over heating issue

tarter6bt

tarter6bt

broke ass
Joined
May 11, 2010
Messages
858
Alright guys I've got a 94 dodge truck in sig. On my last pull or there after i blew the head gasket. I drove it to work since it was my daily drive a few days. Parked it and replaced the head gasket. Those few days I drove it it over heated BUT if I drove 52-53mph or kept it around 1500 rpm it would stay cool and not over heat. Well after I replaced hg everything was fine for bout a month or so I drove back and worth to work 60 mile round trip in that time frame. It started over heating again one morning into work so I changed thermostat and went on. On way home same thing. Next day changed fan clutch. And same thing all over again. I've been driving it easy or not at all for past few weeks. Goin 55 like stated above. And tonight I changed the water pump still same sh!t different day. Im lost at what else it could be. Unless the hg blew again.

Has anyone had this happen before and what was the fix?


Note: when hg was replaced the head was oringed and studs were retorqued 3 times.
 
Are you getting bubbles in the radiator? As for overheating, could the water temp sensor or the gauge be acting up or is it actually getting hot? I have seen where some vehicles need the intercooler pulled off and cleaned out, due to things blocking air flow thru the intercooler and radiator. Do you have your fan shroud still on the truck? Could there of been an air pocket after replacing the head gasket, which caused the overheating? Have you checked the flatness of the head and the block? How long after intalling the o-rings, did the head gasket blow? Need to make sure the depth of the grooves is correct or the o-rings will not get the correct crush and could keep the head gasket from sealing properly.
 
jedeka said:
Are you getting bubbles in the radiator? As for overheating, could the water temp sensor or the gauge be acting up or is it actually getting hot? I have seen where some vehicles need the intercooler pulled off and cleaned out, due to things blocking air flow thru the intercooler and radiator. Do you have your fan shroud still on the truck? Could there of been an air pocket after replacing the head gasket, which caused the overheating? Have you checked the flatness of the head and the block? How long after intalling the o-rings, did the head gasket blow? Need to make sure the depth of the grooves is correct or the o-rings will not get the correct crush and could keep the head gasket from sealing properly.
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Negative on bubbles. Temp sensor was replaced when the head gasket blew.

No debris of any kind on innercooler or radiator. I forgot to add that I replaced radiator as well.

Fan shroud is still on and negative on air pocket.

The head was resurfaced and the deck was surfaced when I first rebuilt motor year or so ago. When the motor was rebuilt the head was o ringed. This last time the head was oringed with the proper wire and all new valves and seals. I don't remember the depth of the Orings I will have to check tomorrow
 
This happened to me I couldn't figure it out minor dirt on my intercooler and radiator. Pressure washed them both anyway and never had a problem since. My vote goes to lack of air flow through radiator. Good luck to ya bud
 
I had a similar issue with a car. I noticed if I lugged the engine on a hill it would overheat. My issue was a warped head. Also after about a 30 minute drive that worked the engine, the coolant system was bubbling. Have you pressure tested your coolant system? Autozone/Oreilly's have a loan a tool to do this.
 
I will also add that if I run the truck up to 80 or better then put truck in neutral and roll it will cool off.
 
Several things it could be, my car did that with the headgasket, if I kept the rpms up and didn't lug it, the cylinder pressure wouldn't lift the head.
 
The studs have a total of 5 retorques. Think they could be getting weak? Also if the the pump timing is to low would this cause heating issues? Just thinking outside the box ya know
 
I would go get a pressure checker from autozone and pump it up and see if it holds. Also you could pull the radiator cap and try to build some boost, while sitting still and see if it starts to bubble out the cap.
 
Well I went ahead and put yet another thermostat in and so far so good. It hasn't been over 190*.
 
Check the old one in a pan of water on the stove with a thermometer in it. If it appears to work ok, you probably still haven't found the issue.
 
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