2001 cadillac dhs over heating problem
#11
this sounds like what i went through and later came to the conclusion my gaskets were starting to fail. i had the same issue trying to bleed air out of the system and after 2hours of trying i knew right away it was bad gaskets and later it started to blow white smoke out the exhaust. Good luck i hope you dont have gasket issues but im really sure thats the culprit. Also as you stated in the previous post about using more water than coolant please tell me you didnt do that. if so you most likely did more harm than good. But judging from what you replaced along with constantly getting air in the system its gota be the gaskets.
#12
well now knowing that you ran straight water you most likely have head gasket issues. as far as using the thermogasket ive hear it works but also later ends up failing down the road again. So just keep that in mind.
Just a little added inf about using straight water in a coolant system is ALWAYS a bad idea for a daily driven car. Water boils at 212*F and when water boils it releases air bubbles and creates air pockets in the cooling system and can cause pitting and corrosion on metel surfaces and make holes or weak spots or cracks (cracked heads). Also while the water is boiling it cant get rid of the heat and just keeps getting hotter and the air pockets start having nowhere to go. this is where the COOLANT comes into play. Coolant helps lubricate and keep a thin oily coat on metal surfaces and keeps from corrosion all while raising the BOILING point of water.
So with that being said you would have been better off just buying regular coolant and checking for leaks and then later flushing and using dexcool. Im sure you know this now, but i have run into people who dont understand the cooling system and why we need a mix of water and coolant instead of straight water. The outcome may have been even cheaper and you wouldnt be forking out $300 bucks on snake oil to fix something that could have been prevented. Im not trying to be rude in any way i just hate seeing people cut corners thinking they are saving money and then later find themselves spending 3 times that later on. $13-15 bucks is cheaper than a $3,000 headgasket replacement or for that matter a set of new heads because they cracked under all the heat and stress they were under. Let us know if it turns out to be something else if the Thermogasket stuff doesnt work out.
Just a little added inf about using straight water in a coolant system is ALWAYS a bad idea for a daily driven car. Water boils at 212*F and when water boils it releases air bubbles and creates air pockets in the cooling system and can cause pitting and corrosion on metel surfaces and make holes or weak spots or cracks (cracked heads). Also while the water is boiling it cant get rid of the heat and just keeps getting hotter and the air pockets start having nowhere to go. this is where the COOLANT comes into play. Coolant helps lubricate and keep a thin oily coat on metal surfaces and keeps from corrosion all while raising the BOILING point of water.
So with that being said you would have been better off just buying regular coolant and checking for leaks and then later flushing and using dexcool. Im sure you know this now, but i have run into people who dont understand the cooling system and why we need a mix of water and coolant instead of straight water. The outcome may have been even cheaper and you wouldnt be forking out $300 bucks on snake oil to fix something that could have been prevented. Im not trying to be rude in any way i just hate seeing people cut corners thinking they are saving money and then later find themselves spending 3 times that later on. $13-15 bucks is cheaper than a $3,000 headgasket replacement or for that matter a set of new heads because they cracked under all the heat and stress they were under. Let us know if it turns out to be something else if the Thermogasket stuff doesnt work out.
#13
well now knowing that you ran straight water you most likely have head gasket issues. as far as using the thermogasket ive hear it works but also later ends up failing down the road again. So just keep that in mind.
Just a little added inf about using straight water in a coolant system is ALWAYS a bad idea for a daily driven car. Water boils at 212*F and when water boils it releases air bubbles and creates air pockets in the cooling system and can cause pitting and corrosion on metel surfaces and make holes or weak spots or cracks (cracked heads). Also while the water is boiling it cant get rid of the heat and just keeps getting hotter and the air pockets start having nowhere to go. this is where the COOLANT comes into play. Coolant helps lubricate and keep a thin oily coat on metal surfaces and keeps from corrosion all while raising the BOILING point of water.
So with that being said you would have been better off just buying regular coolant and checking for leaks and then later flushing and using dexcool. Im sure you know this now, but i have run into people who dont understand the cooling system and why we need a mix of water and coolant instead of straight water. The outcome may have been even cheaper and you wouldnt be forking out $300 bucks on snake oil to fix something that could have been preventedh. Im not trying to be rude in any way i just hate seeing people cut corners thinking they are saving money and then later find themselves spending 3 times that later on. $13-15 bucks is cheaper than a $3,000 headgasket replacement or for that matter a set of new heads because they cracked under all the heat and stress they were under. Let us know if it turns out to be something else if the Thermogasket stuff doesnt work out.
Just a little added inf about using straight water in a coolant system is ALWAYS a bad idea for a daily driven car. Water boils at 212*F and when water boils it releases air bubbles and creates air pockets in the cooling system and can cause pitting and corrosion on metel surfaces and make holes or weak spots or cracks (cracked heads). Also while the water is boiling it cant get rid of the heat and just keeps getting hotter and the air pockets start having nowhere to go. this is where the COOLANT comes into play. Coolant helps lubricate and keep a thin oily coat on metal surfaces and keeps from corrosion all while raising the BOILING point of water.
So with that being said you would have been better off just buying regular coolant and checking for leaks and then later flushing and using dexcool. Im sure you know this now, but i have run into people who dont understand the cooling system and why we need a mix of water and coolant instead of straight water. The outcome may have been even cheaper and you wouldnt be forking out $300 bucks on snake oil to fix something that could have been preventedh. Im not trying to be rude in any way i just hate seeing people cut corners thinking they are saving money and then later find themselves spending 3 times that later on. $13-15 bucks is cheaper than a $3,000 headgasket replacement or for that matter a set of new heads because they cracked under all the heat and stress they were under. Let us know if it turns out to be something else if the Thermogasket stuff doesnt work out.
#14
I used the thermogasket product about 4,000 miles ago. It stopped the smoke and overheating issue but for some reason i was still building pressure in the system. At about 208 degrees it would push antifreeze past the cap while driving the car but at idle it would be fine. These motors in my opinion run too hot the thermostat dont open fully till about 218 i believe and the fans dont come on at high speed until 224. I ended up eliminating the fans from the ecm and put my own fan relay with temp sensor that is adjustable .
#15
I used the thermogasket product about 4,000 miles ago. It stopped the smoke and overheating issue but for some reason i was still building pressure in the system. At about 208 degrees it would push antifreeze past the cap while driving the car but at idle it would be fine. These motors in my opinion run too hot the thermostat dont open fully till about 218 i believe and the fans dont come on at high speed until 224. I ended up eliminating the fans from the ecm and put my own fan relay with temp sensor that is adjustable .
#17
the cooling system bleeds itself on the Northstar Cady's. but if you just let the car idle with the cap off for a little bit it will let out the bigger bubbles (carefull not to let the car get to warm other wise it will overflow.). but if the headgaskets are bad you will be beating a dead horse trying to bleed the system.
#20
Hi i am needing some advice on a 2001 deville.it has an overheating issue.we bought the car with 68,000 on it.drove it and began to overheat,so we took it to cadillac and they did the dye test and said it was a blown headgasket so we had them put a new one on. Drove it 300 miles and overheats again. Water pump,thermostat replaced ,twice, purge line is fine,no air bubbles in the line,they say. Still cant figure it out. Someone told me that if the catalytic gets hot and melts partially that it wont throw an engine code right awat but could cause blockage to the coolant system.should i check the back pressure or would that really have nothing to do with it? Also i did put a new radiator in it too. Any help would be appreciated as it is not going back to cadillac as i dont think they know anymore about it now than when they charged 5000 plus to fix it. Thanks, jeep lady