1. Clean the engine block cylinder head bolt holes, if required.
Thread repair tool J 42385-107 may be used to clean the threads of old threadlocking material.
2. Spray cleaner GM P/N 12346139, GM P/N 12377981 (Canadian P/N 10953463) or equivalent into the
hole.
3. Clean the cylinder head bolt holes with compressed air.
4. Measure the depth of the cylinder head bolt holes (1-10) and select the correct length bolts as required.
NOTE:
Clean all dirt, debris, and coolant from the engine block cylinder head bolt
holes. Failure to remove all foreign material may result in damaged
threads, improperly tightened fasteners or damage to components.
IMPORTANT:
z
Do not use the cylinder head bolts again. Install NEW cylinder head
bolts during assembly.
z
Do not use any type sealant on the cylinder head gasket, unless
specified.
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The cylinder head gaskets must be installed in the proper direction
and position.
IMPORTANT: First design engine blocks have different drill and tap depths using both
medium length 100 mm (3.94 in) and long 155 mm (6.1 in) M11 cylinder
head bolts. Second design engine blocks use only the medium length 100
mm (3.94 in) bolt with a common drill and tap depth.
2004 Chevrolet Corvette
2004 ENGINE PERFORMANCE Engine Mechanical (Repair Instructions 3 Of 3) - 5.7L - Corvette
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