The belt flaps between the air conditioner compressor and the crank pulley. It makes no difference if the AC compressor is enguaged or not.
It seems to be a function of the idle speed of the engine It flaps at 750 rpm =/- 150. At 600 or 900 it will not flap.
I have replaced the water pump, the alternator, serpentine belt last fall. The problem seemed to be fixed until now.
We have had a cool temperatures for the last few days and the belt flap is almost not existent. I noticed that during the cool weather that the idle RPM is at 600. As the temperature increase to the mid 90's the engine idles at 750 and the belt flap is back.
I have tried a second belt and a replacement belt tightner and found that the flap was more severe with the new Gates tightner.
The flap is independent of whether or not the air conditioner compressor is engaged.
All of the pulley are in-line and no visible wobble even when the belt is flapping.
My parts dealer indicates that he sells quite a few harmonic balancer drive pulleys. Could I have a deteriation of the rummer which is molded into the pulley?
Thanks for your help.
have the same problem?
Monday, July 5th, 2010 AT 10:06 AM