View Full Version : Front End Noise While Idling
Kahunakai
06-26-2005, 03:40 AM
I have an 02 Trailblazer with 70K Miles. Lately, I've noticed a strange noise while idling and when I shut down the truck. The noise sounds like something is loose, I've checked the pulleys and seem normal. It sounds like it is coming from the fan area but cannot quite detemine. When I turn off the truck it sounds even louder of a vibration of metal to metal. I'd take it to a dealer but like most have experienced it never happens when you want it to happen.
Just want to know if anyone else has ever experienced this problem.
:cool:
Jman423
06-26-2005, 03:45 AM
I have an 02 Trailblazer with 70K Miles. Lately, I've noticed a strange noise while idling and when I shut down the truck. The noise sounds like something is loose, I've checked the pulleys and seem normal. It sounds like it is coming from the fan area but cannot quite detemine. When I turn off the truck it sounds even louder of a vibration of metal to metal. I'd take it to a dealer but like most have experienced it never happens when you want it to happen.
Just want to know if anyone else has ever experienced this problem.
:cool:
No, can't say that I have expienced that, but metal to metal sounds can't be good.. :o
By the way, welcome to the site!!
02EnvoySLE Guy
06-26-2005, 03:46 AM
Hmm... how often does it do that? TBs and Envoys are known for wearing out fan clutch assemblies; perhaps that could be it. I would think though you'd be throwing a code if it was, so it could be some other item in the serpentine chain. :m2:
Kahunakai
06-26-2005, 04:03 AM
Good to find a site where people gcan share info on there vehicles...
Thoughout the 3.5 yrs of a proud owner of my TB, I haven't had any major mechanical problems. (knock, knock, knock..)
The noise doesn't sound like a metal to metal grinding noise, more like a loose nut or bolt.
about 2 years ago, my fan clutch seemed to kick on randomly, cold or hot, weird. Sometimes even at start up. Lost lots of power and lost a lot of gas. Then after about a year after a long drive. It went away and haven't happened since. There isn't an apparent power or performance loss now, my TB runs great, almost as smooth and powerful since day one. I can blame it on scheduled maintenance and lots of sweet talking to my TB. :cool:
Jman423
06-26-2005, 04:05 AM
(knock, knock, knock..)
I think this would be a bad time to reference a sound like that!! :laugh: :D
So is it a rattle, whats the best way to describe the sound?
Kahunakai
06-26-2005, 04:11 AM
My knuckles are hurtn from knockn on wood. :D
02EnvoySLE Guy
06-26-2005, 04:14 AM
about 2 years ago, my fan clutch seemed to kick on randomly, cold or hot, weird. Sometimes even at start up. Lost lots of power and lost a lot of gas. Then after about a year after a long drive. It went away and haven't happened since. There isn't an apparent power or performance loss now, my TB runs great, almost as smooth and powerful since day one. I can blame it on scheduled maintenance and lots of sweet talking to my TB. :cool:
Hmm.... well if nothing was ever done to it aside from scheduled fluid changes, I'd definitely start my looking there then. Maybe the problem you had before is rearing it's ugly head again in a different way. For a truck with 70K miles on it, I wouldn't be that suprised if things start going south. :m2:
Another possible but unlikely cause could be the infamous piston sleeve crackage; is your '02 a very early-build one (built most likely during 2001 some time)? I've heard of a few cases (my truck included from what I've been told) where the problem starts off like what you're describing.