[1] –
Check that cooling system is cool and squeeze top radiator hose to check that system pressure has dropped.
[2] –
[3] – Pressurize system with tester to specification.
[4] – Check for leaks throughout cooling system.
Results
– Pressure should hold to specifications. If pressure decreases, check for leaks. Repair leaks or replace parts as necessary.
– If leakage continues after all external leaks have been stopped, a defective head gasket, cracked block, or cylinder head may be the cause.