number I'm using is for a W202 C280/C36: 104-200-01-22

    W124: 103-200-04-22-81

    Perhaps the M104 W124 used the 103 ?

    neil

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    Re: Viscous Fan Clutch Replacement

    The M104 as used in the W124 (104.99X) does use the M103 viscous fan clutch mentioned above -- 103 200 04 22 [XX]. That is the generally accepted part number for the M104.

    Per the EPC, the 104 200 01 22 fan clutch is specified only for the 104.941 and some .942 engines (appears to be for W202 applications), as well as on the .992 engines up to 002496. So, it looks like it will also work in some limited 124 applications.

    I would recommend always using the 103 part, and going with either Behr (aftermarket) or MB (new or rebuilt), for a 104.99X application.

    I am actually using an M103 fan clutch on my G-wagen's M104 engine, as well, although it's a slightly different part number 103 200 11 22, which is specific to the M104 (G320) and M103 (300GE) based G-wagens. G-wagen fan-clutch HOW-TO is here: https://www.500eboard.com/forums/showthread.php?t=6152

    Cheers,
    Gerry

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  34. #386
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    Re: Viscous Fan Clutch Replacement

    Hi Guys,

    Which way does the bolt turn when you loosen the bolt? Is it clockwise or anti-clockwise?

    I've been trying to change the fan clutch but for the life of me cannot loosen the bolt because the pulley keeps slipping and now I'm starting to wonder if it's even the right way we're loosening it.

    The fan goes anti-clockwise so assuming that to loosen the bolt you have to do it clockwise which is opposite from the way the fan spins.

    Cheers
    Matin

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  35. #387
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    Re: Viscous Fan Clutch Replacement

    The thread is standard and loosens counter clockwise. Have a helper put additional preasure on the belt if possible. A soft wedge between pully and belt may also work.

    drew
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  37. #388
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    Re: Viscous Fan Clutch Replacement

    Quote Originally Posted by sheward View Post
    The thread is standard and loosens counter clockwise. Have a helper put additional preasure on the belt if possible. A soft wedge between pully and belt may also work.

    drew
    Got it off, the bolt was on extremely tight...got there in the end, changed the clutch and wow does it blow some nice air now!
    Matin

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  39. #389
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    Re: Viscous Fan Clutch Replacement

    Quote Originally Posted by gsxr View Post

    If you can still find an ACM clutch, that is the low-cost fix for the fan. I'm only seeing ACM at ECStuning and FCP, and the photos look different than the ACM I bought years ago:
    https://www.ecstuning.com/b-acm-part...192000122~acm/
    https://www.fcpeuro.com/products/mer...500-1192000122


    FYI - here is anecdotal data from someone who installed the ACM (or Borg-Warner) viscous fan clutch on their M119 9 years ago. (Actually if you read the thread, you can totally feel the dude's pain when he didn't know that you need a shorter bolt for the ACM clutch). Anyways, the guy recently posted again 9 years after the original installation/post, indicating that he has found the clutch's performance in the past 9 years to be quite satisfactory.

    https://mbworld.org/forums/e-class-w...-ending-2.html
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  41. #390
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    Re: Viscous Fan Clutch Replacement

    Quote Originally Posted by gerryvz View Post
    The M104 as used in the W124 (104.99X) does use the M103 viscous fan clutch mentioned above -- 103 200 04 22 [XX]. That is the generally accepted part number for the M104.

    Per the EPC, the 104 200 01 22 fan clutch is specified only for the 104.941 and some .942 engines (appears to be for W202 applications), as well as on the .992 engines up to 002496. So, it looks like it will also work in some limited 124 applications.

    I would recommend always using the 103 part, and going with either Behr (aftermarket) or MB (new or rebuilt), for a 104.99X application.

    I am actually using an M103 fan clutch on my G-wagen's M104 engine, as well, although it's a slightly different part number 103 200 11 22, which is specific to the M104 (G320) and M103 (300GE) based G-wagens. G-wagen fan-clutch HOW-TO is here: https://www.500eboard.com/forums/showthread.php?t=6152

    Cheers,
    Gerry
    I just ordered Sachs clutch for my E320 over the weekend and it is coming in tomorrow from Dubai. All of the US based retailers are out of stock on Sachs including Autohausaz.
    It is a tropical version though which supposedly means lower cut-in temp for the fan. Will see what effect it has.

