fan clutch
08-31-2011, 04:50 PM
#1
Junior Member
Thread Starter
Join Date: Aug 2011
Posts: 89
Likes: 0
Received 0 Likes
on
0 Posts
fan clutch
Would a bad fan clutch cause your engine to over heat? My xj on over heats when driving, usually within 15-20mins, but if she's sitting still for 30 or so minutes (that's as long as I've done it) it wont over heat. This is with a/c on as well.
How about a radiator cap?
How about a radiator cap?
08-31-2011, 05:02 PM
#3
Junior Member
Thread Starter
Join Date: Aug 2011
Posts: 89
Likes: 0
Received 0 Likes
on
0 Posts
Well the water pump, t-stat,t-stat housing are new, and everything has been flushed.. and the head isn't cracked.
Im just wondering if the fan clutch or radiator cap could cause it to over heat while DRIVING in about 15-20 minutes.
Im just wondering if the fan clutch or radiator cap could cause it to over heat while DRIVING in about 15-20 minutes.
08-31-2011, 05:26 PM
#4
Junior Member
Join Date: Aug 2011
Location: Denver, CO
Posts: 72
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1999
Model: Cherokee
Engine: 4.0
We've had this happen on another vehicle. The fan clutch wouldn't release, therefore at highway speed it was still engaged instead of freewheeling, blocking some of the airflow. So it got hot on the road but was ok at idle. Definitely worth checking.
08-31-2011, 06:23 PM
#7
Newbie
Join Date: Mar 2011
Location: Reno, NV
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1998
Model: Cherokee
Engine: 4.0L V6
Save some pain. and try another T-Stat. I had major issues and swapped Pump, Fan Clutch, T-Stat, Hoses, & Rad. Mine was still capping when I drove her. Took 2 New T-Stats as one was bad from the box.
What's the condition of the Rad?
What's the condition of the Rad?
Trending Topics
08-31-2011, 06:30 PM
#10
CF Veteran
Join Date: Nov 2009
Location: The Republic of TEXAS
Posts: 8,172
Likes: 0
Received 14 Likes
on
14 Posts
Year: 1998
Model: Cherokee
Engine: 4.0L HO
U've only got 2 cooling system components u haven't replaced..... the fan clutch and the rad. The fan clutch is the easiest to replace of the 2. If it stiil overheats, gotta do the rad. That means another drain/refill.
08-31-2011, 07:10 PM
#11
CF Veteran
Join Date: Mar 2010
Location: Broward County Fl.
Posts: 47,923
Likes: 0
Received 22 Likes
on
22 Posts
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
over heating while driving leans toward a circulation problem ,over heating when sitting leans toward clutch fan issue
08-31-2011, 08:03 PM
#12
CF Veteran
Join Date: Aug 2011
Location: Nor-Cal Coast
Posts: 10,489
Likes: 0
Received 17 Likes
on
17 Posts
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
Not to distract from the good advice you are getting here, but might a head/gasket do just that?
Fill it to the brim, and with the cap off power-brake it a second, and see if it bubbles (or geysers). Two minute test.
Fill it to the brim, and with the cap off power-brake it a second, and see if it bubbles (or geysers). Two minute test.
08-31-2011, 08:11 PM
#13
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,875
Received 1,526 Likes
on
1,238 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Radiator cap hasn't been replaced. It's a $5 part and they wear out. Try it. Fan clutch would cause heating up sitting still, not at speed.
08-31-2011, 08:24 PM
#15
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,875
Received 1,526 Likes
on
1,238 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
A HOLE in the radiator means replacement time. Put a new cap on with it.