[DML] Re: AC compressor whining

["David Teitelbaum" <jtrealty@xxxxxxxxxxx>]

There is a bearing that the A/C pulley rides on so the belt can turn
all the time. In fact the pulley bearing turns whether the A/C runs or
not. It *could* be bad but is not very likely. It would require
special pullers to remove the pulley and bearing and can be done in
the car without disconnecting the compressor. More likely is the
smaller idler pulley bearings are probably bad. They are easily
changed. Make sure when you get the bearings you also get an "O" ring
seal because there is a cover behind one of the bearings and you will
want to replace the seal when the cover falls off when you take one of
the pulleys off.
David Teitelbaum
vin 10757


--- In dmcnews@xxxxxxxxxxxxxxx, "Harold McElraft" <hmcelraft@xxxx> wrote:
> 
> 
> Are you sure it is not the belt that has dried out? This is very 
> common and a dried out belt can really squeal and often has a range 
> of noise. WD40 will last for a while on a belt. Since it stops when 
> you spray up top it is probably not the idler bearings.
> 
> If the Clutch Bearing were bad the noise would stop when the 
> compressor is on. So it is probably not the clutch bearing. If the 
> noise is there when the compressor is off and on it is probably not 
> the compressor either. It is possible that some pieces are coming 
> off the clutch fields behind the pully and causing a rub that goes 
> away with WD40 but, I think it is the belt.
> 
> Harold McElraft - 3354
> 
> 
> --- In dmcnews@xxxxxxxxxxxxxxx, "ryanpwright" <dmcnews_list@xxxx> 
> wrote:
> > 
> > 
> > My AC compressor is whining. Actually sounds like a screaching 
> noise...
> > 
> > - Doesn't matter whether the AC is on or off
> > - Noise varies in pitch with RPM
> > - Noise also comes and goes in same RPM band every time. I can 
> hear it
> > from 1900-2200, 2800-3000, etc.
> > - Spraying WD40 between the pulley and the compressor stops the 
> noise.
> > I have to repeat this every 1 - 2 weeks.
> > 
> > Question: Do I have to replace the compressor, or are there 
> bearings
> > or something else in there that can be repacked/replaced/etc?
> > 
> > If I have to replace the compressor, I might be wise to convert to
> > R-134A. What is involved in this procedure? I have a local A/C shop
> > that I trust enough to do some of this work.
> > 
> > Thank you,
> > 
> > -Ryan








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