Question about 1991 Chevrolet Corsica

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Leaking coolant at intake gasket area but not into oil

Leaking coolant around intake gasket on each end, not into oil, need to replace gasket, price was $400.00, how hard is it to replace I have some mecanical knowledge and tools, where can I get step by step details on this job.

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  • Anonymous Mar 31, 2014

    Head gasket leaking

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$400 is a very good price for it, very long process. Took my mechanic 6 hours on my 99 Malibu, have to remove the head. $700 for my malibu

Posted on Dec 02, 2008

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It is not particularly hard or complicated, but you DO need to know what you are doing. $400 is fair.

Posted on Nov 23, 2014

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You need a chilton book you can get one at Orielly`s auto parts store Auto zone doesn`t have chilton books there the best and they have the most detail. Hope this was helpful.

Posted on Sep 23, 2009

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Losing antifreeze changed thermostat and resivoir cap


Check you oil for signs of coolant contamination. If coolant is present in the oil, you may have a leaking head gasket or intake manifold gasket. If there is no sign of coolant in the oil, the antifreeze could be leaking past the intake gaskets and into the combustion chamber. It could also be a leak that only shows up when the engine is running, and you are losing the coolant as you drive. This kind of leak is very difficult to locate. You will have to look for signs of antifreeze around the upper and lower intake gasket area with a strong flashlight. Also check for signs of leakage at the upper and lower radiator hose connections and the drain valve at the bottom of the radiator. If you smell antifreeze inside the car, check the carpet for dampness caused by a heater core leak. Sounds like a lot of work, but these mystery leaks as I like to call them, can take repeated inspections before you finally locate them. I hope I have been of some help. Good luck and let me know what you find.

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Bet it's either a bad head gasket or intake gasket.
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2 Answers

I just changed the thermostat on 3.4 L 1999 Pontiac Gr Am GT THINKING IT WOULD FIX THE OVER HEATING. But there is white steam coming out the exhaust! The oil is not milky so it's not a head gasket. There's...


Are you adding coolant?
Yes ......means it's going somewhere.
Fill the coolant tank to the top...right to the top....leave the cap off and run the engine.
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The intake gasket is another source of coolant leaks and at this area the coolant can be sucked into the engine and produce a white smoke.
Does the car run rough at the first start in the morning....could be antifreeze burning off in the cylinder or area that was leaking overnight meaning cyl gasket or intake gasket.
Look at the rear head to block area below the exhaust manifold.
Is there any trace of coolant or stains of coolant......yes means head gasket time.
Pressurizing each cyl at a time with air with the valves closed in that cyl will quickly show the location of the bad head gasket with bubbles coming out of the fill tank on the bad cyl (s).
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1 Answer

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2 Answers

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If there is oil inside the coolant liquid that is the head gasket.

Check first if oil can leak into the coolant tank from the cap.

Usually when you get oil into the coolant liquid you have an head gasket problem, do a compression test, or buy the home tester below.

eBay.co.uk Guides - HOW TO TEST FOR A FAILED HEAD GASKET
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