Merry Christmas and best holiday wishes to all and thanks for the participation so valuable here in helping others.
My issue:
My 2006 Denali with the standard issue 5.3L V8 just developed this abnormal sound which first began after a cold start this AM, but cold here means 60F. After a normal start, the high pitch was pulsing about every 750ms and continued steadily until it finally assumed a constant squeal. The squeal was not loud and would likely be un-noticable in the car with the windows up. With the hood open standing directly in front of the engine bay it was unmistakably noticeable.
I attempted to listen with a screw driver coupled to my ear while touching the case of the left most idler but did not detect the squeal there. I could not safely access the right idler using this test with the engine running. The sound appears to be coming from the center like fan clutch water pulley area. I would really appreciate some diagnostic procedures I could try to isolate the source of the squeal.
A) Is it possible to disconnect the fan clutch and start the car to possible isolate any clutch issues?
B) Is it possible to reroute the belt so that one of the idlers is bypassed then start and listen?
I would appreciate any input in this diagnosis before just replacing parts. I'll need this car for upcoming Christmas visiting and would like to take care of this before.
Thanks indeed!
My issue:
My 2006 Denali with the standard issue 5.3L V8 just developed this abnormal sound which first began after a cold start this AM, but cold here means 60F. After a normal start, the high pitch was pulsing about every 750ms and continued steadily until it finally assumed a constant squeal. The squeal was not loud and would likely be un-noticable in the car with the windows up. With the hood open standing directly in front of the engine bay it was unmistakably noticeable.
I attempted to listen with a screw driver coupled to my ear while touching the case of the left most idler but did not detect the squeal there. I could not safely access the right idler using this test with the engine running. The sound appears to be coming from the center like fan clutch water pulley area. I would really appreciate some diagnostic procedures I could try to isolate the source of the squeal.
A) Is it possible to disconnect the fan clutch and start the car to possible isolate any clutch issues?
B) Is it possible to reroute the belt so that one of the idlers is bypassed then start and listen?
I would appreciate any input in this diagnosis before just replacing parts. I'll need this car for upcoming Christmas visiting and would like to take care of this before.
Thanks indeed!
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