    Below is the link:
    https://www.tool-jack.com/catalogue/...tor-fan_17501/

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  43. #391
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    Re: Fan clutch

    ADMIN EDIT: Copied this post from a different fan clutch tool thread (link), to keep all the info in one place.

    Quote Originally Posted by gerryvz View Post
    That fan clutch wrench is not correct for the M119.97x cars. ...
    Quote Originally Posted by gsxr View Post
    The C-shaped tool with 3 holes DOES NOT WORK on the W124 chassis with M119 engine (400E/500E, E420/E500). That tool is for different engine/chassis combinations. There's an old thread on this forum where someone tried to use this and found it simply does not fit between the clutch & pulley...
    Indeed not the right tool, found out first hand early this year. I ended up modifying it and grinding down the thickness for it work, final result was this (I was in a pinch, and neeeeeeded it to work):



    It is perfectly usable now, but highly recommend starting with the right tools as mentioned above.

    Regards,
    D

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    Re: Fan clutch

    D, thanks for the photo... I was going to suggest that grinding one down MIGHT work, but I wasn't sure. Now we know it is possible!!


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  46. #393
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    Re: Viscous Fan Clutch Replacement

    Dave, it is precisely as you said, the space between the clutch and the pulley is very very limited. However, once that $20 tool is chopped and thinned out a bit, it just slides freely in between, and works really well. I know I needed that leverage in my car!

    Regards,
    D

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  48. #394
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    Re: Viscous Fan Clutch Replacement

    It looks like I'll have to replace my clutch like most of the folks here. Has anybody tried to substitute M119 clutch with M104 part? It would have to be replaced with the fan as it has different bolt pattern. The fan itself is also 9 blades design but lightweight plastic rather than magnesium. It also has smaller fins but I'm not sure if that matters that much. I've heard about few folks here in Poland who did this mod and they never regret - engine temp stays correct even in hot summer. The reason I'm asking is the part availability - we all know about ridiculous OE clutch price, ACM is not available at all in Europe AFAIK, all the rest that can be bought here is garbage - Hamburg Technic, Topran etc. I can buy M104 clutch made by Hella/Behr at very reasonable price, the fan itself is darn cheap and widely available. Any thoughts or first hand experience?
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  50. #395
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    Re: Viscous Fan Clutch Replacement

    I have no firsthand experience, but first make sure the M104 clutch+fan rotates in the same direction. I think the M104 rotates in the opposite direction, so the fan blade wouldn't work, you'd need a different plastic fan. I'm not certain if the skinny 6-cyl clutches will work the same in CW vs CCW rotation, the thick V8/V12 clutches have an internal spring/valve that I believe only works properly spinning in one direction.

    Also, the Behr/Hella branded clutches that are inexpensive are very likely made in China. If this mod works, try to get a Sachs/Horton version if possible.

    UPDATE: Confirmed the M119 fan rotates CCW as viewed from the front, and most M104 also appear to rotate CCW.


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  52. #396
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    Re: Viscous Fan Clutch Replacement

    I have no firsthand experience, but first make sure the M104 clutch+fan rotates in the same direction.
    You got me here! I didn't think about rotation at all... Maybe someone with M104 can chime in here? If I ever go that route I will definitely replace the whole set - fan + clutch. My current aftermarket clutch is skinny already, I have no idea what brand PO installed but I have no doubts it is a cheap Chinese knock off.
    Also, the Behr/Hella branded clutches that are inexpensive are very likely made in China.
    Saying "reasonable" I mean 2-3 times more than other aftermarket clutches. It costs pretty much the same ($130) as ACM in US.
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  54. #397
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    Re: Viscous Fan Clutch Replacement

    Quote Originally Posted by darek_u View Post
    You got me here! I didn't think about rotation at all... Maybe someone with M104 can chime in here? ...
    On R129 M104 the fan rotates counterclockwise as you facing the motor:



    Diameter of the blades span is about 18", hope this helps...

    Regards,
    D

    EDIT: Here is M104 on W124 for reference https://www.pelicanparts.com/techart...ud_and_Fan.htm
    Last edited by Duh_Vinci; 4 Weeks Ago at 05:06 PM.

