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Unread 01-14-2015, 05:23 PM   #1
MattJohnson
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Lost need some help OVERHEATING

OK from the top. Bought a 94 with a 2.5. Dec. 23 Christmas present for wife. The guy I bought it from mostly drove it locally to play in. I drove it a little over 300 miles at around 65 to get it home. Drove it a couple more days and noticed that it was overheating on me. First step replace thermostat(no good) replace water pump(no good) flushed radiator(no good). At this point I am at a loss so I change oil just because not sure on last time it was done. Nothing out of the ordinary. Start it let it run a little to check for leaks and what not. Pulled the dipstick and guess what I saw a nice milky oil. Pulled the head had it check no cracks just off by 6 thousands. So to recap New water pump, thermoset, head gasket and still overheating...

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Unread 01-14-2015, 05:27 PM   #2
bob8619
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How hot is it getting? What temp is the thermostat?
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Unread 01-14-2015, 05:28 PM   #3
MattJohnson
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All the way past 260. I put in a 195 stat
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Unread 01-14-2015, 05:29 PM   #4
bob8619
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And I'm assuming you verified that its really getting that hot as opposed to the gauge reading incorrectly?
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Unread 01-14-2015, 05:32 PM   #5
Chrisnvegas
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Bet the radiator is clogged.
Can't flush radiators anymore. The EPA made companies remove the only ingredients that worked years ago.

I managed to clean mine using 5 bottles of CLR
Radiator must be removed to do this and if it's old, removing the crap will make it leak.

Look inside and see what the passages look like.
Try to spin the fan. It shouldn't spin more than 1/3 to 1/2 a turn.
Motor off of course.

Don't overheat it unless you want to do the head gasket again.
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Unread 01-14-2015, 05:38 PM   #6
MattJohnson
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Quote:
Originally Posted by bob8619 View Post
And I'm assuming you verified that its really getting that hot as opposed to the gauge reading incorrectly?
The gauge shows hot however the top of the radiator is cold. The top hose to the radiator gets warm but not hot. After driving a short distance I immediately took cap off radiator and coolant is cold.

I have not actually taken temp
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Unread 01-14-2015, 05:42 PM   #7
MattJohnson
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Quote:
Originally Posted by Chrisnvegas View Post
Bet the radiator is clogged.
Can't flush radiators anymore. The EPA made companies remove the only ingredients that worked years ago.

I managed to clean mine using 5 bottles of CLR
Radiator must be removed to do this and if it's old, removing the crap will make it leak.

Look inside and see what the passages look like.
Try to spin the fan. It shouldn't spin more than 1/3 to 1/2 a turn.
Motor off of course.

Don't overheat it unless you want to do the head gasket again.
I have flushed the radiator several times. There was crud "dirt" coming out of it. The radiator appears to be the original. If flushing does not really work is the best bet to change it out?
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Unread 01-14-2015, 05:48 PM   #8
Chrisnvegas
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You can't clean rust and crap flushing anymore. The coolant flush is weak and doesn't work.
You need a new radiator.

I got this radiator free as a product test. I'm impressed.


This is overkill but why mess around.
Do not get one with plastic tanks.

http://www.ebay.com/itm/3-ROW-ALUMIN...b6200e&vxp=mtr
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Unread 01-14-2015, 05:53 PM   #9
bob8619
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I would make sure the thermostat is not faulty before doing anything else. Either run it without and see what it does or test it in hot water. But thats just me, I don't jump into just replacing stuff until I know its necessary.
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Unread 01-14-2015, 05:55 PM   #10
bob8619
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Its either a true lack of flow or the temp gauge is reading hotter than it really is.
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Unread 01-14-2015, 05:56 PM   #11
TahoeT8
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I would replace the fan clutch before the new radiator. I went through everything as you did a year ago. I also put a new temp sender and sensor on it. I even have a new radiator, but it was the fan clutch.
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Unread 01-14-2015, 05:59 PM   #12
bob8619
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Yeah I forgot the fan clutch. Like stated earlier, spin it by hand and see how many times it spins.
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Unread 01-14-2015, 06:04 PM   #13
MattJohnson
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I spin the fan by hand and I don't even get a 1/4 turn pretty sure that is good. also with the top radiator hose off engine running and I have nothing coming out of it. will pull stat out and check again.
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Unread 01-14-2015, 06:09 PM   #14
Chrisnvegas
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Quote:
Originally Posted by bob8619 View Post
Its either a true lack of flow or the temp gauge is reading hotter than it really is.
He warped his head. That's a pretty good indication that it's overheating.
I had to read his first post and decipher...
But it's there.

" I changed oil, nothing out of the ordinary"

then later, it has oil in it and the head had to be resurfaced. Overheat warpage.

I guess helping my teacher wife grade papers improved my ability to read between the lines.
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Unread 01-14-2015, 06:15 PM   #15
bob8619
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I've heard (but never seen myself) that air in the system can stop up the flow as well.
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