You need to get a thermostat with a lower temperature so it will open faster. 170 to 180 degrees
Put your thermostat in a pan of hot water. If it's a 180 thermostat then heat the water to 180 to 190, if it opens then it's good if it doesn't open then you have a bad thermostat, get a new one.
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Replace your head gasket, it's probably warped, ,it's a common problem with this engine, check with dealer to see if it's under warranty
No warranty, never ran hot enough to damage
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Is the Cooling system holding pressure? It is possible that the gauge could be wrong or the sending unit could be malfunctioning. I would get a digital heat gun and measure the temperature and make sure that if there is a air bleeder that you bleed all the air out of the system!
Thought maybe blown head gasket, compression check says no. Checked and bled all air pockets. Don't thin gauge is bad. I'm questioning the sending unit. Every thing I can think of has been done or replaced
what happens when warmed up hold the upper rad hose and feel the flow then do cold with thermo and as it warms feel flow as it opens mike
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Flush the radiator?
New radiator and hoses, new water pump 3 different thermostats. Everything's been replaced. Did compression check shows no sign of blown head gasket....no oil water mix, no exhaust condensation. Both on plugs
i don't think its a sending unit because with no thermo it reads ok
mike
Leave the thermo out and give it a short test drive.. make a cold start that way you can watch gauge rise to normal any higher shut down and cool it should not even get to normal should run cooler mike
Thermostat is out. Did run on cold start. Gage did go past mark. Engine light showed it heating up enough
* did not pass the mark! From cold start
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Thermostats come in different temp ratings 180 or 220 . you need a higher rated one that opens larger.
Mike
Tried aftermarket brand, then went back to Dodge place for factory still didn't work
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SOURCE: 2001 Dodge Durango 4.7 automatic . put in new
sadly it sounds like you have a blown head gasket...Does the coolant smell like exhaust? I hope you don't but, everything points in that direction. Try bleeding the coolant system.
SOURCE: 1990 toyota corolla wagon 1.6 liter 5 spd. overheating
you've got a possible blockage in the head or block.
SOURCE: My 3.7 liter 6 V Jeep Liberty (2003) runs hot very
Chek in this order:
1- The water level in the auxiliary deposit.
2- the ventilator, some one have in the center a viscosity licuit that become hard when the temperature increase, if not, the air flow slowly and the water increase the temperature.
3- the valve, this is locate in the return tube from the radiator to the motor, this one regulate the pass of water to maintain the temperature stable.
I hope this help you.
You would need to figure out if it is a cooling problem or something producing extra heat in the engine.
Is the radiator fan pulling enough air thru the condenser and radiator ?
Is the fan coming on and also when the ac is on and when the engine reaches 220 degrees ?
Is it possible the exhaust has a restriction somewhere ?
Disconnect the temperature sending unit wire connector for the gague ( not the one for the computer ) with the key on. The temp hand should stay on cold mark. Next, ground the wire and the temp hand should go to full hot indicating the gague and wiring to it are ok. If ok suspect a faulty temp sending sensor if the cooling system is full and properly bled
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