95 lumina overheating problem

[chris_8222]

Originally Posted by cf1

chris... it is not air in the system.. your coolants going into the engine oil.. the head gasket or intake gasket is miss aligned a water jacket mat be coverd.... if your coolant was boiling out it would be a differnt story.. blocked radiator or etc..

you may be right.thats what i was afraid of.lol.i guess ill take it all apart again and see what the heck is going on.thanks for all your help and i will let you know how i make out

[chris_8222]

Originally Posted by cf1

chris... it is not air in the system.. your coolants going into the engine oil.. the head gasket or intake gasket is miss aligned a water jacket mat be coverd.... if your coolant was boiling out it would be a differnt story.. blocked radiator or etc..

i was afraid you would say that i must have messed up when i put it together.iwas hoping it may be something simple but what can you do i guess ill take it apart again and see what is going on.thank you very much for all of your suggestions and ill let you know how i make out.

[cf1]

Originally Posted by chris_8222

i was afraid you would say that i must have messed up when i put it together.iwas hoping it may be something simple but what can you do i guess ill take it apart again and see what is going on.thank you very much for all of your suggestions and ill let you know how i make out.

chris... just take your time with it, the gaskets may be reusable..before you tear it down take out the plugs see if theres coolant on them, if not it may just be the intake gasket misaligned..the head gaskets usuly dont go on the 3.1 or if they do its after you get the engine red hot.. then the head warps....iv got a hunch its the intake gasket...

[chris_8222]

Originally Posted by cf1

chris... just take your time with it, the gaskets may be reusable..before you tear it down take out the plugs see if theres coolant on them, if not it may just be the intake gasket misaligned..the head gaskets usuly dont go on the 3.1 or if they do its after you get the engine red hot.. then the head warps....iv got a hunch its the intake gasket...

what would happen if coolant was going into the intake?would it just get so hot and boil away?if i do use the same gaskets do i put a little bit more silicone than normal?the spark plugs are bone dry.i thought i would check before i sent this.i think you are right and it is an intake gasket.

[cf1]

Originally Posted by chris_8222

what would happen if coolant was going into the intake?would it just get so hot and boil away?if i do use the same gaskets do i put a little bit more silicone than normal?the spark plugs are bone dry.i thought i would check before i sent this.i think you are right and it is an intake gasket.

dont put any silicone on the gaskets, the coolant is going in your oil, did you ckeck the oil?

[chris_8222]

yes i checked the oil and it looks fine and is at the same level as when i filled it.no silicone on the gaskets?the manual says to use a thin bead on the intake gaskets.why should i not use any?

[cf1]

Originally Posted by chris_8222

yes i checked the oil and it looks fine and is at the same level as when i filled it.no silicone on the gaskets?the manual says to use a thin bead on the intake gaskets.why should i not use any?

not on the gaskets, at the end of the intake only use silicone..

[bburns]

I have the same identical problem. I haven't replaced the head gaskets though. But I have replaced the thermostat and sensor. What is really weird is when I first fixed it it ran fine for a day or so and now if I drive around the block it overheads again just like yours. I am lost as well, bled system etc. And sense you already replaced the water pump and have the same problem I can't see doing that.

If you solved your problem I would be grateful for a reply. If I solve it I will get back to forum. If anyone else has any ideas I would be grateful as well.

I can also be emailed directly at [email protected]

[chris_8222]

Originally Posted by bburns

I have the same identical problem. I haven't replaced the head gaskets though. But I have replaced the thermostat and sensor. What is really weird is when I first fixed it it ran fine for a day or so and now if I drive around the block it overheads again just like yours. I am lost as well, bled system etc. And sense you already replaced the water pump and have the same problem I can't see doing that.

If you solved your problem I would be grateful for a reply. If I solve it I will get back to forum. If anyone else has any ideas I would be grateful as well.

I can also be emailed directly at [email protected]

no i have not solved the problem yet but will let you know sometime next week after i take it apart again.

