Overheating

Hello I have a 1993 Grand prix.3.1 6cyd auto.136245miles
My car is overheating.I replaced the TStat. water pump.
The car was still overheating.Ok the problem is when I start
The car and let it run for 2-3mins steam come from the
Upper radiator Hose and when I turn off the engine water
Go to the coolant reservoir.About two weeks ago I had to
Remove the Intake manifold gasket.Could that be the problem
Please help

If you are getting steam after only 2-3 minutes then check to make sure the cooling system is full of coolant. It should take a lot longer for the engine to heat up to the point where the engine is hot enough to produce steam. Also check to make sure you don't have air in the system. If you have a radiator cap simply remove it and start the car. Make sure the coolant level is full and then run the car, if there is air in the system the coolant level will drop, refill and it should be fine.

As for where the steam is coming from you may have a loose hose. As for the intake manifold gasket, that could cause the problem but the question that I have is did you change the oil after you changed the gasket? If not change the oil immediately as you have coolant in the oil and it will damage your engine.

If you are getting steam after only 2-3 minutes then check to make sure the cooling system is full of coolant. It should take a lot longer for the engine to heat up to the point where the engine is hot enough to produce steam. Also check to make sure you don't have air in the system. If you have a radiator cap simply remove it and start the car. Make sure the coolant level is full and then run the car, if there is air in the system the coolant level will drop, refill and it should be fine.

As for where the steam is coming from you may have a loose hose. As for the intake manifold gasket, that could cause the problem but the question that I have is did you change the oil after you changed the gasket? If not change the oil immediately as you have coolant in the oil and it will damage your engine.
I checked all the hose's all was fine.I filled the Radiator
And start the car after 3mins it were overheating again.
It was spiting out boiling water from the top radiator.
I called the dealer and was told that it could be the head
Gasket or the head I was told to do a compression check
I did. 100psi is the minimum for this car my were as follow
The #1,3,5,4 were above150psi, And the #2,6 was above120psi
Is that good or do I have a problem I made sure I had all the air
Out of the system.What else could it be???

I checked all the hose's all was fine.

When my old Cavalier was leaking coolant while the car was moving, I couldn't tell if the upper hose was bad. There was absolutely no leak when the car is idling... If you see steam, it must be leaking somewhere; it could also the hose clamps...

Remove and replace the thermostat. It sounds like it is not opening and causing the water in the block to boil. Although 2-3 minutes seems an awful short time for the car to overheat. Also, are you sure the water pump is working? The compression figures you posted are good. Did you see any coolant on the plugs? The only other thing I can think of is that water is not circulating through the heads due to a blockage somewhere. Possibly in the intake area.

Remove and replace the thermostat. It sounds like it is not opening and causing the water in the block to boil. Although 2-3 minutes seems an awful short time for the car to overheat. Also, are you sure the water pump is working? The compression figures you posted are good. Did you see any coolant on the plugs? The only other thing I can think of is that water is not circulating through the heads due to a blockage somewhere. Possibly in the intake area.
The car has a new water pump and thermostat.And no there were no coolant on the spark plugs.And no coolant in the oil.So It could be a
Blockage Huh????I had removed the intake Gasket for about30mins
And I replace the same intake gasket.The gasket is new I Replaced It
7 months ago.Do you think thats the problem?? :disappoin

The car has a new water pump and thermostat.And no there were no coolant on the spark plugs.And no coolant in the oil.So It could be a
Blockage Huh????I had removed the intake Gasket for about30mins
And I replace the same intake gasket.The gasket is new I Replaced It
7 months ago.Do you think thats the problem?? :disappoin

Thermostats are cheap - they can be bad when they are new right out of the box. Just becaouse something is new, don't rule it out as potentially being bad. If you want to verify that is the cause, when you take it out put it in a pan of water on the stove. Turn the stove on and use a meat thermometer to monitor the water temp and watch the thermostat. If it is a 195 it will probably start to crack open at 180 and be fully open at 200. If the water boils and it isn't open it is bad. BTW, you didn't put it in upside down, did you? Does the car have bleed nipples on the motor somewhere. The newer ones do as the motor is higher than the radiator. If it has them, did you bleed the air thru them? On my 2001, there was no way to get the engine full thru the radiator cap without bleeding. As far as blockage goes, your radiator could be full of gunk. The car is 12 years old.

