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INSTALLATION (1) Install element into housing. tabs. (3) Pry up spring clips and lock cover to housing. CYLINDER HEAD DESCRIPTION The cast iron cylinder head (Fig. 9) is mounted to the cylinder block using ten bolts. The spark plugs OPERATION The cylinder head closes the combustion chamber allowing the pistons to compress the air fuel mixture DIAGNOSIS AND TESTING—CYLINDER HEAD A cylinder head gasket leak can be located between adjacent cylinders or between a cylinder and the Possible indications of the cylinder head gasket leaking between adjacent cylinders are: • Loss of engine power • Engine misfiring • Poor fuel economy leaking between a cylinder and an adjacent water • Engine overheating • Loss of coolant • Excessive steam (white smoke) emitting from exhaust • Coolant foaming CYLINDER-TO-CYLINDER LEAKAGE TEST To determine if an engine cylinder head gasket is leaking between adjacent cylinders, follow the proce- CYLINDER-TO-WATER JACKET LEAKAGE TEST WARNING: USE EXTREME CAUTION WHEN THE VISUAL TEST METHOD With the engine cool, remove the coolant pressure cap. Start the engine and allow it to warm up until 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 PRESSURE BUILT UP, BY CONTINUOUS ENGINE OPERATION, MUST BE RELEASED TO A Install Cooling System Tester 7700 or equivalent to pressure cap neck. Start the engine and observe the CHEMICAL TEST METHOD Combustion leaks into the cooling system can also be checked by using Bloc-Chek Kit C-3685-A or Fig. 9 Cylinder Head—2.5L Engine 1 - BRIDGE 9 - 20 ENGINE 2.5L AN AIR CLEANER ELEMENT (Continued) |