Question about 1999 Cadillac DeVille

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Can i use thermagasket for my head gasket leak

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No use the regular gasket

Posted on Nov 15, 2009

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Posted on Jan 02, 2017

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Can running a qt oil low cause spike in temperature cool down. Was 222 now 228 and scaring me. Thinking about trying Thermagasket for head leak.


Running one quart of oil will not cause engine to overheat under normal conditions. If you suspect you have a blown head gasket no product such as Thermagasket will fix this problem. You will need a new head gasket installed. A compression test will verify if you indeed have a blown gasket. If you are loosing coolant with no apparent leak, see white smoke from the exhaust, see a grey foamy substance on the underside of the oil fill cap, you probably have a blown head gasket. You need to have this looked at by a professional or you may destroy your engine.

Sep 21, 2011 | 1998 Cadillac DeVille

2 Answers

I believe the head gasket is leaking in my norstar engine, Does thermagasket work in this situation?


Not for very long, but you have nothing to loose.
To test the head gasket, you borrow a pressure tester from a place like Autozone.
It replace the radiator cap, and you pump up to slightly above cap rated psi.
If it does not hold pressure for 5 minutes, you have a leak.
Look for it. It could be water in the oil or out the tail pipe.
If not, then start the engine, get it hot, and water for flutter in the gauge.
If so, then head gasket has compression leak.

Jan 30, 2011 | 1999 Cadillac DeVille

1 Answer

Check engine soon and low coolant lights on


It is critical that you pressure test the system with the vehicle turned off and cooled down. Get a tool from the parts store (they can sell you a used one that you return to them and get a full refund). With the car off and cool you fill your radiator with water and screw on a special radiator cap that comes with the pressure test tool and pump up pressure in the system through that special cap. Then with a bright light you look everywhere for a leak from a hose, the water pump, or the radiator. If it's leaking or leaving stain around the intake manifold that would be a sign of a blown head gasket. A product to help with a blown head gasket is THERMAGASKET available on-line only. You may just have a leaking hose or leak by the thermostat or a leak from the water pump (in which case water pump replacement is the safest option).

Aug 16, 2010 | 1996 Ford Taurus

1 Answer

1997 cadillac deville engine is overheating. can your ''thermagasket kit'', be used on 4.6L northstar 32 valve V8 engine. If so, approximately how long will the treatment last and how much does it cost?


When you say thermagasket kit,I assume you mean one of those silly DIY gasket sealant liquids that you put in the engine.

You should not use these type of products on ANY engine let alone the Northstar.

To cure a headgasket leak, replace the headgasket.....there is no miracle cure.

On the Northstar, you will damage the cooling system,plus you will continue to have issues as time goes on.

How do you know you have a blown head gasket?

Here is something to consider.......

The most common overheating problem with the Northstar engine is a blocked purge line(small hose).The purge line is designed to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank (not the cap) ,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.
If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.
The hose goes in to the engine to a crossover and comes out the other side close to the thermostat housing,the blockage may be there.

May 31, 2010 | 1997 Cadillac DeVille

1 Answer

Will thermagasket work for my 2006 chevy cobalt 2.2 liter?i discivered coolant in 2&3 clyclinders have car misfiring on start up


It can be used as a temporary fix but the head gasket is going to need to be replaced. You also run the risk of pluging up more than just the leaking head like Heater core, Radiator. If you use the Thermagasket make it a short use and flush the cooling system after proper repair has been made

Mar 01, 2010 | 2006 Chevrolet Cobalt

2 Answers

Blown head gasket


Depending on the size of the leak theragasket may work. There are other products that add to the anti-freeze, if it's anti-freeze that is leaking. Some add to the oil. For a temp fix I would and have been able to prolong a head gasket replacement. But it's just a temporary fix. Could last 1 week, 6 months or not at all.
A head gasket replacement is not a easy job, messy if you do it and a little costly if a shop does it. I've been there, Good luck
If you like this advise, please do the rating - Thanks

Oct 17, 2009 | 1988 Ford Escort EXP

1 Answer

Blown Head gasket (1989 Toyota Supra Turbo)


I think you have a bad head gasket too. It's leaking coolant into the combustion chamber. If you pull out your spark plugs one at a time you will find one plug that is very clean. That's because when the coolant vaporizes, it gets the combustion chamber very hot, thus cleaning the plug.

You must replace the head gasket. I would think you could get it done for $1000.00 at an independant shop. Call around to several shops to get estimates.

Mar 01, 2009 | 1989 Toyota Supra

2 Answers

1988 chevrolet s10 blazer 2.8l 4 wheel drive


Well you can buy a new & cheaper car or either you can try to replace the head gasket.

Jun 17, 2008 | 1988 Chevrolet Blazer

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