Engine VIDEO: Diagnosing Head Gasket Leaks Andrew Markel shows how to test if an issue is truly related to a head gasket leak and not something else. Sponsored by MAHLE. Advertisement ByUnderhood Service Staff Writers on Apr 7, 2017 Advertisement Andrew Markel shows how to test if an issue is truly related to a head gasket leak and not something else. Sponsored by MAHLE. Advertisement In this article:Cylinder Heads, engine, engine sealing, Gaskets, Head Gaskets, Internal Engine, MAHLE Aftermarket Click to comment Electronic: Why Alternators Are Subject To Ripple Voltage Engine: Variable Valve Timing Strategy Engine: The Do’s and Don’ts of Installing Spark Plugs Engine: Serpentine Belt Post Mortem: Why Do Some Belts Fail Advertisement