95 cherokee overheating

mossyoaktj · 08-17-2010, 08:40 PM

dad has a 95 cherokee with the 4.0 in it. its been having overheating problems. so far he has replaced thermostat , raditor, good waterpump. he just dropped a good little bit of money and too the head off replaced the head gasket. and.....still the jeep is overheating. any ideas

BiggDaddy · 08-17-2010, 10:34 PM

This sounds simple, but have you checked the anti-freeze? That was the problem with mine, all I had to do was add some green stuff, again and again. Turned out to be a hole in the radiator, but some goop stopped that. Haven't had any problems since.

Good luck!

BiggDaddy

mossyoaktj · 08-18-2010, 02:32 AM

Quote:

Originally Posted by BiggDaddy

This sounds simple, but have you checked the anti-freeze? That was the problem with mine, all I had to do was add some green stuff, again and again. Turned out to be a hole in the radiator, but some goop stopped that. Haven't had any problems since.

Good luck!

BiggDaddy

yea he has also flushed the system as well.

WrenchMonkey · 08-18-2010, 02:37 AM

Fan clutch?

When does it overheat?

Robert

mossyoaktj · 08-18-2010, 06:40 AM

Quote:

Originally Posted by WrenchMonkey

Fan clutch?

When does it overheat?

Robert

fan clutch is good, and it has electrical fans as well. dad says it tends to overheat a lot on the open highway

RuffedUpXJ · 08-18-2010, 09:19 AM

Quote:

Originally Posted by mossyoaktj

fan clutch is good, and it has electrical fans as well. dad says it tends to overheat a lot on the open highway

With it being on open highway, where there is plenty of air flow across the radiator, that the water pump is the suspect since it isn't spinning as fast as running through the gears say hitting 3k or so but only hitting just over 2k. Or you may have a build up some where. POssible take the water pump off and have a look at the veins and make sure nothing spun.

Also, whats over heat to your dad? pinning the gauge or riding at 210?

sarge · 08-18-2010, 11:24 AM

Just last night I had to put a water pump on my sons 94 XJ , it has been over heating sitting in traffic and while flogging it on the trails and yesterday the thing started making all kinds of noise. Turns out the bearings in the water pump were shot....... the water pump was only 3 months old.

mossyoaktj · 08-18-2010, 06:52 PM

to dad overheating is pegged out to the red. but i kno hes removed the water pump and said it looks fine. ill mention it again to him tho about the water pump, the only thing he told me is that the fins looked good and all.

mossyoaktj · 08-18-2010, 07:02 PM

so im on the phone with dad and i have verified that it doesnt over heat while drivin around town just on the highway. his next option is getting the head shaved down.

so is there a chance that the head is slightly off level and letting build-up into the thermostat housing or is it most likely the water pump not spinning to the correct rpms while on the highway

eighty3bronco · 08-18-2010, 08:26 PM

Quote:

Originally Posted by mossyoaktj

hes removed the water pump and said it looks fine.

this scares me. just because it looks "fine" does not mean that it is.

mossyoaktj · 08-18-2010, 10:32 PM

Quote:

Originally Posted by eighty3bronco

this scares me. just because it looks "fine" does not mean that it is.

yea me too. but i dnt want to tell him to replace it and it not be it and still have to mill the head down.

mossyoaktj · 08-18-2010, 10:32 PM

any easy way to tell on the 4.0 if the water pump is workin up to par

WrenchMonkey · 08-19-2010, 12:53 AM

Quote:

Originally Posted by mossyoaktj

hes removed the water pump and said it looks fine...

I can not imagine tearing all the way into it, and not replacing a $25 part.

I mean, I'm cheap. Really cheap.

But I'm really lazy, too.

Robert

mossyoaktj · 08-19-2010, 02:04 AM

being a cheaper route will be a better way to go. and even if it doesnt work atleast you got new parts.

jfiscus · 08-19-2010, 09:50 AM

sounds like a clogged radiator or bad pump.

He did the head gasket w/o having the head checked out? I don't think this is the issue though if the pressures are the within tollerance on the cylinders.

