*STOCK C32 / M112K owners: Check your OE Idler pulley!!!*
#77
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2002 C32 AMG selling
Got a different, but similar, problem with my 2002 C32 (75K miles)
http://www.youtube.com/watch?v=LM48KqP8rGU
Any ideas?
http://www.youtube.com/watch?v=LM48KqP8rGU
Any ideas?
#78
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2002 C32 AMG selling
... because I definitely have a strange sound coming from under my hood.
I have noticed it seems to come and go. When I have come off an extended freeway or hard drive, it is there. When the car idles for a minute or two, the sound will often fade away. It sounds like a bad bearing to me. I wonder if the idler pulley gets worse at warmest temps.
I have noticed it seems to come and go. When I have come off an extended freeway or hard drive, it is there. When the car idles for a minute or two, the sound will often fade away. It sounds like a bad bearing to me. I wonder if the idler pulley gets worse at warmest temps.
http://www.youtube.com/watch?v=LM48KqP8rGU
If you found a solution, please let me know.
Thanks
Last edited by positronicC32; 06-06-2011 at 08:17 AM. Reason: Missed the quote
#79
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Got a different, but similar, problem with my 2002 C32 (75K miles)
http://www.youtube.com/watch?v=LM48KqP8rGU
Any ideas?
http://www.youtube.com/watch?v=LM48KqP8rGU
Any ideas?
If that doesn't fix the sound, it's probably the supercharger pulley
#80
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2002 C32 AMG selling
SC bearing or pulley causing rattling
It doesn't matter if the sound is coming from the idler pulley or not. At 75k, it's time to change at least pulley #4. I went ahead and changed pulley #6 because it was $30 and an extra 5 minutes of my time.
If that doesn't fix the sound, it's probably the supercharger pulley
If that doesn't fix the sound, it's probably the supercharger pulley
#81
Super Member
I ordered an NSK OEM SC bearing and will see if that is a fix. I used a stethoscope to isolate the sound to the SC clutch/bearing, but it's not possible to recreate the sound in the video I posted whilst in Park and idling. I'll get my guy to look at ALL the pulleys when I install the bearing, just as a precaution. Thanks for the feedback.
#82
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scion IQ(five axis), smart fortwo crossblade, austin rover mini
there seems to be tale-tell signs someting is wrong with @ least on of the pulleys when there is an occaionsal whining noise(in additon to the belt). This is very prevalent during cold nights or days and more apparent in temperatures below ~45F (and especially below 25F.
Bearings seems to whine more during cold winters or home air-conditioned garages? (bearing freeze or freezes). I have noticed these whining noises during the heavy summer months in southern cali and central TX. But then again, some may have waited a bit too long for attention to these pulleys where it doesn't matter if it is summer or winter?
Bearings seems to whine more during cold winters or home air-conditioned garages? (bearing freeze or freezes). I have noticed these whining noises during the heavy summer months in southern cali and central TX. But then again, some may have waited a bit too long for attention to these pulleys where it doesn't matter if it is summer or winter?
Last edited by ttus; 06-20-2011 at 04:31 AM.
#83
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2002 C32 AMG selling
It doesn't matter if the sound is coming from the idler pulley or not. At 75k, it's time to change at least pulley #4. I went ahead and changed pulley #6 because it was $30 and an extra 5 minutes of my time.
If that doesn't fix the sound, it's probably the supercharger pulley
If that doesn't fix the sound, it's probably the supercharger pulley
#84
Super Moderator
Stethoscope observation revealed that the upper idler pulley (#6) was past due for renewal.
Sourced a suitable OEM replacement (#120 200 04 70) for less than $30.
Reused its existing bolt torqued to 20Nm with a dollop of #242 Loctite.
Of course that pulley and its mounting bracket must be removed in order to facilitate belt replacement.
Owing to an irrepressible ‘while you’re in there’ mindset, swapped in a fresh belt concurrently.
Surprisingly little wear after 50,000+ miles, although there was irrefutable evidence of the belt having lost a good fight against the supercharger’s drive pulley under the front cover.
tech notes:
My dampened 178mm evosport crank pulley was supplied with a different diameter idler pulley.
Gates’ 2910mm belt (vs. 2902mm OE) worked perfectly in this instance.
The tensioning pulley (#9) still has ~1/2” of additional travel before ultimately reaching its limit.
