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Q » How do you perform a leak-down test, and what does it tell you about engine condition?
17 Oct, 2025
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A » A leak-down test assesses engine condition by measuring cylinder pressure loss. Connect a leak-down tester to a pressurized air source and the spark plug hole of a warmed-up engine cylinder at TDC. Listen for escaping air to identify issues: air in the intake indicates intake valve leaks, exhaust air suggests exhaust valve leaks, and crankcase air points to worn piston rings. It diagnoses compression-related problems effectively.
17 Oct, 2025
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