c32///

hey guys i have my c32 that has a code 3 intake/pulley and k&ns and other small mods...anyways recently i noticed a bearing sound or knocking noise coming from under the hood. The noise goes away a bit when the engine gets warm(to operating temperature since im in toronto, Canada and its pretty cold now). However the noise is amplified when the car is put in gear ( D or R ). i took off the serpentine belt today and moved the pulleys and all bearing seemed fine, i couldnt hear anything either with my stethoscope. The tensioner pulley was moving a bit though and it kind of seemed consistent with the sound...anyways i dont know what it is and my local shop doesnt either...im not really intrested to take it to the stealership cause theyre gunna charge me an arm and a leg plus give me **** for my code 3 pulley. So if anyone has tips comments or any help please respond cause i dont know what im gunn do

Newzchspy

Probably an idler bearing or SC bearing.......

Does it have the PSK on it?? If not, get one from Needswings.....

c32///

what does the PSK do? lol or is it self explanatory ?

Newzchspy

Go to : www.needswings.com under Mercedes tab and then C32.......

or you can look at the SRT-6 PSK too, same product

c32///

ok thanks and if its the supercharger bearing or the idler do you know where i can get it from? most probably its the supercahrger bearing cause when i was stock without c3 pulley i didnt have this noise. is the oem bearing the same size as the code 3?

Newzchspy

I believe the OEM is the same as Code 3 and you can go to the successor of Code 3 to get that..........

http://www.hpashop.com/

** I just called HP in California and they did confirm that the OEM bearing is the same for the Code 3 bearing.......................

If that's the case, I believe there's a post on here where someone is selling for $25.00??

c32///

okay thanks man just to confirm...is it this that will work with my code 3 pulley : http://www.hpashop.com/product.sc?pr...&categoryId=58

sorry i just re-read it lol, ok if its the same i will replace it and look to see if there any other problems, OH before i forget is the shaking of the tensioner pulley normal? if u give me an email i can send u a video. appreciate the help man!

Newzchspy

Are you referring to the crank pulley at the base of the engine (reason I ask is that mine went bad and I had to replace) . If its the tensioner # 9 in diagram, then its probably a bad pulley on there as well

c32///

yeah im talking about #9 the tensioner is where there was vibration and play, is it the whole pulley?

320 dreamer

tensioner is spring loaded and will move as the belt runs over it. with the engine running VERY CAREFULLEY use the stethoscope on the end of the bolt attaching the various idler and s/c pulleys . the one thats bad will be obvious

c32///

i tried that with a pry bar listening to the end of it but got nothing. however i took it to the shop that installed my code 3 pulley and they said it all seems good but that was ebcause my engine was very warm. its a lot worse when the engines cold or in gear. anyways ill get a stethoscope tommorow and try it...is it a special automotive stetho. or any will do?

FrankW

if it's the clutch bearing the noise will go away when you step on the throttle in gear when it engages.

if it's a constant noise then it's most likely the idler bearing. it's usually the #4 pulley that's common to have issues. i would suggest replacing it asap. you do not want it to seize and blow up while driving.

c32///

When I put it in gear it's loud but when I start moving it's gone, however when I'm at a stoplight and im holding the brake I can still hear it. Btw this only started happening as soon as i switched tothe code 3 pulley; If that helps. Where is the clutch bearing? Behind the code 3 pulley? How do I change it and who sells it?...frank if u pm your email I can send u a video if it helps cause I dont want this thing blowing up on me

ScottW911

I picked one up from Harbor Freight tools for about $4. It is just a stethoscope with a long aluminum probe on the end.

03MBC32

FWIW, I had a rattling sound too. All idlers were fine as was the sc bearing. It was the sc clutch.

Wayne

c32///

So how did u change the supercharger clutch

c32///

LINK: http://www.youtube.com/watch?v=MaMPS8FcewU

guys the sound starts at about :38 seconds...let me know if thats what the noise from the supercharger clutch bearing is....and also if the squeal tht starts at 2 seconds and later goes away is normal...that squeal usually starts only on cold starts

03MBC32

Replace with a new one.... $1500.

c32///

I don't think that's the case....everything was fine til I installed the code 3 pulley...that was only 300kms ago... And I heard the noise when it was installed it just wasn't as loud...I doubt it's the clutch itself..

03MBC32

Definitely idler bearing, sc bearing or both. I hope the rattling is not your sc clutch. My old sc clutch rattles when I shake it. Probably lose rivets.

c32///

what exactly are you talking about? what number in the diagram?

03MBC32

Put a stethoscope on #4 and #6 idlers plus the sc clutch #5.

Zeppelin

The problem is that your belt is too long and it is causing the tensioner to bottom out causing the ratcheting noise. You need a shorter belt or you need to use a bigger pulley on one of the idlers.

FrankW

doesn't sound like the sc clutch bearing. the bad sc bearing would sound like this http://www.youtube.com/watch?v=LAcmJRZrpBo

i think it should be what zeppelin is describing.

c32///

is it too long now that the code 3 pulley has went in? and where do i get a shorter belt? or where do i get a larger pulley and for which pulley (what # in the diagram) ...thanks for the help guys still trying to solve it