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RE: banshee squealing on 89 200
> My '89 200 has taken to big time squealing upon startup and first
> couple of minutes. I have checked all the belt tensions
> and they seem reasonable. The noise sounds like the air
> conditioner compressor. However, I can not toggle it off
> always by turning off the climate control. It happens
> on turns too sometimes or from startup at a stoplight.
> All new belts were installed this past spring including
> timing. Any thoughts on what is squealing? I have listened
> with the hood up numerous times trying to sort out the source.
> Is this the failure mode for ac compressor bearings?
> Thanks in advance for your help.
It could be that your central hydraulic pump's front seal is leaking at
night and depositing a small amount of Pentosin on its drive belt. This could
take a bit of time to "burn-off" after morning startup. Check to see if any of
your relatively new belts have a shiny/glazed appearance where they contact the
pulleys. I had this problem last Fall/Winter but it was from the coolant line
to the turbo (to the left of the CHP, banjo fitting from coolant neck on head)
leaking at shutdown and causing a small puddle of coolant that would spill onto
my belt during braking and turning. So check that lil' hose there also.
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