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TEST 4: Using A Chemical Block Tester (Combustion Leak Tester)
For the most part, the 3 previous tests can easily and inexpensively confirm that one or both head gaskets are blown.
But in some cases, the previous 3 tests simply don't pinpoint the problem to a blown head gasket, even though the engine does have a head gasket failure issue.
In these cases a block test has to be performed. And a block test involves using a chemical combustion leak detector to confirm that one or both of the head gaskets have failed.
This is how the combustion leak detector test (block test) works:
- The combustion leak detector tester is filled with a blue liquid chemical (see photo above).
- The radiator cap is removed (you may have to drain some of the coolant in the radiator since this tool needs to ‘gulp’ some of the air inside the radiator).
- The engine is started.
- The tester is then placed on the open radiator neck.
- The rubber bellow is then squeezed to suck in the air up through the two fluid-filled chambers. As the air bubbles up through the fluid, it will cause a chemical reaction.
- If the blue chemical turns yellow (for gasoline engines), then combustion gases are entering the radiator. This in turn confirms a blown head gasket, a cracked block, or a cracked cylinder head issue.
- If the blue chemical doesn't change color, then you can conclude that you don't have a blown head gasket, a cracked block, or cracked cylinder head issue.
You can shop for a block tester here:
More 3.3L V6 Buick, Oldsmobile Tutorials
You can find a complete list of 3.3L V6 Buick and Oldsmobile tutorials in this index:
Here's a small sample of the tutorials you'll find in the index:
- How To Test Engine Compression Test (3.3L V6 Buick, Oldsmobile).
- What Does The MAF Sensor Do? (3.3L V6 Buick, Oldsmobile) (3.3L V6 Buick, Oldsmobile).
- How To Test The Throttle Position Sensor (3.3L V6 Buick, Oldsmobile).
- How To Test The MAF Sensor (3.3L V6 Buick, Oldsmobile).
If this info saved the day, buy me a beer!