New setup runs almost as tight as a snare drum. ymmv
Sourced a suitable OEM replacement (#120 200 04 70) for less than $30.
Reused its existing bolt torqued to 20Nm with a dollop of #242 Loctite.
Of course that pulley and its mounting bracket must be removed in order to facilitate belt replacement.
Owing to an irrepressible ‘while you’re in there’ mindset, swapped in a fresh belt concurrently.
Surprisingly little wear after 50,000+ miles, although there was irrefutable evidence of the belt having lost a good fight against the supercharger’s drive pulley under the front cover.
tech notes:
My dampened 178mm evosport crank pulley was supplied with a different diameter idler pulley.
Gates’ 2910mm belt (vs. 2902mm OE) worked perfectly in this instance.
The tensioning pulley (#9) still has ~1/2” of additional travel before ultimately reaching its limit.
New setup runs almost as tight as a snare drum. ymmv
#86
Ok so I started hearing a weird whine during a cold startup that sounded similar to the issues in this thread. Went away and car seemed to pull/drive fine. Did the stethoscope check and the #4 idler was making a slight grinding noise like you said......ordered new part (green new part#). So i take out old idler and am about to place new o e when i noticed there was a slight deformity in the new idler pulley. Do you think I should put the old o e back on or should I place the new one?
#87
Ok so I started hearing a weird whine during a cold startup that sounded similar to the issues in this thread. Went away and car seemed to pull/drive fine. Did the stethoscope check and the #4 idler was making a slight grinding noise like you said......ordered new part (green new part#). So i take out old idler and am about to place new o e when i noticed there was a slight deformity in the new idler pulley. Do you think I should put the old o e back on or should I place the new one?
#90
Yeah I think I'm going to try that. This was honestly a temporary fix, as I plan on doing the PSK kit once I start start practicing. Dental school has been breaking my bank big time! Thanks for such a quick response!
#91
I have one 2002 c32 amg w 50k , and my supercharger having this noise like in this video from YouTube , 3 mechanics 3 different opinions first to replace the all spcgr and pulleys for 4500$ second to change the inside BS part for 1300$ minimum and a third just waiting ,what did you think I can do ? car in excellent condition except this issue , no personal experience with garage and hand work at cars , thanks
#92
I wanna say there is a thread on this type situation but not sure...as for opinion honestly don't want to steer you wrong way thus I'd say keep searching and asking questions if it sounds like this it may be something internal in SC a new pulley won't help that so maybe try to get cost out of it
Last edited by c32used; 03-11-2014 at 04:21 PM.
#93
I have one 2002 c32 amg w 50k , and my supercharger having this noise like in this video from YouTube , 3 mechanics 3 different opinions first to replace the all spcgr and pulleys for 4500$ second to change the inside BS part for 1300$ minimum and a third just waiting ,what did you think I can do ? car in excellent condition except this issue , no personal experience with garage and hand work at cars , thanks
http://youtu.be/5CL4aqgGlRs
http://youtu.be/5CL4aqgGlRs
Second of all, the reason why is because these cars are notorious for going through pulleys and their bearings and it makes it really hard to distinguish between all the possible variations of what could be wrong.
Expect only 50-75K miles from any of the following pulleys and their bearings front the diagram posted on the first page of this thread:
6 guide pulley
5 electromagnetic clutch
4 guide pulley
9 tensioning pulley
Lastly, nothing too expensive and hard to do yourself unless you take it to a shop where they tend to like to just replace everything vs just damaged goods.
#94
You can also change pulley bearings, drill/mill those "bolts" and take old bearing out, then new bearing and push it back together and use bolts&nuts to replace those drilled "bolts". New bearing costs about 10bucks.
#95
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E63 SL55 996TT C5Z06
smaller idler pulley size with ASP 178mm pulley kit???
the c32 is in the shop today because the smaller sized idler pulley that comes with the ASP 178mm pulley kit went bad and caused my belt to come off.
anyone know the size of that smaller idler pulley that comes with the ASP 178mm pulley kit???
I searched and cant find it anywhere. the stock idler pulley is 90mm but doens't work with the ASP 178mm kit as the kit is designed to work with the stock sized belt. the idler pulley in the needswings PSK is larger 100mm and that seems like a good kit, so amstrongly considering getting one instead of trying to find a replacement for this smaller sized idler pulley that i cant seem to find. i called into ASP and left a message as nobody picked up.
anyone know the size of that smaller idler pulley that comes with the ASP 178mm pulley kit???