change the stat, and bleed the air out again. RE-post if this doesn't fix it, we'll get deepr into it. I agree with GTP and Jimmy, you can get a bad new stat right out of the box, and make sure you install it with the spring toward the engine.

change the stat, and bleed the air out again. RE-post if this doesn't fix it, we'll get deepr into it. I agree with GTP and Jimmy, you can get a bad new stat right out of the box, and make sure you install it with the spring toward the engine.
Ok I put the tstat in some hot water it's ok, it open 180D.
So I replaced it and I bleed the system for over an hour.
I started the car and its doing the same overheating so I
Let it cool down and I removed the Rad.cap and start
the car and in 3mins it was spiting hot boiling water and steam
Out of the top Rad.???yes I have the stat in right.

I know you said you bled the system, but these cars can be darn near impossible to bleed. Because of how quickly you're getting steam, it sounds as though you still have air in the system. Here is how I bleed these engines. Jack the front of the car up so that the radiator cap is higher than the engine. Leave the t-stat and housing off, and s-l-o-w-l-y fill through the radiator until coolant comes out the intake where the t-stat should be. Now install the t-stat and housing, and remove the small hose at the transfer tube where hooks to the engine (leaving the rubber hose hooked to the transfer tube). Crack the bleeder at the t-stat housing, and insert a small funnel into the hose on the transfer tube that you disconnected from the engine. Again, s-l-o-w-l-y add coolant through the transfer tube until it comes out the bleeder at the t-stat, then close the bleeder. Continue to add coolant until it comes out the pipe on the engine where the hose you're filling through attaches. Hold your thumb over the pipe, remove your funnel, and quickly re-attach the hose to the engine, doing your best to not let air in or too much coolant to escape. Finish filling the radiator, replace the cap, and fill the coolant reservoir. Start the engine an let it run until it gets warm, (set the heater to hot so coolant circulates through the heater core also). After the engine starts to warm up, crack the bleeder at the t-stat to see if any air/steam escapes. if not, you're done. If it does, keep working the bleeder until no more air escapes. Good Luck!

I know you said you bled the system, but these cars can be darn near impossible to bleed. Because of how quickly you're getting steam, it sounds as though you still have air in the system. Here is how I bleed these engines. Jack the front of the car up so that the radiator cap is higher than the engine. Leave the t-stat and housing off, and s-l-o-w-l-y fill through the radiator until coolant comes out the intake where the t-stat should be. Now install the t-stat and housing, and remove the small hose at the transfer tube where hooks to the engine (leaving the rubber hose hooked to the transfer tube). Crack the bleeder at the t-stat housing, and insert a small funnel into the hose on the transfer tube that you disconnected from the engine. Again, s-l-o-w-l-y add coolant through the transfer tube until it comes out the bleeder at the t-stat, then close the bleeder. Continue to add coolant until it comes out the pipe on the engine where the hose you're filling through attaches. Hold your thumb over the pipe, remove your funnel, and quickly re-attach the hose to the engine, doing your best to not let air in or too much coolant to escape. Finish filling the radiator, replace the cap, and fill the coolant reservoir. Start the engine an let it run until it gets warm, (set the heater to hot so coolant circulates through the heater core also). After the engine starts to warm up, crack the bleeder at the t-stat to see if any air/steam escapes. if not, you're done. If it does, keep working the bleeder until no more air escapes. Good Luck!OK I done all the above and Steam are still coming out the car is still running hot.I bleeded the system again.But I nottice Everytime I open the bleeding Bolts the water flows though the Rad.good
But when I close them it stops Flowing??That could that be.l

OK I done all the above and Steam are still coming out the car is still running hot.I bleeded the system again.But I nottice Everytime I open the bleeding Bolts the water flows though the Rad.good
But when I close them it stops Flowing??That could that be.l
Help Please car is still steaming :disappoin :disappoin Also When I use the jump wire to check the codes both of the fan's come on.Under Hood??what could that be :screwy: