|
|
Content .. 1572 1573 1574 1575 ..
CYLINDER HEAD OPERATION—CYLINDER HEAD The cylinder head closes the combustion chamber allowing the pistons to compress the air fuel mixture to the cor- DIAGNOSIS AND TESTING - CYLINDER HEAD GASKET FAILURE A cylinder head gasket leak can be located between adjacent cylinders or between a cylinder and the adjacent • Possible indications of the cylinder head gasket leaking between adjacent cylinders are: − Loss of engine power • Possible indications of the cylinder head gasket leaking between a cylinder and an adjacent water jacket are: − Engine overheating CYLINDER-TO-CYLINDER LEAKAGE TEST To determine if an engine cylinder head gasket is leaking between adjacent cylinders, follow the procedures in Cyl- CYLINDER-TO-WATER JACKET LEAKAGE TEST WARNING: USE EXTREME CAUTION WHEN THE ENGINE IS OPERATING WITH COOLANT PRESSURE CAP VISUAL TEST METHOD With the engine cool, remove the coolant pressure cap. Start the engine and allow it to warm up until thermostat If a large combustion/compression pressure leak exists, bubbles will be visible in the coolant. COOLING SYSTEM TESTER METHOD WARNING: WITH COOLING SYSTEM TESTER IN PLACE, PRESSURE WILL BUILD UP FAST. EXCESSIVE Install Cooling System Tester 7700 or equivalent to pressure cap neck. Start the engine and observe the tester’s CHEMICAL TEST METHOD Combustion leaks into the cooling system can also be checked by using Bloc-Chek Kit C-3685-A or equivalent. 9 - 2320 ENGINE - 5.7L SERVICE INFORMATION LX |