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Teknikimobil.com-Teknisimobil will continue discussing cooling system problems that occur in car engines, namely the presence of exhaust gases in the coolant.
In the previous article we discussed cooling system problems, namely the pressure test of the cooling system. Namely, the aim is to find out cooling system leaks that occur in the car engine.
Exhaust gas in the coolant
Cylinder head gasket leaks will not always be identified using a cooling system pressure test. Another meaning of the test for exhaust gas leaks in the cooling system is the combustion chamber leak test. Or also called block check tester.
Using a combustion chamber leak test to check for combustion chamber leaks into the cooling system©youtube
A test air sample in the radiator water filling hole is carried out to determine combustion chamber leaks into the cooling system. Unlike a pressure test, a combustion chamber leak test is carried out when the engine is running. Carbon monoxide (CO) exhaust gas in the radiator will change the color of the liquid in the test equipment. CO is produced from the combustion chamber along with other combustion residues, so the test equipment will not work if a spark plug leak in the cylinder does not occur.
If the compression is too low or if coolant enters the cylinder, the spark plug will not fire. So the test equipment cannot read the presence of CO. The block check test can sometimes give false readings of the coolant. But it will work well if the cooling water uses pure water.
The bubble in the test tool is pressed repeatedly for 1 minute to push gas into the radiator through the fluid in the test tool.
If the color of the fluid in the test equipment is bluish green and changes to yellow, this indicates a leak in the combustion chamber. If the fluid remains bluish green, the leak is not occurring at that time.
For V-type engines, it is necessary to test using an infrared exhaust analyzer. This test is used to confirm leaks that occur before carrying out repairs to the engine cylinder head.