replaced radiator, radiator cap and thermostat. still over heating. fan works fine. temp gauge is midway to top and always moving. ready to shoot it. clean oil and water, 180 psi in all cylinders. any help would be apreciated
"Doug" wrote
All air out of system? Water pump turning? Coolant actually moving through rad?
hello, When i remove the radiator cap, the water looks to be moving, i also filled the plastic tank, after 40 minute ride it will over heat, i removed the radiator cap and there was no fluid in the hose the cap is attached to. but the resevoir was still full. Its like the system is not drawing the fluid in to the system. there is no blockage in the small line between radiator cap and resevoit tank. thanks for your time.
Under what conditions does it overheat? How's the water pump? Do you have the proper coolant mix? How's the coolant level? How are the hoses to and from the radiator? With some more details, maybe someone can point you in the right direction.
------------ Alex
WAG ( wild assed guess ) for OP: check to make sure you didn't put the thermostat in backwards.
Lg
first a little history, new radiator 50/50 mix, new radiator cap, new hoses, new thermostat,no water in oil, or viceversa and all cilibnders are 180 to 185 psi.I test ran with out the thermostat. temp gauge was about a third way up for a 40 minute ride. when I got back there was a full tank in resevoir, and when i removed the radiator cap the hose was empty, so I am losing fluid during driving. I rented a pressure tester and will soon give the results. i am concerned about the little air bubbles when idling with out the radiator cap.My question is, could the head gasket be blowing by into the radiator system, creating pressure that would push the coolant in to the resevoir tank, which is always full and cause it to dump out the over flow during driving.
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seems like a possibility to me. How many ways can a car screw up? Let me count them ( later ).
The closed loop circulation system in theory isn't all hard to figure out. What happens to it in the real world is another story. If you have bubbles in your coolant, ( presuming this isn't PLAIN WATER which boils at 212 degrees Fahrenheit at Mean Sea Level ( i.e. 1 atmosphere = 14.x psi )...IF YOU HAVE ANTIFREEZE IN THERE which raises the boiling point and lowers the freezing point, and this is NOT PLAIN WATER, then bubbles in the coolant is a sign of a breach of the cooling system somewhere along the line. It could be what you say...a head gasket leaking fumes into a cooling jacket, or something else.
I wouldn't quite shoot the critter yet, until I find out what is wrong with it and how much it costs to repair. Your cylinder compression tests don't mean there isn't a leak. Just not a very big one. At this point, it could be a lot of things. Not being familiar with your particular vehicle isn't helping me either.
Lg
If the coolant reservoir is full and the coolant is down in the radiator after the engines is cold you may have a vacuum leak between the radiator and the reservoir.
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the engines is cold
That might also explain the *bubbles* OP is seeing in his overflow reservoir.
On my car I can't even get to the radiator. It is sealed and covered with shrouds. No way to look directly in there to see what is going on. On the OP's car, I don't know. Bubbles in the overflow bottle is one thing...bubbles in the radiator is quite another.
After all the money the OP has so far invested in this problem ( see top of post ), I sure as heck wouldn't be thinking of tossing the vehicle at this point. Too much invested in it already. Now it is time to find possibly the last of the gremlins. He's close to the goal zone and wants to call of the game. I would keep at it until I got a touchdown. Even if it meant replacing hoses as you suggest.
OTOH, =IF= there is a breach of a head gasket somewhere that is blowing gasses into the cooling jacket, I don't know anymore. I would try replacing the hoses as you suggest before undertaking a major DIY like that. But OP has so much money invested in the vehicle at this point, for a few more bucks, yes, I agree. New rubber hoses are in order...at least between the overflow tank and the radiator. No question this is pocket change compared to what he's already spent on this.
Lg
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