[chris_8222]

well i took the whole engine apart again and didnt find any cause for the overheating problem.i replaced all the gaskets with new ones not taking any chances.put the engine back together again and it ran fine...for about three or four hours and then started overheating again.i had a mechanic help me put it all back together to make sure i was doing it properly and as far as he could tell everything went well.he lives a long way from me so he was not here when i started the car.i bled the system until absolutly no air came out of either bleeder screw.im at my wits end could this be some sort of sensor?if anyone has any ideas please let me know.

[cf1]

Originally Posted by chris_8222

well i took the whole engine apart again and didnt find any cause for the overheating problem.i replaced all the gaskets with new ones not taking any chances.put the engine back together again and it ran fine...for about three or four hours and then started overheating again.i had a mechanic help me put it all back together to make sure i was doing it properly and as far as he could tell everything went well.he lives a long way from me so he was not here when i started the car.i bled the system until absolutly no air came out of either bleeder screw.im at my wits end could this be some sort of sensor?if anyone has any ideas please let me know.

chris.. after i replaced my intake gasket,,a couple weeks later it started showing hot.. i had to replace the temp sensor unit by the thermostate housing,, but do it when the car is absolutly cold.. also if you are runing water in the engine it will run hoter,, i had to drain it and put antifreeze in...put your hand on the top of the engine, see if its hot..

[chris_8222]

Originally Posted by cf1

chris.. after i replaced my intake gasket,,a couple weeks later it started showing hot.. i had to replace the temp sensor unit by the thermostate housing,, but do it when the car is absolutly cold.. also if you are runing water in the engine it will run hoter,, i had to drain it and put antifreeze in...put your hand on the top of the engine, see if its hot..

well i finally broke down and brought the car to a garage.i hate doing that.lol.they are telling me that there is a crack in the head or ti is warped. i had the heads both pressure tested and machined down.the garage says to take it apart again and if the problem persists it is a cracked block.could this be the problem or should i replace the temp sensor??the garage says exaust is leaking into the coolant building pressure but it is overheating more now then whan the head gasket went in the first place so can it be a crack?if so what can i do?replace the engine ro is therre another way?oh yea the cooling fan does not stay on the whole time the engine is overheating.it seems to be working properly.

[cf1]

Originally Posted by chris_8222

well i finally broke down and brought the car to a garage.i hate doing that.lol.they are telling me that there is a crack in the head or ti is warped. i had the heads both pressure tested and machined down.the garage says to take it apart again and if the problem persists it is a cracked block.could this be the problem or should i replace the temp sensor??the garage says exaust is leaking into the coolant building pressure but it is overheating more now then whan the head gasket went in the first place so can it be a crack?if so what can i do?replace the engine ro is therre another way?oh yea the cooling fan does not stay on the whole time the engine is overheating.it seems to be working properly.

why would you have to tear it down again? if it was a cracked block you would be losing coolant.. you said theres no coolant leaks.. is the engine hot hot or is the temp gauge just showing hot.. i had to put a temp sensor on mine a couple weeks after i replaced the intake, the engine was cool but the gauge showed almost 260...

[chris_8222]

Originally Posted by cf1

why would you have to tear it down again? if it was a cracked block you would be losing coolant.. you said theres no coolant leaks.. is the engine hot hot or is the temp gauge just showing hot.. i had to put a temp sensor on mine a couple weeks after i replaced the intake, the engine was cool but the gauge showed almost 260...

i dont see a coolant leak but there is still compression going into the coolant.the engine is actually hot and the guage says its hot.ive been told to get the heads pressure testedand if they are fine that it is a cracked block.is there any other reason for a compression leak besides a cracked block or a blown head gasket?

[cf1]

Originally Posted by chris_8222

i dont see a coolant leak but there is still compression going into the coolant.the engine is actually hot and the guage says its hot.ive been told to get the heads pressure testedand if they are fine that it is a cracked block.is there any other reason for a compression leak besides a cracked block or a blown head gasket?

you dont have a cracked block or head.. you would be losing coolant... check the top radiator hose with the car runing, see if theres pressure there.. then bleed the air out.. let the car sit over night , then reset the cp. drive it and see what it does..