302 overheating
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New User
Joined: Apr 2002
Posts: 13
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From: Tucson USA
302 overheating
i got a 73 302 engine and it gets too hot. i have replaced the following: thermostat, radiatior, fan clutch with a flax fan, waterpump, bypassed the heater core, radiator fluid, and all hoses. it still gets hot. now, i have not tried eplacing the sensor or checking the guage (they are next on my list). but other than that, is there anything alse i could be missing.
thanks a bunch,
herunar
thanks a bunch,
herunar
Cargo Master
Joined: Jun 2001
Posts: 2,571
Likes: 22
From: Oxford, Indiana
302 overheating
If the guage and sender check out OK, it is possible that you have a blockage in the cooling system, especially if it has not been well maintained over the years. A likely place would be plugged head gasket orifices. You may also be dealing with a blown head gasket or a cracked head.
Post Fiend
Joined: Apr 2002
Posts: 7,157
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From: Central Kali
302 overheating
I would first check with a good mechanical temperature guage. I have heard that blocks that have been bored will sometimes overheat but can't prove it. I had a 302 that would overheat at idle but was ok on the highway. You might check into a better water pump, different ones are out there.
New User
Joined: Apr 2002
Posts: 12
Likes: 0
From: Fort Walton Beach US
302 overheating
I have a 79 F-150 that was doing the same thing. I had replaced the thermostat twice and the water pump once. I flushed it out and no matter what, it overheated. Knowing it couldnt be overheating, I replaced the gauge regulator on the back of the dash unit. Believe it or not that was all it was. All that work for a $9.00 push-on regulator.
Senior User
Joined: Nov 2001
Posts: 294
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From: Calgary Canada
302 overheating
I alway test a thermostat before I put it in. I've come across a few that don't work or work marginally. I just put them in a cup of boiling water and make sure they open up.
Other than that I would check the temperature sensor unit that screws into the intake manifold. Make sure it has a good contract between the threads for ground. Don't put teflon tape on the threads or it won't work right.
The other thing I have experience with is a blown head gasket that will cause overheating. You can tell if your coolant gets all foamed up.
Other than that I would check the temperature sensor unit that screws into the intake manifold. Make sure it has a good contract between the threads for ground. Don't put teflon tape on the threads or it won't work right.
The other thing I have experience with is a blown head gasket that will cause overheating. You can tell if your coolant gets all foamed up.
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medicpg
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May 19, 2008 07:27 PM
