[R129 SL] Harmonic damper

[Blake Cameron]

Harmonic balancer failure is a major problem on the late-model M112 320 V6 &
M113 430 & 500 V8 motors, although it's particularly prevalent on the V6.
Mercedes has just issued a recall in April to address the issue.  

 

The problem is that the large rubber ring in the face of the balancer cracks
& swells, and eventually comes out of the pulley.  Up to this point the
failure is progressive.  All hell breaks loose once the rubber comes out
completely.  The balancer may fly apart and when it does, it take out
everything within its path, including the radiator, timing chain cover, and
oil pan.  Just cruise by the E-class or ML-class forums at MBWorld.org.
About 1 out of every 10 or 20 threads discuss harmonic balancer failure.

 

Here is a link to the TSB:

http://www.edsoto.com/files/fsy8a83l-1

 

Blake Cameron 

 

  _____  

From: r129list-bounces at mbcoupes.com [mailto:r129list-bounces at mbcoupes.com]
On Behalf Of George Jenner
Sent: Tuesday, June 14, 2005 1:18 PM
To: SL Mailing List
Subject: Re: [R129 SL] Harmonic damper

 

Adam, I suggest you first take the SL into another mechanic who is certified
in MB engines for a second opinion.  The first mechanic may be exactly right
but you need to verify that before you decide to let someone operate.
Harmonic dampers do not generally become faulty unless the bolt holding it
in place has worked loose. (unlikely).

 

Let us know what you find.

 

George Jenner

 

Motor on........

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