Valve Clearance - Westerbeke 8.0KW - 60Hz Operator's Manual

ENGINE ADJUSTMENTS
NOTE:
WESTERBEKE recommends that the following engine adjust-
ments be performed by a competent engine mechanic. The information
below is provided to assist the mechanic.
VALVE CLEARANCE ADJUSTMENT
Make the following adjustments when the engine is cold.
1.
Remove the cylinder head cover.
2. Slightly loosen the cylinder head bolts and retighten them
to the specified torque in the number sequence shown
below. Tightening Torque
65:t4Ib-ft
(88£5
Nm)
02 05
011
FOUR CYLINDER
FRONT
THREE CYLINDER
3. Find top dead center compression position for No.1
piston by using the procedure that follows:
(a) Tum the crankshaft until IDe mark on the crankshaft
puUey is aligned with the mark on the timing gear case.
TDC (TOP DEAD CENTER)
MARK
FOR
NO.1
AND NO.4 PISTONS
TDC MARK FOR
NO.2 AND NO.3 PISTONS
TIMING GEAR
CASE MARK
(b) With No.1 piston at top dead center on the compression
stroke, the rocker arms will not be moved when the
crankshaft is turned approximately 20
0
in both directions.
(c) If the rocker arms move, No.1 piston is at top dead
center on the intake or exhaust stroke. In such a case,
tum the crankshaft 3600 in the direction of engine
rotation again. No.1 piston is now at top dead center on
the compression stroke.
4. Loosen the lock nut for the adjusting screw. With a feeler
gauge inserted between the rocker arm and valve cap,
adjust the valve clearance by turning the adjusting screw.
Make certain to adjust all the valves.
i ",,,.
~
O.25mm
i
'~
.<1:
{O.0098 INCHES)
• ': ,if -
rr
INTAKE & EXHAUST
I '~.~~
~
:t --
~
5.
Install the cylinder head cover.
Head Cover Bolt Torque 2 - 3 It-Ib (0.3 - 0.45 m-ku)
Engines & Generators
34