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  #37  
Old 07-25-2012, 10:48 AM
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Re: 2000 WJ 4.7l Overheating

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Originally Posted by hoffmanestates View Post
tranny cooler might help.... or t stat

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Did the Tstat already only thing I haven't done is the radiator, but still isn't the tranny cooler just covering up the problem?
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  #38  
Old 07-25-2012, 12:26 PM
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could be

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  #39  
Old 07-25-2012, 12:26 PM
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blow.out radiator

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  #40  
Old 07-25-2012, 08:53 PM
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Re: 2000 WJ 4.7l Overheating

If the cooling is ok at lower outside temperatures, but it starts to overheat at higher outside temperatures, the problem indeed seems to be more with the radiator. Did you do a reverse flush of it when the cooling system was empty?
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  #41  
Old 07-25-2012, 09:02 PM
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and blow out the fins. u be surprised what's jambed in.there

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  #42  
Old 07-25-2012, 11:02 PM
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Re: 2000 WJ 4.7l Overheating

I would try a block test (search "block tester" at www.napaonline.com )

I know the ford diesel head gasket issues are when you lean into them, the head bolts actually stretch out and hello problems, then you let it cool down and she runs like a champ.

There is a problem here... Hopefully you can find it.

Is the radiator actually full of coolant? Some people look at the reservior for "coolant level" but it is not uncommon for a failed head gasket to drink all the coolant in the cooling system and not suck coolant from reservior.

Also are you properly bleeding the cooling system? (sorry if this has been asked in the last 3 pages)
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  #43  
Old 07-26-2012, 05:37 AM
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but with head gasket wouldnit be either running rough. oil mixing with coolant.white cloud behind vechicle...the thermostat u installed It have a little jiggle valve at the 12 o'clock position

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Old 07-26-2012, 06:17 AM
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just example how hott mine runs it has a new ambient air temp sensor so 74* should be accurate

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  #45  
Old 07-26-2012, 09:50 AM
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Re: 2000 WJ 4.7l Overheating

To reply to a few questions..

Yes the new t-stat did have a little jiggle valve.

No I have not flushed the system...

As for bleeding the system, I've done all I can can't seem to get any more air pockets out.

The car runs great, no over heating at all yesterday temp outside was 93 in the city, about 85 up the hill and cooled off to 70 degrees by the time I got home. The Jeep according to the gauge ran about 210 to 215 degrees.

Now as for the coolant overflow it is always full, no sign of oil in the system and no loss of coolant in the radiator.

Now for the flush I was planning on taking it in and getting the whole system flushed this weekend. A couple friends have looked at it with me and I'm in agreement that a stop leak was put in the radiator prior to me owning it.
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Old 07-26-2012, 10:04 AM
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Re: 2000 WJ 4.7l Overheating

Eventhough stopleak is a good remedy to get home, i'm not so sure if it is a good idea to keep it in there forever. I would be affraid that it will block small passages as well. I would start with the flush and just put plain water in it for a test. If it all looks fine, then put the right coolant in there.
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  #47  
Old 07-26-2012, 11:00 AM
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typically stop leaj in the radiator is for a head gasket failure remedy... Also consider when someone gets the 2500 dollar repair estimate thats usually when stuff ends up for sale, case in point, literally right now there is one I diagnosed as head gaskets last week is on craigslist advertising all the service that has recently been done with no mention of the headgasket failure.

Also to hoffman... Not always is it that painfully obvious.

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  #48  
Old 07-26-2012, 11:27 AM
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Re: 2000 WJ 4.7l Overheating

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Originally Posted by 2005JGC View Post
typically stop leaj in the radiator is for a head gasket failure remedy... Also consider when someone gets the 2500 dollar repair estimate thats usually when stuff ends up for sale, case in point, literally right now there is one I diagnosed as head gaskets last week is on craigslist advertising all the service that has recently been done with no mention of the headgasket failure.

Also to hoffman... Not always is it that painfully obvious.

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God I hope not. Is there any way to tell? Again it only overheats in hot weather under load (going up steep grade)
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