trish
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- May 21, 2010
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- Vehicle Year
- 2000
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- hummer
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Another test before doing compression test is if you know that the system is purged completely, then use a coolant pressure tester and crank the engine over or start it and see if the system builds pressure immediately. If it does or you will notice air bubbles in the coolant reservoir while running you may have a bad gasket or a internal crack in head or block.I would say that if you dont want to pull the entire engine apart, run a compression test before removing the heads. Then get the heads off and to a machine shop to have them check it out. If all comes back well go to your local parts store and buy a head gasket set and put it all back together.
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