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B. Rotate the crankshaft 240° (degrees). This puts the #3 piston at the TDC position in it's cylinder.
Adjust the valve clearances for the intake and exhaust valves of the #3 piston at the TDC position in it's
cylinder. Adjust the valve clearances for the intake and exhaust valves of the #3 cylinder.
C.
Rotate the crankshaft another 240°. This puts the #2 piston at the TDC position in its cylinder.
Adjust the valve clearances for the intake and exhaust valves of the #2 cylinder.
Torquing Cylinder Head Bolts
Tighten the cylinder head bolts according to the
sequence shown in the illustration to the right.
Make sure the engine is cold when this is done.
Before applying the specified torque to the bolt,
loosen it 114 to
1/2
of a tum and then apply the
torque. Follow this procedure according to the
numbered sequence shown in the illustration to
the right.
Cylinder Head Bolt Tightening Sequence
Bolts #1,2, and 3, (12 mm socket) 2.0 - 3.0 kg-m (14 - 22 ft-Ib)
Bolts #4,5,6,7,8,9,10, and 11 (14 mm socket) 7.5 - 8.5 kg-m (54-61 ft-Ib)
(Rockershaft Hold Down Bolts - 12 mm socket - 1.5-2.2 kg-m (11-16 ft-Ib)
Valve Clearance Adjustment
II
CAUTION
II
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.
1. Pull off the air breather pipe from the rocker
cover, and take off the cover bolts and the rocker
cover to expose the rocker shaft and valve
assembly.
Mark on
gear case
TDe
mark on
crankshaft pulley
Timing mark
2. Adjust the valve clearances at TDC for each cylinder when they are on their compression stroke.
Remember the engine's firing order is 1 - 3 - 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.
WESTERBEKE GENERATORS
66
I
I
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