Fan issue any help appreciated
Thread Starter
Junior Member
Joined: Sep 2011
Posts: 98
Likes: 0
From: RI
Year: 96
Model: Cherokee
Engine: 4.0 baby
so lately on the first start of the day my fan has a hard time to get moving and makes a very loud screeching noise almost sounds like metal hitting metal and after a few min it gets going and is fine BUT this occurs only on the first start for the rest of the day its fine...so lost
Old fart with a wrench
Joined: Nov 2010
Posts: 14,398
Likes: 741
From: Manlius, east of Syracuse, NY
Year: 2000 XJ Sport & WJ Laredo
Model: Grand Cherokee (WJ)
Engine: 4.0L
If you're talking about a clutch fan, the problem is self explanatory. Replace it. BEFORE it comes apart!
Seasoned Member
Joined: Jun 2011
Posts: 319
Likes: 3
From: Key Peninsula, WA
Year: 1997
Model: Grand Cherokee
Engine: 4.0
On my 4.0 ZJ it was a failing water pump. There was enough movement of the belt pulley that it rubbed against the timing cover making the metal rubbing sound.
Old fart with a wrench
Joined: Nov 2010
Posts: 14,398
Likes: 741
From: Manlius, east of Syracuse, NY
Year: 2000 XJ Sport & WJ Laredo
Model: Grand Cherokee (WJ)
Engine: 4.0L
On my 97 4.0 the water pump was making a rattling sound and there was so much looseness in the shaft bearing that the impeller was hitting the cylinder barrel inside. When I replaced it, there was a bright ring marked on the barrel where it was hitting it. THAT'S why I like steel impellers on my pumps.
Thread Starter
Junior Member
Joined: Sep 2011
Posts: 98
Likes: 0
From: RI
Year: 96
Model: Cherokee
Engine: 4.0 baby
thanks for the help but to be honest im pretty puzzled even the last two days it hasnt happened on the first start,but like i said a cpl days prior a few mornings in a row when i started it up i popped the hood and the fan had a hard moving at first and made the terrible noise as well,once the fan got going the noise was gone
Old fart with a wrench
Joined: Nov 2010
Posts: 14,398
Likes: 741
From: Manlius, east of Syracuse, NY
Year: 2000 XJ Sport & WJ Laredo
Model: Grand Cherokee (WJ)
Engine: 4.0L
As I originally said, it's probably the fan clutch. This is not uncommon, especially in the bitter cold. What I did with my Chevy truck was mount an ordinary mechanical fan. There must be someway to lock the viscous clutch part of the fan for now.
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