Going down the highway the fans aren't doing much, as more air is flowing through on its own due to wind. And it's not overheating around town in slow driving, so the fans seem to be pushing well. So, I would assume a water pump (or clog somewhere) or a clogged radiator/line. try flushing it again.

tinbeater · 08-19-2010, 09:20 PM

check and see if the fan on the water pump isnt on backwards.
.

94Dodge Truggy · 08-20-2010, 10:05 AM

is this cherokee white with the woody decals in fairfield township? I have seen one being worked on and have wanted to stop by to see what is up.

mossyoaktj · 08-20-2010, 11:32 AM

not dad lives out in moscow in the middle of the boons. the cherokee is dark grey.he hasnt been able to work on it much hes been workin out of town.

8UP · 08-22-2010, 12:13 AM

Did he get the right water pump? Serpentine pumps spin the opposite direction than conventional belt types.

WrenchMonkey · 08-22-2010, 12:38 AM

Quote:

Originally Posted by 8UP

Did he get the right water pump? Serpentine pumps spin the opposite direction than conventional belt types.

Said he looked at it and put it back on, same one as before.

Robert

mossyoaktj · 08-22-2010, 10:28 AM

ok he just flushed the entire system again. new water pump, then flushed again. so we'll see how it goes

GPER · 08-22-2010, 12:38 PM

Quote:

Originally Posted by mossyoaktj

i have verified that it doesnt over heat while drivin around town just on the highway.

Does he has something on the front that is restricting the air flow at highway speeds?????? I know my 8274 winch will do this on the highway if I'm running over 70mph.

WrenchMonkey · 08-22-2010, 11:20 PM

If the tranny was slipping, making the engine run faster/harder at highway speeds than normal, would it cause overheating?

Really don't know, I'm grasping at straws here...

Robert

mossyoaktj · 08-23-2010, 01:07 AM

completely stock cherokee. its just a dd. no the tranny doesnt slip what so ever, the jeep runs superb witht he exception of the over heating. he said after he flushed it and put a new water pump in it its running way cooler than before but i havent heard if it was over heating on the high way any more.

itbrokeagain · 08-23-2010, 09:06 AM

Is this a closed or open system?

08-17-2010, 08:40 PM	#1
mossyoaktj Join Date: Apr 2008 Location: moscow,ohio Posts: 245	95 cherokee overheating dad has a 95 cherokee with the 4.0 in it. its been having overheating problems. so far he has replaced thermostat , raditor, good waterpump. he just dropped a good little bit of money and too the head off replaced the head gasket. and.....still the jeep is overheating. any ideas __________________ UNITED STATES MARINE 99 TJ, locked, long armed, creepy's

08-17-2010, 10:34 PM	#2
BiggDaddy Join Date: Nov 2007 Location: Sidney, Ohio Posts: 52	check anti-freeze? This sounds simple, but have you checked the anti-freeze? That was the problem with mine, all I had to do was add some green stuff, again and again. Turned out to be a hole in the radiator, but some goop stopped that. Haven't had any problems since. Good luck! BiggDaddy __________________ '82 CJ-7, 6" lift, stock axles 258, 35x15.50x15 TSL/SX Rustoleum Gray

08-18-2010, 02:37 AM	#4
WrenchMonkey Mechanical Animal - CORE Member - - Moderator - Join Date: Feb 2008 Location: Beechmont Posts: 1,883	Fan clutch? When does it overheat? Robert __________________ DIRTY DEEDS, DONE DIRT CHEAP Whatever doesn't kill you makes you stranger

08-18-2010, 06:52 PM	#8
mossyoaktj Join Date: Apr 2008 Location: moscow,ohio Posts: 245	to dad overheating is pegged out to the red. but i kno hes removed the water pump and said it looks fine. ill mention it again to him tho about the water pump, the only thing he told me is that the fins looked good and all. __________________ UNITED STATES MARINE 99 TJ, locked, long armed, creepy's

08-18-2010, 07:02 PM	#9
mossyoaktj Join Date: Apr 2008 Location: moscow,ohio Posts: 245	so im on the phone with dad and i have verified that it doesnt over heat while drivin around town just on the highway. his next option is getting the head shaved down. so is there a chance that the head is slightly off level and letting build-up into the thermostat housing or is it most likely the water pump not spinning to the correct rpms while on the highway __________________ UNITED STATES MARINE 99 TJ, locked, long armed, creepy's

08-18-2010, 11:24 AM	#7
sarge Pure Bacon Join Date: Jan 2007 Location: Trenton, Oh Posts: 1,098	Just last night I had to put a water pump on my sons 94 XJ , it has been over heating sitting in traffic and while flogging it on the trails and yesterday the thing started making all kinds of noise. Turns out the bearings in the water pump were shot....... the water pump was only 3 months old.

