1986 240 DL Squealing

mhgreen · Post by **mhgreen** » 26 Jan 2015, 21:08

Belts are all new. I suspected the power steering pump pulley, but I replaced the pump with one from a friend and no change. The squeal is constant during idle, upon acceleration. It does not change pitch at all… just constant. Any thoughts?

Matt

93Regina · Post by **93Regina** » 26 Jan 2015, 22:11

mhgreen wrote:squeal is constant...It does not change pitch at all… just constant.

Power off the radio and interior-fan.

mhgreen · Post by **mhgreen** » 26 Jan 2015, 22:14

Ha. I have neither a radio nor a functioning blower motor.

mhgreen · Post by **mhgreen** » 27 Jan 2015, 09:41

I lied. It definitely changes with rpm

Post by **regent** » 27 Jan 2015, 10:56

If no Doctor is among your friends, then you may use a lenght of rubber hose to pinpoint the location of the source with one ear (an ear plug in the other ear is optional).

I am thinking of a bearing. You did the PS pump and belts, what about tensioners, idlers? If those items are new, then the Generator would be a suspect. I am sure the method above will help confirm.

Post by **rgk** » 27 Jan 2015, 14:59

Power steering pump pulley rubbing against tensioner, perhaps? Happened to me.

93Regina · Post by **93Regina** » 27 Jan 2015, 21:01

mhgreen wrote:changes with rpm

I know nothing of your belt setup, but on 93-245, my alternator belts were a pinch loose.

mhgreen · Post by **mhgreen** » 27 Jan 2015, 22:06

A/c compressor is the culprit. Discovered that.