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CYLINDER COMBUSTION PRESSURE LEAKAGE DIAGNOSIS CHART CONDITION POSSIBLE CAUSE CORRECTION AIR ESCAPES THROUGH Intake valve bent, burnt, or not Inspect valve and valve seat. AIR ESCAPES THROUGH Exhaust valve bent, burnt, or not Inspect valve and valve seat. AIR ESCAPES THROUGH Head gasket leaking or cracked Remove cylinder head and inspect. MORE THAN 50% LEAKAGE Head gasket leaking or crack in Remove cylinder head and inspect. MORE THAN 25% LEAKAGE AND Stuck or broken piston rings; Inspect for broken rings or piston. STANDARD PROCEDURE REPAIR DAMAGED OR WORN THREADS CAUTION: Be sure that the tapped holes maintain the original center line. Damaged or worn threads can be repaired. Essentially, this repair consists of: • Drilling out worn or damaged threads. • Tapping the hole with a special Heli-Coil Tap, or equivalent. • Installing an insert into the tapped hole to bring the hole back to its original thread size. FORM-IN-PLACE GASKETS AND SEALERS There are numerous places where form-in-place gaskets are used on the engine. Care must be taken when apply- There are numerous types of form-in-place gasket materials that are used in the engine area. Mopar T Engine RTV GEN II, Mopar T ATF-RTV, and Mopar T Gasket Maker gasket materials, each have different properties and can not be used in place of the other. MOPAR T ENGINE RTV GEN II Mopar T Engine RTV GEN II is used to seal components exposed to engine oil. This material is a specially designed black silicone rubber RTV that retains adhesion and sealing properties when exposed to engine oil. Moisture in the MOPAR T ATF RTV Mopar T ATF RTV is a specifically designed black silicone rubber RTV that retains adhesion and sealing properties to seal components exposed to automatic transmission fluid, engine coolants, and moisture. This material is avail- HB ENGINE - 3.7L SERVICE INFORMATION 9 - 1079 |