I searched and cant find it anywhere. the stock idler pulley is 90mm but doens't work with the ASP 178mm kit as the kit is designed to work with the stock sized belt. the idler pulley in the needswings PSK is larger 100mm and that seems like a good kit, so amstrongly considering getting one instead of trying to find a replacement for this smaller sized idler pulley that i cant seem to find. i called into ASP and left a message as nobody picked up.
#96
I'm using EC 178mm Pulley with the original idler for 4 years now, it's fine.
the c32 is in
the shop today because the smaller sized idler pulley that comes with the ASP 178mm pulley kit went bad and caused my belt to come off.
anyone know the size of that smaller idler pulley that comes with the ASP 178mm pulley kit???
I searched and cant find it anywhere. the stock idler pulley is 90mm but doens't work with the ASP 178mm kit as the kit is designed to work with the stock sized belt. the idler pulley in the needswings PSK is larger 100mm and that seems like a good kit, so amstrongly considering getting one instead of trying to find a replacement for this smaller sized idler pulley that i cant seem to find. i called into ASP and left a message as nobody picked up.
the shop today because the smaller sized idler pulley that comes with the ASP 178mm pulley kit went bad and caused my belt to come off.
anyone know the size of that smaller idler pulley that comes with the ASP 178mm pulley kit???
I searched and cant find it anywhere. the stock idler pulley is 90mm but doens't work with the ASP 178mm kit as the kit is designed to work with the stock sized belt. the idler pulley in the needswings PSK is larger 100mm and that seems like a good kit, so amstrongly considering getting one instead of trying to find a replacement for this smaller sized idler pulley that i cant seem to find. i called into ASP and left a message as nobody picked up.
#97
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E63 SL55 996TT C5Z06
my ASP 178mm pulley kit included smaller idler pulleys so the stock belt would work.
http://www.eurocharged.com/products/...pullies-detail
#98
I'm not using the EC idle pulley in the link.
I'm using the original as this is my second idle pulley, the belt is tiger but it does fit.
I'm using the original as this is my second idle pulley, the belt is tiger but it does fit.
so you are running the EC 178mm pulley, with your original MB OEM idler pulley (not this upgraded EC pulley, link below) and the stock sized belt?
my ASP 178mm pulley kit included smaller idler pulleys so the stock belt would work.
http://www.eurocharged.com/products/...pullies-detail
my ASP 178mm pulley kit included smaller idler pulleys so the stock belt would work.
http://www.eurocharged.com/products/...pullies-detail
#99
Super Moderator
Stethoscope observation revealed that the upper idler pulley (#6) was past due for renewal.
Sourced a suitable OEM replacement (#120 200 04 70) for less than $30.
Reused its existing bolt torqued to 20Nm with a dollop of #242 Loctite.
Of course that pulley and its mounting bracket must be removed in order to facilitate belt replacement.
Owing to an irrepressible ‘while you’re in there’ mindset, swapped in a fresh belt concurrently.
Surprisingly little wear after 50,000+ miles, although there was irrefutable evidence of the belt having lost a good fight against the supercharger’s drive pulley under the front cover.
tech notes:
My dampened 178mm evosport crank pulley was supplied with a different diameter idler pulley.
Gates’ 2910mm belt (vs. 2902mm OE) worked perfectly in this instance.
The tensioning pulley (#9) still has ~1/2” of additional travel before ultimately reaching its limit.
New setup runs almost as tight as a snare drum. ymmv
Sourced a suitable OEM replacement (#120 200 04 70) for less than $30.
Reused its existing bolt torqued to 20Nm with a dollop of #242 Loctite.
Of course that pulley and its mounting bracket must be removed in order to facilitate belt replacement.
Owing to an irrepressible ‘while you’re in there’ mindset, swapped in a fresh belt concurrently.
Surprisingly little wear after 50,000+ miles, although there was irrefutable evidence of the belt having lost a good fight against the supercharger’s drive pulley under the front cover.
tech notes:
My dampened 178mm evosport crank pulley was supplied with a different diameter idler pulley.
Gates’ 2910mm belt (vs. 2902mm OE) worked perfectly in this instance.
The tensioning pulley (#9) still has ~1/2” of additional travel before ultimately reaching its limit.
New setup runs almost as tight as a snare drum. ymmv
fyi we're fixing up to do this same swap on another member's soon.