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  56. #398
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    Re: Viscous Fan Clutch Replacement

    Counterclockwise = similar to M119, right? That would be great. The fan I'm thinking about is OE p/n 1032000423, diameter is 430 mm and it looks like the one below. I don't know what the exact diameter of M119 fan is but it should be close if not identical.

    fan.JPG
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  57. #399
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    Re: Viscous Fan Clutch Replacement

    I'm assuming so, in the same counterclockwise direction in m119 as well, judging by the picture of the blade shape in this thread https://www.500eboard.com/forums/sho...ll=1#post25495 ?

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    Re: Viscous Fan Clutch Replacement

    I have used M119 and M104 (both E320 and G320) fan clutches close at hand. I will make some measurements on key things and dimensions and report back.

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  61. #401
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    Re: Viscous Fan Clutch Replacement

    Is it true that on our .036’s you have to remove the radiator to replace the fan clutch due to not enough space between the fan clutch and the radiator?


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    Viscous Fan Clutch Replacement

    You don’t have to, if you shorten an Allen key end to insert into the fan clutch bolt to clear the radiator.

    The problem is that there is often not enough leverage and space to fully insert the shortened Allen key end into the bolt, or if this is done, not enough leverage to loosen a very tight/stuck fan clutch bolt.

    This bolt is HIGHLY prone to accidental strippage.

    However it is strongly advised to remove the radiator, even if just to protect it from accidental damage. There is a HOW-TO on doing this, and it’s only a 20-30 minute job to remove. It also gives an opportunity to inspect and clean the radiator, if necessary, due to cloggage with dirt and stuff.

    Removing the radiator allow you to get a straight shot to the fan clutch bolt to apply enough leverage to loosen it and help avoid stripping it.

    Also, removing the radiator is great outlet in case your “lowmania” disease has flared up that day.

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  64. #403
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    Re: Viscous Fan Clutch Replacement

    Quote Originally Posted by Eno View Post
    Is it true that on our .036’s you have to remove the radiator to replace the fan clutch due to not enough space between the fan clutch and the radiator?
    It's possible with special tools, if the bolt head is not stripped, and the bolt is not excessively tight. Otherwise, the radiator would need to come out.

    See post #2 and #4 at the beginning of this thread for photos of the special tools. After it's been R&R'd once and all the fasteners cleaned up, it's possible to remove the fan+clutch in 5-10 minutes. Clearance to the radiator varies due to manufacturing tolerances, it goes faster on cars with a bit more space. Typical is about 24mm air gap from the radiator fins to the plastic cover on the face of the clutch, ±2mm or so.

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    Re: Viscous Fan Clutch Replacement

    Quote Originally Posted by gerryvz View Post
    I have used M119 and M104 (both E320 and G320) fan clutches close at hand. I will make some measurements on key things and dimensions and report back.
    One difference right off the bat, is that the M103/M104 fan clutch has three bolts that hold it onto the fan, while the M119 fan clutch uses four bolts. Photos coming soon.

    Cheers,
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    Re: Viscous Fan Clutch Replacement

    How long does the job of replacing fan clutch takes with radiator in place and with out, assuming it's done by someone who know what he's doing?

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    Re: Viscous Fan Clutch Replacement

    Quote Originally Posted by kiev View Post
    How long does the job of replacing fan clutch takes with radiator in place and with out, assuming it's done by someone who know what he's doing?
    Hour should be ample if you have the special tools allowing for time to clean things up some etc..

    Now this is also assuming the fan shroud wants to cooperate/the front end hasn't been smacked.

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    Re: Viscous Fan Clutch Replacement

    Quote Originally Posted by darek_u View Post
    You got me here! I didn't think about rotation at all... Maybe someone with M104 can chime in here? If I ever go that route I will definitely replace the whole set - fan + clutch. My current aftermarket clutch is skinny already, I have no idea what brand PO installed but I have no doubts it is a cheap Chinese knock off.

    Saying "reasonable" I mean 2-3 times more than other aftermarket clutches. It costs pretty much the same ($130) as ACM in US.
    Regarding M104 clutch, if you buy it from the dealer, it is a Behr brand made in China unit. So, might as well buy Behr aftermarket for 1/2 the price.
    I was able to get Sachs Made in Germany clutch but it is the tropical version from a dealer in Abu Dabhi. AutohausAZ used to be able to source Sachs but not anymore.

