Westerbeke BCD 4.4KW Operator's Manual page 73

Valve Clearance Adjustment: BCD 4.4KW
CAUTION
Adjust the valve clearance when the engine is cold. Valves are adjusted by cylinder in the firing
order of the engine.
Tighten the cylinder head bolts to the specified
torque before adjusting the valves. (See page 69.)
1. Pull off the air breather pipe from the rocker cover, and
take off the rocker cover bolts and the rocker cover.
2. Adjust the valve clearances at TDC (Top Dead Center)
for each cylinder when they are on their compression
stroke (see below). Remember the engine's firing
order is 1-2. You may find that turning the engine's
crankshaft is more easily accomplished when the
engine's glow plugs are removed before the
crankshaft is rotated.
A.
Align the timing mark on the gear case with the timing mark on the crankshaft pulley indicated for
cylinder No.1 (the one next to the three injection timing marks). In this position, the NO.1 cylinder is
at its top Timing Mark while dead center on its compression stroke. Check both intake and exhaust
valve clearances for this cylinder. If the valves have no specified clearance, adjust by means of the ad-
justing screws. Remember to align the timing marks properly; if not, the valve may be pushed up by
the piston, depending on the position of the cam lobe. Be sure to check the valves for this cylinder -
they both should be closed.
B. Next is the No.2 cylinder: Turn the crankshaft clockwise 360
0
to position the TDC mark on the crankshaft
pulley approximately at the position shown in the illustration above. Now adjust the intake and exhaust
valves for cylinder No.2. Be sure to check the valves for this cylinder - they both should
be
closed.
Adjust each valve's clearance by inserting a
0.010 inch (0.25 mm) feeler gauge between the
rocker arm and the valve stem.
Westerbeke Generators
70
ADJUST VALVES TO 0.010 INCHES
(0.25
MMJ