Duramax LLY – SERVICE PISTON AND CYLINDER BORE SPECIFICATIONS (MM)

NOTE: Cylinders #7 and #8 require 0.013 mm (0.005 in.) additional clearance (piston to bore).

Duramax LLY - CYLINDER BLOCK SERVICE - Cylinder Bore and Piston Measurement
Check surface flatness of the cylinder block deck with a straightedge and feeler gauge (Figure…
Duramax LLY - CYLINDER BLOCK SERVICE - Cleaning
The block can be cleaned with standard parts cleaning equipment. However, if the crankcase and…
Duramax LLY - CRANKSHAFT SERVICE
Clean the crankshaft with solvent and clear the journal oil holes with a wire brush…
Duramax LLY - CYLINDER BLOCK SERVICE - Inspection
Check all of the block surfaces for nicks, scratches, cracks, damaged threads, or evidence of…
Duramax LLY - DIESEL VACUUM PUMP SERVICE
A vacuum pump is used on all diesel models. The pump is located on the…

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