post #1 of Old 08-01-2009, 10:47 PM Thread Starter
KevinM90
Registered User
1998 XJ Cherokee 
 
Join Date: Jul 2008
Location: Maine
Posts: 262
Overheating at idle..

Motor is a 5.2 v8
So about a month back my water pump went, pissing anti freeze all over the place. I replaced that and it worked fine for about 3 weeks. Then It started running very hot again, so first I tried the thermostat. That didn't do too much. Then this past week I was pulling in to work and it was running about 220 degees, so i parked as soon as possible, and at that point anti freeze was blowing out everywhere again. I replaced the radiator, and its been alright since, but it seems like if I drive for a while, then stop to go do something with the truck idling, the temps start to get high. If i am running and moving, it is fine.
I tried searching but the most I could come up with was to replace a fan relay, and I dont have an electric fan, just the belt fan. The only thing left I could think of was a fan clutch? Is there anything else I should be looking for here? I know a bad head gasket will lead to overheating, but It runs cool and fine when moving, so I think I ruled that out, but not sure. Sorry if Im vague, its late at night and Ive had a long day dealing with it.


1996 Jeep Cherokee Sport. 3" lift/31" combo. Some lights. Flowmaster. 5 different horns. Full size spare. No rust. Daily driven. Will be...forever.
KevinM90 is offline  
post #2 of Old 08-01-2009, 11:54 PM
Subie-Jeep
Registered User
2014 MK Patriot 
 
Join Date: Jul 2008
Location: Belgrade,MT
Posts: 164
if its the head gasket your oil/coolant will look "milky".my bet would be fan clutch

2014 Patriot Latitude
2006 GMC Sierra 1500,reg.cab, short box,4x4,mostly stockTraded in
1994 ZJ 2" BB,31" TrXus MT-sold and have regretted it ever since :(
2002 Subaru Impreza 2.5RS w/ too much to list here
1994 Toyota 4Runner-I couldn't destroy it but the rust was making good progress-Traded in.
Subie-Jeep is offline  
post #3 of Old 08-02-2009, 02:40 PM
ratmonkey
R.I.P.
 
ratmonkey's Avatar
1997 ZJ 
 
Join Date: Dec 2006
Posts: 19,793
fan clutch has failed.

run the motor up to temp then shut it off and watch how much longer the fan spins after the motor stops. if it spins more than three times the clutch is shot. ideally it shouldn't spin any more after the motor stops when it's up to temp.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

ratmonkey is offline  
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
Overheating in idle-Radiator fan doesnt start donniejamesrio ZJ Grand Cherokee Forum 3 07-14-2009 09:38 AM
Overheating at idle Jeep@02 ZJ Grand Cherokee Forum 8 06-02-2009 09:54 AM
Overheating while stop/idle shoaba ZJ Grand Cherokee Forum 6 12-29-2008 11:00 PM
Overheating at idle jimperry ZJ Grand Cherokee Forum 2 08-27-2007 12:34 AM
2000 still overheating at idle... adamclinch WJ Grand Cherokee Forum 2 06-17-2004 04:39 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome