Be prepared to do multiple pressure tests:
A full complement of tests should pinpoint the water incursion source in maybe an hour.
- Test the entire system, block, pump and manifold all included. If it holds air, the exhaust as the water source is indicated.
- If the first test leaks air, test the system with the water pump disconnected. No leak, the water pump is the problem.
- Still leaking air? Test the manifold by itself, inlet and outlet ports on the top. No air leak points to the block as the problem.
A full complement of tests should pinpoint the water incursion source in maybe an hour.
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