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How to know if I have a blown head gasket what is the symptom. 1999 Cadillac deville

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  • Cadillac Master
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Symptoms depend on the location of the leak.
If the leak is between cylinders, gas will pass between them and cause misfires in one or both cylinders. This can be detected with a compression test.
If the leak is to a water jacket, you can get coolant on the exhaust, which can eventually prevent starting due to water hammer. You can tell this by observing excess vapor and coolant smell in the exhaust.
Or, the exhaust gasses can enter the cooling system, which can result in rapid overheating. This can be detected by removing the radiator cap to see if combustion gasses are bubbling out of the cooling system.
With overhead cams, you can get coolant in the oil, or oil in the coolant, or both.
It is also possible but rare to have oil in the cylinders.

If you have any more questions, please let me know.

Posted on Nov 13, 2010

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  • Master
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The following are the most important symptoms with severity:

1. Leaking radiator.
2. Overheating and change of oil to milky appearance.
3. White smoke from exhaust
4. Coolant leaks.
5. Low of compression.
6. Coolant in cylinders.

Posted on Nov 13, 2010

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6ya6ya
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Posted on Jan 02, 2017

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