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  #1  
Old 03-03-2002, 05:30 PM
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Join Date: May 2001
Location: Charleston, SC
Posts: 237
Power stering pump pulley squeak cure?

My power steering pump (240d) pulley makes a terrible squeaking racket for about 5 minutes until car warms up. IN attempting to isolate it originally, I was able to quiet it by squirting it with wd-40. It has now returned with a vengeance. I saw p/s pump pulleys listed but not carried on Fastlane. Is this what I need or is there a way to grease bearing on my pulley if I remove (if so I would appreciate instructions on R&R).
I am assuming that this is not related to p/s internals as they seem fine and my external squirt of lubricant silenced it.

All help appreciated.

P.S. somewhat OT, is it OK to contnue to use P/S bolt for valve adjustments (no clearance at crank until I repace Motor mounts).

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2008 GL320CDI 6K
1970 280SL 112K
1982 240D 210K (Sold)
1973 220D 220K (Sold)
1967 200D 160K (Sold)
1992 400E 139K (Sold)
1988 300E 148K (Sold)
1987 300D 257K (Sold)
1991 300E 108K (Sold)
1987 300E 131K (Sold)
1978 300D TMU (Sold)
1980 300D TMU (Sold)
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  #2  
Old 03-04-2002, 10:21 AM
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Join Date: Feb 2001
Location: Atlanta, GA
Posts: 55
My 1980 240D has the same problem. If the car sits for two days or more it squeals like dying pig on start up. I think my problem is caused by a small leak at the pulley bearing. The PS fluid level is down just slightly (I've been keeping an eye on it) and the noise goes away after about 5 minutes. I've been debating on whether to fix it right now or not. Seems like a lot of work considering it isn't too bad at the moment.
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James Duffey
Atlanta, GA
1963 MGB
1972 300SEL
1980 240D
1989 300SEL
1995 E300D
2000 Audi S4
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  #3  
Old 03-20-2002, 11:07 AM
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Join Date: Dec 2001
Location: Indiana
Posts: 17
I suspect your front seal is leaking and dripping onto the pulley. When you start your car the oil that has leaked down the pulley and causes the belt to squeal until it burns off. The seal kit from the mecedes dealer is only $20 but it requires removal of the pump to replace it. (All outlined in a good repair manual). Don't spend big money on a new pump until you try this. If when you get it off the bearings are bad (there is play in the shaft) you can swap the pump for a rebuilt one.
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  #4  
Old 03-21-2002, 11:57 AM
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Join Date: Aug 2000
Posts: 49
I had a leaking seal with my pump. Adding 10% (by volume) of one of the "stop leak" products has SEEMED to have at least slowed the leak. My problem was not squeeling, but throwing ps fluid all over inside the engine bay, particularly onto the fan, which of course slings it all over.
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Jeff Naumann
Torrance, California
1972 220D 138k miles (sold)
1982 300SD 263k miles
1989 BMW 750iL 183k miles
1993 Dodge D250 Cummins 5.9 202k Miles
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  #5  
Old 03-22-2002, 10:07 AM
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Join Date: May 2001
Location: Charleston, SC
Posts: 237
Thanks for info.

Will check out.
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2008 GL320CDI 6K
1970 280SL 112K
1982 240D 210K (Sold)
1973 220D 220K (Sold)
1967 200D 160K (Sold)
1992 400E 139K (Sold)
1988 300E 148K (Sold)
1987 300D 257K (Sold)
1991 300E 108K (Sold)
1987 300E 131K (Sold)
1978 300D TMU (Sold)
1980 300D TMU (Sold)
MBCA Member
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  #6  
Old 08-26-2002, 11:33 AM
EricSilver's Avatar
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Join Date: Mar 2000
Location: Fairfax, VA
Posts: 1,322
Uh Oh.

I added the Prestone stop leak to mine -- except the instructions said to add the entire bottle. My pump now squeals a lot, and I am wondering if this is a self-correcting part of the processes, or a new problem?

The leak actually began when, on my mechanic's advice, I used ATF in place of steering fluid. I had tried draining all the ATF (with a turkey baster) but I can't seem to get all of it out.
Any thoughts and suggestions would be appreciated.
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  #7  
Old 08-26-2002, 12:10 PM
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Join Date: May 2001
Location: Charleston, SC
Posts: 237
Perform a search for details.

Never had a leak (at least that I noticed) so have never addressed as problem went away after fluid flush. If you have a noticeable leakage, isolate it by having someone turn wheel to lock (raises pressure) and locate by fluid movement and replace the affected hose (likely culprit) or tighten fitting (next most likely).

Regarding fluid change, there are 2 methods, one for W123s that involves removing return hose for flush (post links another site with good detailed instructions) and a method that I posted for W124s that involves inserting tube inside canister at return port for flush.

Remember to change the filter too. As part of my flush, I replaced fluid with Mercedes P/S fluid and now pump is no longer making any noise. Recommendation: always use Mercedes fluids (wheel grease, coolant, p/s fluid etc) except for oil, of course, and maybe ATF.

Good luck. Reply if any questions or if you can't find posts.

P.S. I never responded with this cure because until today forgot about problem and hadn't associated cure with fluid change (squeek just went away, like not noticing the proverbial clean face, and I didn't notice).

__________________
2008 GL320CDI 6K
1970 280SL 112K
1982 240D 210K (Sold)
1973 220D 220K (Sold)
1967 200D 160K (Sold)
1992 400E 139K (Sold)
1988 300E 148K (Sold)
1987 300D 257K (Sold)
1991 300E 108K (Sold)
1987 300E 131K (Sold)
1978 300D TMU (Sold)
1980 300D TMU (Sold)
MBCA Member

Last edited by CarolinaMBZ; 08-26-2002 at 12:19 PM.
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