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04-09-2013, 05:55 PM

#28291

NewKindOfClown

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Join Date: Jul 2011

Location: Frederick, MD from Cleveland, OH

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Year: 1993 YJ Wrangler

Engine: 4.0 I6

Quote:

Originally Posted by DESERTXJ206

Sorry to thread jack, but on topic of overheating.

1990 xj 4.0 (W/ open cooling system swap.)

New 195 tstat
New 3 row rad
New waterpump
New hoses
A/c and heater core deleted
New zj clutch fan
Rear of hood raised 1" for cooling
New 16lb cap
Ac condenser removed, (nothing blocking rad)
Electric fan on toggle switch.

Like the previous OP, mine runs fine every season but summer. Az temps from 90-115*f. It can run find on some days and others it can get to 210 and then slowly creep to about 220-230 but even with the electric fan on i cant get the temp down. At stop lights it creeps during those times also.

To clarify, hood vents and spacers do not lower coolant temps. They allow ambient heat to escape the engine bay, and that extends the life of rubber components and sensors.

04-09-2013, 06:07 PM

#28292

DESERTXJ206

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Join Date: May 2011

Location: Glendale,Az

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Year: 1990

Model: Cherokee

Engine: 4.0l 6Cyl

Quote:

Originally Posted by NewKindOfClown

To clarify, hood vents and spacers do not lower coolant temps. They allow ambient heat to escape the engine bay, and that extends the life of rubber components and sensors.

I understand that, I mainly did mine because my exhaust manifold has a crack which emits extra heat in the engine bay making everything hotter. So I did the spacers to help get some of the heat out.

I believe everything being brand new should be what keeps the temps lower. I cant figure out why once i get above 210 it wont cool itself down.

I have bo problem getting to operating temp but on hot days it goes past and doesnt cool itself down. Its starting to do it and its only 90* here, i know in 2 months when its above 110* it will be doing it even worse.

04-09-2013, 06:45 PM

#28293

midwaytek

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Model: Cherokee

Quote:

Originally Posted by 1976Mustang

210 degrees F is the normal operating temp, where is the coolant coming out of? If it's the cap replace it with a 16lb one. If you really want to you can install a 195 degree t/stat.

Maybe a stupid question.. But I noticed I don't have a fan shroud... How detrimental is that? Could that be most of the cause?

04-09-2013, 06:48 PM

#28294

Squid4life

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Model: Cherokee

Can be a big part of it. At speed air is passing the rad. In "drive thru" mode, air is just moving around the fan and not much is pulling through the rad. I imagine you will see an improvement for sure with a shroud!

04-09-2013, 07:01 PM

#28295

NewKindOfClown

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Year: 1993 YJ Wrangler

Engine: 4.0 I6

Quote:

Originally Posted by midwaytek

Maybe a stupid question.. But I noticed I don't have a fan shroud... How detrimental is that? Could that be most of the cause?

Huge difference. Get one.

04-09-2013, 07:03 PM

#28296

midwaytek

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Model: Cherokee

Quote:

Originally Posted by Squid4life

Now I can't even go 2-3 miles WO it over heating... Stuck on Heubner off ramp :/ She's making me mad........

04-09-2013, 07:05 PM

#28297

1976Mustang

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Year: 1992 Cherokee Sport

Engine: Bone-Stock 242

Quote:

Originally Posted by midwaytek

Now I can't even go 2-3 miles WO it over heating... Stuck on Heubner off ramp :/ She's making me mad........

Like Clown said, the shroud will make a HUGE difference. So get a fan shroud and a new radiator cap, then check back with us.

04-09-2013, 07:29 PM

#28298

ScikoFaery

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Year: 2000

Model: Cherokee

Engine: H.O. 4.0L I6

Been reading about the 0331 head problem now im all paranoid that it might b happening to my '00 what with the injector issue and I had to add almost a whole gal of coolant today didnt check the oil tho...im at 70 something k now doubt its warrantied either

04-09-2013, 07:42 PM

#28299

NewKindOfClown

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Location: Frederick, MD from Cleveland, OH

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Year: 1993 YJ Wrangler

Engine: 4.0 I6

Quote:

Originally Posted by 1976Mustang

Like Clown said, the shroud will make a HUGE difference. So get a fan shroud and a new radiator cap, then check back with us.

And test your thermostat to make sure it opens at 190°.

04-09-2013, 07:45 PM

#28300

devilcrawler

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Model: Cherokee

Quote:

Originally Posted by midwaytek

I don't know if that last post went through.. Sorry if this is a copy... I over heated 3 times today.. Last time it dumped all my coolant. And ran like crap till I poured more in. It actually scared me cause I thought I blew the head. But the oil still looks good. Today was the first actual hot day so I know its gonna happen again. Normally yes, it stays around 200 210.. But can I get it so it stays under 200?

check if your electric fan is kicking on.

04-09-2013, 07:48 PM

#28301

devilcrawler

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Model: Cherokee

I have a 95 zj and need to find a radiator from something else that wont hang lower than my bumper. I bust it everytime I take it wheeling. It doesnt have to have a tranny cooler, I have a external cooler.

04-09-2013, 08:54 PM

#28302

midwaytek

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Model: Cherokee

Quote:

Originally Posted by NewKindOfClown

Huge difference. Get one.

Ok.. Replace cap.. Worked a little better.. Now I have a p0740, p0705 and a p0700.. All tranny as you may know... :/ could it be I'm just heating my tranny fluid up to high?

04-09-2013, 08:56 PM

#28303

Sideways99

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Year: 1999

Model: Cherokee

Engine: 4.0

I'm about to pull my front axle to do all the bearings, any pointers to keep this from being a major p.i.t.a.? I have about a week it can be down so I'm not gonna rush it.

04-09-2013, 08:59 PM

#28304

Eagle564

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Year: 1996

Model: Cherokee

Engine: 4.0

My 96 isnt having the electric fan kick on. I was overheating alot at the gas station and in traffic and then at home i watched my temp gauge climb and the fan never came on. Is there a waybto figure out whats wrong? Its worked before which is odd, its like it got too hot and it decided to not work.

Also, whats the temp that he stock tstat comes on? I want to get a new thermostat just for peace of mind and to help cool it.