[W126 Coupe] Another AC Problem

[Tom Oelsner]

A day after all these posts I checked my belt and even though the pulley was
tight, the belt was indeed loose.  So I tightened it and the noise went
away.  2 days ago the noise came back and sure enough, the belt was loose
but the pulley was tightened down.  So I tensioned the belt again and the
noise went away.  Has anybody ever experienced this before?
Tom

-----Original Message-----
From: mbcoupes-bounces at mbcoupes.com
[mailto:mbcoupes-bounces at mbcoupes.com]On Behalf Of Mike R.
Sent: Monday, September 05, 2005 10:29 PM
To: 'Mercedes Coupes Mailing Lists'
Subject: RE: [W126 Coupe] Another AC Problem


Tom,
Check the belt on the AC compressor anyway. It could be loose and that's
what you're hearing. Mine is tight enough to play tunes on it.

Later,
Mike R.
(702) 494-8056

-----Original Message-----
From: mbcoupes-bounces at mbcoupes.com [mailto:mbcoupes-bounces at mbcoupes.com]
On Behalf Of Tom Oelsner
Sent: Monday, September 05, 2005 8:28 PM
To: mbcoupes at mbcoupes.com
Subject: [W126 Coupe] Another AC Problem

A couple of weeks ago, with the help of a number of people here providing
information, I got my AC running again.  I replaced the O rings behind the
compressor and evacuated it (held pressure perfectly), replaced a seized AC
idler pulley and recharged the system using Duracool.  The system has been
running perfectly, until today.  I have put about a 1,000 miles on the car
in the last 2 weeks, about 500 in the last 2 days.  Today, I started hearing
sounds as if bearings are going (or almost like a belt is slipping) but the
AC is still blowing very cold.  I am not convinced that it is a slipping
belt because it only happens when the AC is turned on.  Has anybody
experienced this before or have any suggestions for isolating and
identifying the problem?

Tom Oelsner
560SEC


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