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Old 05-25-2010, 12:18 AM
MercFan's Avatar
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Join Date: Nov 2004
Location: Denver, CO
Posts: 994
Got it started, now it sqeals when accellerating...

I finally got the the 300SDL started once after replacing the lift pump, servicing the injectors (thanks C Sean Watts), cleaning out the intake manifold, reaming the glow plugs and flushing out the Power Steering fluid (w/new filter).

After installing a fresh new Duralast DL049 battery from AutoZone, I managed to fairly easily restart the car. Tightened everything up and took the car for a ride - it runs smooth, but after I punched the accelerator a bit I noticed a loud sqeal building and subsiding only when I take my foot of the pedal... I'm thinking it may be the serpentine belt... afterall I made a huge mess with the P/S fluid the day I was flushing it out - it went all over the front (driver's side) of the car including the serpentine belt and pulleys...

Is it better to try to take off the belt to clean it? It sure is greasy when I run my fingers on it on those grooves... or can you just use some degreaser to remove the grease and grime off it it?! Should I use a degreaser, like a Purple Power that I have, or Brake Kleener...

What else could be causing this whine/sqeal under there?

1987 Mercedes 300SDL; SOLD
1985 Mercedes 300D; SOLD
2006 Honda Pilot - wife's ride; 122K;
1995 Toyota Land Cruiser - 3X locked; 182K
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Old 05-25-2010, 01:50 AM
cirrusman's Avatar
Just add Diesel.
Join Date: Aug 2008
Location: Salt Lake City, Utah
Posts: 587
Yeah, that sounds like a belt... just use a belt cleaner from your local autoparts shop; that should take care of it.

1983 Mercedes Benz 300SD - Wife calls him "Chitty Chitty Bang Bang"

1983 Toyota Tercel (Tommy, The little Toyota that could)
1965 Ford F100 (Grandma Ford)
2005 Toyota Sienna (Elsa, Wife's ride)

1988 Toyota Pickup
2004 Subaru Outback

1987 Cadillac Fleetwood Brougham
1986 Volvo 740 GL Station Wagon - Piece of junk.
1981 Volvo 242 DL 2 Door - Hated to see it go. R.I.P.
1987 Pontiac Fiero GT
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Old 05-25-2010, 08:52 AM
vstech's Avatar
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,389
I've used engine degreaser, let it soak into the pulleys and all over the belt, then rinse well. no issues so far.
however, with a serpentine belt, there's not much rubber to play with, so if it looks like the belt is damaged, just replace it. it's the only belt on the car, and you DON"T wanna overheat the car!!!

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