Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 12-25-2009, 04:10 AM
Registered User
Join Date: Dec 2009
Location: Sydney Australia
Posts: 29
1989 300TE m103 engin whirr

Hi guys, i just picked this car up and it is my first Benz-i love it. I have noticed a bit of a whirring sound when the engine runs. Is this normal for one of these pups? Perhaps a normal sound due to a timing chain not a belt etc? If this is not normal then what could this be? Any pointers would be greatly appreciated. Motor runs great.

Reply With Quote
Old 12-25-2009, 05:10 AM
Registered User
Join Date: Jan 2008
Location: Melbourne Australia
Posts: 834
There is a vacuum leak somewhere behind the heater controls.
Ned, If you in Australia, here's some info for you.

(a) Go to and ask your questions there. Oz specced cars are slightly different from Euro and U.S. models.

(b) Watch out in Glenrowan
Reply With Quote
Old 12-25-2009, 07:02 AM
Registered User
Join Date: Dec 2009
Location: Sydney Australia
Posts: 29
Bewdy mate, thanks for that. This is the MB Aust guys isn't it? I got some gear from them the other day, great bunch of guys. I registered on the site but my activating email hasn't come through yet, perhaps a christmas shut down thing?
Reply With Quote
Old 12-26-2009, 11:35 AM
Registered User
Join Date: Jul 2001
Posts: 898
I would guess that the whirr is from the idler pully on the belt tensioner. I had a similar situation on an '88 300E. New pully fixed it.

Chris W.
Reply With Quote
Old 12-27-2009, 04:36 PM
Registered User
Join Date: Dec 2009
Location: Sydney Australia
Posts: 29
Thanks for that, i'll check it out when it stops raining. It's a pretty loud whirr and i am now starting to think it may be the PS pump. Are these a difficult/costly thing to replace? My engine is an M103 and the pump has that silver cylinder resevoir if that helps identify it.
Reply With Quote
Old 12-28-2009, 01:37 AM
mak mak is offline
Join Date: Jul 2006
Location: Westfeld .
Posts: 687
AS mentioned above Most likely its the belt tensioner pulley on a failing tensioner .As the rubber in the tensioner collapses the pulley runs askew and the bearings fail . yes its quite loud and ominous sounding.suggest replacing the belt as well due to one side wear it causes
Reply With Quote
Old 01-03-2010, 04:21 AM
Registered User
Join Date: Dec 2009
Location: Sydney Australia
Posts: 29
Hmmmm, i had a look at this wheel and it seems to run straight. The sound is quite a definate whrrr that reacts to engine speed. Man I hope it isnlt anything expensive!!!???
Reply With Quote
Old 01-03-2010, 09:12 AM
Registered User
Join Date: Dec 1999
Location: Utrecht, the Netherlands
Posts: 383
The easiest way to find the source of the noise is to use a car stethoscope.
They are very cheap, just a few $.

Do not use screwdrivers or sticks, if you hold them to your ear you can’t see if they touch a moving part!

Be very careful, don not touch anything moving!!
And of course do not wear any loose clothing, scarf’s etc!!!!!!!


Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 03:25 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page