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    Re: Viscous Fan Clutch Replacement

    Are you sure the Behr units from MB dealers are made in China? I recently ordered a new M104 fan clutch for my G320 (it's a slightly different part number than the regular M104s as used in the 124 models). It was a Sachs/Horton unit, and the label on the MB box said "Made in Germany."

    I know the current factory clutches for the M119 are also Sachs/Horton and made in Germany.

  73. #409
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    Re: Viscous Fan Clutch Replacement

    Quote Originally Posted by gerryvz View Post
    Are you sure the Behr units from MB dealers are made in China? I recently ordered a new M104 fan clutch for my G320 (it's a slightly different part number than the regular M104s as used in the 124 models). It was a Sachs/Horton unit, and the label on the MB box said "Made in Germany."

    I know the current factory clutches for the M119 are also Sachs/Horton and made in Germany.
    Yup, ordered one from the dealer and it was Chinese Behr. Returned it next day.

    Below is the line item from the order that I had placed:
    103 200 04 22 fan drive list $280.00ea cost $210.00ea new only

  74. #410
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    Re: Viscous Fan Clutch Replacement

    This is most likely useless info, but just in case:

    ACM, made in China by NSK. From the latest batch


    IMG_20190209_180953.jpgIMG_20190209_180943.jpgIMG_20190209_180917.jpg

    Once, original MB fan clutch that is 4 years old, but has only 7k miles on it, comes out, can it be recycled, "adjusted", reused in any way, or is it a loss?
    Last edited by kiev; 1 Week Ago at 05:33 PM.

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  76. #411
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    Re: Viscous Fan Clutch Replacement

    How odd... ACM label on a Borg-Warner box. Hmmm. Once you get it installed and finish testing the cooling/airflow performance, I'm curious if it will disengage at high RPM. Older ACM clutches would do so, at a higher RPM than stock, but would disengage. Vemo (the only other brand I tested) refused to disengage even at redline, making for noisy WOT runs.

    The original clutch can be adjusted to work properly, but it's a very tedious trial & error process, with a high risk factor (i.e., if you mess it up, it can destroy the clutch + radiator).

    In the meantime I can't wait to hear what happens when you get the ACM in there!


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    Re: Viscous Fan Clutch Replacement

    I just put the same ACM fan clutch on my 400E. I remember looking it over pretty carefully, but don't recall seeing anything regarding being manuf. in China by NSK. Where did you get that info? Is it on one of the labels on the Borg Warner piece of cardboard?

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  79. #413
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    Re: Viscous Fan Clutch Replacement

    Gsxr, yes, Borg Warner box, inside this part in cellophane with a sticker ACM Germany. BTW, going to junkyard in Baltimore in my 400E I, for the first in a very long time, was able to drive at 80 mph for stretches at a time, in light traffic, in sub 60f. Coolant temp stayed at 82-85C when I was moving fast and freely

    MB V8, Zoom in on the orange circle by the center of clutch. You'll see NSK and China stamped. How do you like the result of the new clutch?
    Last edited by kiev; 1 Week Ago at 07:42 PM.

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  81. #414
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    Re: Viscous Fan Clutch Replacement

    Quote Originally Posted by gsxr View Post
    How odd... ACM label on a Borg-Warner box. Hmmm. Once you get it installed and finish testing the cooling/airflow performance, I'm curious if it will disengage at high RPM.
    Quote Originally Posted by kiev View Post
    Gsxr, yes, Borg Warner box, inside this part in cellophane with a sticker ACM Germany.
    I installed an ACM fan clutch almost exactly two years ago. It also came in a Borg Warner box. The bearings were marked NSK and made in China.
    The ACM fan clutch I installed does indeed cut out at higher RPMs, although I never made a note to mark exactly at what RPM.
    It has proven to be quite satisfactory in operation for me. That said, since I live in Northern California, the climate here is not exactly thermally challenging for the 500E.

    IMG_4806.jpg
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    Last edited by Jlaa; 1 Week Ago at 08:40 PM.
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  83. #415
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    Re: Viscous Fan Clutch Replacement

    So, ACM fan clutch resolved my running-warmer-then-proper issue. Good stuff

    [Admin edit: Details in this post.]

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