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-   -   96 E300 belts chirp/squeak. (http://www.peachparts.com/shopforum/tech-help/389259-96-e300-belts-chirp-squeak.html)

ChrisArnt 10-20-2017 03:22 PM

Well now I'm not sure which pulley to use...

the Pulley on there turns about 1/2 turn when I spin it. (Fenner from the parts store)
The one I took off that is from 2014 Turns like a quarter turn when I spin it. (INA from Pelican parts.)
Both look pretty good.

I guess I'll try it with the one I just cleaned and put back on and if it chirps I'll swap them out.

Diseasel300 10-20-2017 03:28 PM

INA is probably a more reputable brand. If it has a smooth feeling to it, I'd reuse it. It never squeaked with it installed right?

ChrisArnt 10-20-2017 03:33 PM

Quote:

Originally Posted by Diseasel300 (Post 3757830)
INA is probably a more reputable brand. If it has a smooth feeling to it, I'd reuse it. It never squeaked with it installed right?

It squeaked with it installed, but the car had been sitting for a year and a few months at that point.

I'll put it on.

I cleaned it and scuffed it.

party 10-20-2017 04:16 PM

This is not on a Benz, but this worked for me on the AC belt of a Nissan Hardbody which are notoriously picky with V belts. All belts were new and tension was good. What you're going to read seems counter intuitive, but it if you're going to change the belt anyway, which is where I was, you've got nothing to lose.

I saw a video on the YouTubes where a guy said to spray the belt with 303.

https://www.youtube.com/watch?v=_8RE8p_m8bA

I couldn't find my bottle of 303, so I used Mother's VLR which is similar and smells the same with more cleaning ability. Squirted a good bit on all sides of the belt with the motor running and the AC off. When I turned on the AC it was improved considerably, but would squawk for about half second when the compressor kicked on. The following day, DEAD SILENT. This lasted for about a month until I noticed a little chirping at idle. Sprayed some more product on it and it quieted down again.

ChrisArnt 10-20-2017 04:22 PM

OK. What's this fan clutch bearing?

I put it together and it didn't screech.

I put the fan on it started to screech.

I took the fan off and it still screeched.

ChrisArnt 10-20-2017 04:49 PM

Quote:

Originally Posted by Ferdman (Post 3757803)
Chris, the link in your Post #4 is for the fan clutch, not the fan clutch bearing bracket to which the fan clutch attaches. By the way never buy any URO parts because they are Chinese junk. Grab the fan clutch and check for excess play or wobble in the fan clutch bearing bracket.

My car does not have a fan clutch bearing bracket. There is no such part listed for a diesel.
There is for an E320.
Just not for a diesel.

The pulley behind the fan is connected to the water pump.

I tried the water test and it is the belt.
Stops for a few seconds with water.

Ugh.. New belt again.

engatwork 10-20-2017 05:38 PM

I've got a new water pump coming:).

ChrisArnt 10-20-2017 07:10 PM

Quote:

Originally Posted by engatwork (Post 3757856)
I've got a new water pump coming:).

Fingers crossed that I don't need one. :undecided


Got the fan back on. Drove for half an hour and now we are back to a pleasant chirp. I'll live with the dang chirp.

97 SL320 10-20-2017 07:37 PM

When water spray makes it quiet, that isn't a water pump issue.

The pulleys might need cleaned again. Did the label get lightly sanded?

Ferdman 10-21-2017 07:03 AM

Chris, I read your Post#27 again and it's not normal for the water pump to make a scraping sound when you turn the pulley. How old is the water pump? It's possible the water pump is starting to fail and needs replacement. If so, best to buy a remanufactured one from your local MB dealer. Turn in the old one to avoid paying the core charge.

97 SL320 10-21-2017 09:48 AM

Water pumps will have a slightly dragging, rubbery feel due to seal friction.


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