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Unread 07-18-2009, 02:28 PM   #1
in_motion
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1996 XJ Cherokee 
 
Join Date: Oct 2007
Location: Eastside Indy
Posts: 173
just finished major cooling system overhaul, still overheating...

i just finished replacing a block plug, water pump and various hoses on my 95 4-banger. everything works superbly but its still overheating. is this an issue with the thermostat? a deeper problem? i've taken it on a few shake down runs and it overheats after 25 minutes. if i turn the heater on full blast, the warning light goes off.

thanks in advance for your help!

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Unread 07-18-2009, 02:44 PM   #2
lathan888
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if you changed the waterpump you should have gone ahead with the themostat. I would also check the fan clutch. If those dont do the trick then the radiator.
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Unread 07-18-2009, 03:03 PM   #3
xjfever
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I would change the t-stat and radiator cap also. Did you flush the system well? You could have a blockage somewhere. And like stated above if the fan clutch hasn't been changed in a while I would change it also. Is it overheating at idle, or going down the road, or at all times?
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Unread 07-18-2009, 03:28 PM   #4
Paradise XJ
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1990 XJ Cherokee 
 
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Quote:
Originally Posted by in_motion View Post
i just finished replacing a block plug, water pump and various hoses on my 95 4-banger. everything works superbly but its still overheating. is this an issue with the thermostat? a deeper problem? i've taken it on a few shake down runs and it overheats after 25 minutes. if i turn the heater on full blast, the warning light goes off.

thanks in advance for your help!
Major overhaul??

Water pump and some hoses?


Major overhaul:

Flush radiator, heater core, clean out overflow.
T-stat
Water pump
Fan clutch
All Hoses
Heater Valve - replace or omit
Belt

Check e-fan, and a cap.
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Unread 07-18-2009, 08:16 PM   #5
in_motion
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Join Date: Oct 2007
Location: Eastside Indy
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Quote:
Originally Posted by xjfever View Post
I would change the t-stat and radiator cap also. Did you flush the system well? You could have a blockage somewhere. And like stated above if the fan clutch hasn't been changed in a while I would change it also. Is it overheating at idle, or going down the road, or at all times?
i've noticed it at all times, going down the road and at idle sitting at a light. i guess the t-stat will be the next thing to change. thanks all for your responses!
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Unread 07-18-2009, 09:12 PM   #6
xjfever
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That is what I would do, and I would flush the system very well while it is out.
__________________
  1. '95 XJ country edition, 4" coils/3/4" spacers, HD leafs with extra main added in, Ironman adjustable control arms, rough country shackles, aussie locker, JK rubicon shocks, 35" mudder's, soft 8's, cobra cb
  2. Sold'99 WJ limited, 4.7L, 3" IRO lift. Bilstein shocks, JK rubicon wheels, 255/70/17's, carolina driveshaft, IRO adjustable control arms, IRO adjustable A-arm
  3. Sold '00 TJ, 4" lift, rusty's adjustable control arms, skyjacker shocks, rock krawler adj. trac-bar,rugged ridge SYE and RE driveshaft, soft 8's, 35" mud king xt's,XJ HP D30 w/aussie locker, 4:88 yukon gears, hella 500's, rock crusher diff covers
4. 04 Dodge ram 1500 quadcab, yes, it has a hemi.
5. '08 BMW X3, Mods in progress.
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