[W126 Coupe] Another AC Problem

[Tom Oelsner]

The pulley didn't rotate and when it was pulled balls were missing from the
bearing and some were distorted/torn up.
Tom
  -----Original Message-----
  From: mbcoupes-bounces at mbcoupes.com
[mailto:mbcoupes-bounces at mbcoupes.com]On Behalf Of Markus Meyer
  Sent: Tuesday, September 06, 2005 8:13 AM
  To: mbcoupes at mbcoupes.com
  Subject: RE: RE: [W126 Coupe] Another AC Problem


        Tom,

        In general belts shouldn't "move" much more than 1/2 an inch or so
when you push down on them. You don't want them too tight or too loose.

        Out of curiosity, how do you know the idler pulley was seized?
Unfortunately this sounds all too similar to an ordeal I had, I can tell you
offline how it got resolved in the end and what the problem was if you are
interested.

        Markus

        --- On Tue 09/06, Tom Oelsner < toelsner at mindspring.com > wrote:


          From: Tom Oelsner [mailto: toelsner at mindspring.com]
          To: mbcoupes at mbcoupes.com
          Date: Tue, 6 Sep 2005 07:43:50 -0700
          Subject: RE: RE: [W126 Coupe] Another AC Problem

          Jason,
          There is definitely not 2 different sets of noises, only 1 which
keeps the
          same pitch regardless of speed. Given that the compressor has not
          historically made noise, is it possible that it should all of a
sudden have
          too much oil in the system?

          How much deflection should I see in the belt to determine if it is
loose?
          Tom

          -----Original Message-----
          From: mbcoupes-bounces at mbcoupes.com
          [mailto:mbcoupes-bounces at mbcoupes.com]On Behalf Of
mavris2 at comcast.net
          Sent: Tuesday, September 06, 2005 6:23 AM
          To: Mercedes Coupes Mailing Lists
          Subject: Re: RE: [W126 Coupe] Another AC Problem


          Tom,

          It could be one that you have too much oil in the system. Yes, it
will cool
          but it may make a horrible noise and possible with higher rpm make
a
          screeching noise like bearings. If your getting two different set
of noises
          then your compressor is shot its way to death.

          Jason

          ----- Original Message -----
          From: "Tom Oelsner"
          To: "Mercedes Coupes Mailing Lists"
          Sent: Monday, September 05, 2005 10:19 PM
          Subject: [Norton AntiSpam] RE: [W126 Coupe] Another AC Problem


          > No, it isn't a grinding noise. Now that I reflect on it, I do
not think
          > it
          > is from the belt. It is definitely rotation related as the noise
          > increases
          > in speed with acceleration.
          > Tom
          >
          > -----Original Message-----
          > From: mbcoupes-bounces at mbcoupes.com
          > [mailto:mbcoupes-bounces at mbcoupes.com]On Behalf Of Shayegan,
Richard
          > Sent: Monday, September 05, 2005 8:32 PM
          > To: Mercedes Coupes Mailing Lists
          > Subject: RE: [W126 Coupe] Another AC Problem
          >
          >
          > Is it like a grinding noise? I started getting that in my system
which
          > has Freeze 12 in it, though I don't know if that's the culprit
since it
          > hadn't worked for 7 years prior. The mechanic said if it still
blows
          > cold not to worry about it.
          > Richard
          >
          > -----Original Message-----
          > From: mbcoupes-bounces at mbcoupes.com
          > [mailto:mbcoupes-bounces at mbcoupes.com] On Behalf Of Tom Oelsner
          > Sent: Monday, September 05, 2005 11:28 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
          >
          >
          > The MB Coupes Website!
          > W126 SEC Mailing List
          > Postings remain property of MB Coupes, L.L.C.
          > The MB Coupes Website!
          > W126 SEC Mailing List
          > Postings remain property of MB Coupes, L.L.C.
          >
          >
          > The MB Coupes Website!
          > W126 SEC Mailing List
          > Postings remain property of MB Coupes, L.L.C.
          >


          The MB Coupes Website!
          W126 SEC Mailing List
          Postings remain property of MB Coupes, L.L.C.


          The MB Coupes Website!
          W126 SEC Mailing List
          Postings remain property of MB Coupes, L.L.C.




----------------------------------------------------------------------------
--

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.pairlist.net/pipermail/mbcoupes/attachments/20050906/1a89b26f/attachment.html