With the air pressure still applied at the discharge port of
the cylinder head, check for leakage at the discharge
valve cap nuts. No leakage is permissible.
INSTALLING CYLINDER BLOCK
Position cylinder block gasket and block on crankcase
INLET VALVES AND SEATS
according to markings made prior to disassembly. Using
If inlet valve seats show sign of slight nicks or scratches,
cap screws with lock washers, secure cylinder block to
they can be redressed with a fine piece of emery cloth or
by lapping with a lapping stone, grinding compound and
grinding tool. If the seats are excessively damaged to the
extent that they cannot be reclaimed, they should be
Carefully install crankshaft into crankcase.
replaced. The dimension from the top of the cylinder
block to the inlet valve seat should not exceed 0.118 in.
Position a new seal on the rear end cover. Secure end
nor be less than 0.101 in.
cover to crankcase with cap screws and lock washers.
Slightly worn or scratched inlet valves can be reclaimed
by lapping them on a piece of fine crocus cloth on a flat
surface, but it is suggested that new inlet valves be