KRYOTEC ENGINE 78 D. CYLINDER HEAD GASKET A cylinder head gasket leak can be located between adjacent cylinders or between a cylinder and the adjacent water jacket. Possible indications of the cylinder head gasket leaking between adjacent cylinders are: • Loss of engine power • Engine misfiring • Poor fuel economy Possible indications of the cylinder head gasket leaking between a cylinder and an adjacent water jacket are: • Engine overheating • Loss of coolant • Excessive steam (white smoke) emitting from exhaust • Coolant foaming CLEANING CAUTION: When cleaning cylinder head and cylinder block surfaces, DO NOT use a metal scraper because the surfaces could be cut or ground. Use ONLY a wooden or plastic scraper. To ensure engine gasket sealing, proper surface preparation must be performed, especially with the use of aluminum engine components and multi-layer steel cylinder head gaskets. NOTE: Multi-Layer Steel (MLS) head gaskets require a scratch free sealing surface. 1. Remove all gasket material from cylinder head and block (Refer to 09 - Engine - Standard Procedure). Do not damage the aluminum head sealing surface. 2. Clean all the engine oil passages. 3. Clean out the cylinder head bolt holes in the engine block. INSPECTION 1. Check the flatness of the cylinder head gasket surface with a straight edge (2) and a feeler gauge (1). 2. The cylinder head must be flat within specification (Refer to 09 - Engine - Specifications). 3. Remove any carbon or varnish deposits from inside of valve guides with a reliable guide cleaner. 4. Inspect the following components and verify that they are within specification (Refer to 09 - Engine - Specifications): • Valve Springs • Valve Seats • Valve Guides • Valves
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