08-18-2010, 10:32 PM	#12
mossyoaktj Join Date: Apr 2008 Location: moscow,ohio Posts: 245	any easy way to tell on the 4.0 if the water pump is workin up to par __________________ UNITED STATES MARINE 99 TJ, locked, long armed, creepy's

08-19-2010, 02:04 AM	#14
mossyoaktj Join Date: Apr 2008 Location: moscow,ohio Posts: 245	being a cheaper route will be a better way to go. and even if it doesnt work atleast you got new parts. __________________ UNITED STATES MARINE 99 TJ, locked, long armed, creepy's

08-19-2010, 09:50 AM	#15
jfiscus Terrain Stomper Join Date: Feb 2007 Location: Crittenden, KY Posts: 633	sounds like a clogged radiator or bad pump. He did the head gasket w/o having the head checked out? I don't think this is the issue though if the pressures are the within tollerance on the cylinders. Going down the highway the fans aren't doing much, as more air is flowing through on its own due to wind. And it's not overheating around town in slow driving, so the fans seem to be pushing well. So, I would assume a water pump (or clog somewhere) or a clogged radiator/line. try flushing it again.

08-19-2010, 09:20 PM	#16
tinbeater Join Date: Feb 2007 Location: New Richmond Ohio Posts: 266	check and see if the fan on the water pump isnt on backwards. .

08-20-2010, 10:05 AM	#17
94Dodge Truggy EX-Vice President Join Date: Jan 2007 Location: Fairfield, Ohio Posts: 3,048	is this cherokee white with the woody decals in fairfield township? I have seen one being worked on and have wanted to stop by to see what is up. __________________

08-20-2010, 11:32 AM	#18
mossyoaktj Join Date: Apr 2008 Location: moscow,ohio Posts: 245	not dad lives out in moscow in the middle of the boons. the cherokee is dark grey.he hasnt been able to work on it much hes been workin out of town. __________________ UNITED STATES MARINE 99 TJ, locked, long armed, creepy's

08-22-2010, 12:13 AM	#19
8UP Join Date: Oct 2008 Location: 1 Posts: 92	Did he get the right water pump? Serpentine pumps spin the opposite direction than conventional belt types.

08-22-2010, 10:28 AM	#21
mossyoaktj Join Date: Apr 2008 Location: moscow,ohio Posts: 245	ok he just flushed the entire system again. new water pump, then flushed again. so we'll see how it goes __________________ UNITED STATES MARINE 99 TJ, locked, long armed, creepy's

08-22-2010, 11:20 PM	#23
WrenchMonkey Mechanical Animal - CORE Member - - Moderator - Join Date: Feb 2008 Location: Beechmont Posts: 1,883	If the tranny was slipping, making the engine run faster/harder at highway speeds than normal, would it cause overheating? Really don't know, I'm grasping at straws here... Robert __________________ DIRTY DEEDS, DONE DIRT CHEAP Whatever doesn't kill you makes you stranger

08-23-2010, 01:07 AM	#24
mossyoaktj Join Date: Apr 2008 Location: moscow,ohio Posts: 245	completely stock cherokee. its just a dd. no the tranny doesnt slip what so ever, the jeep runs superb witht he exception of the over heating. he said after he flushed it and put a new water pump in it its running way cooler than before but i havent heard if it was over heating on the high way any more. __________________ UNITED STATES MARINE 99 TJ, locked, long armed, creepy's

08-23-2010, 09:06 AM	#25
itbrokeagain Just Empty Every Pocket - CORE Member - Join Date: Feb 2007 Location: Amelia Posts: 1,435	Is this a closed or open system? __________________ 91 fj 80 on 37 Nitto Muds with a 10k winch. Cage and sliders coming soon.