Checking cylinder height

Checking cylinder height

The cylinder height must be checked between the seating face on the crankcase and the top surface and this dimension should be 3.5433 ±0 0 0 6 inch.

If this dimension is less than specified the cylinder must be renewed to prevent possible carbon deposits on the piston crown and underside of combustion chamber causing the piston to strike the cylinder head (see FIG 1:24). Insert a .0079 ± .00197 inch thick oil paper gasket between the crankcase and cylinder bottom face and a .0236 to .0275 inch thick graphitized asbestos gasket between the cylinder and cylinder head. The compression of the gaskets on assembly will eliminate any very small differences between the two mating surfaces.

Inspection of tappet seats

The tappet seats should be checked for scoring and correct clearance which must not exceed .00315 inch. Should the clearance be greater than the maximum specified the seating may be reamed to oversize dimensions as detailed in Technical Data. Tappets are available in .00197 and .00394 inch diameter oversize.