Westerbeke 44A FOUR - 35C THREE Operator's Manual page 39

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. Prior to checking valve clearances, re-torque the cylinder
head hold down bolts. This is done by by slightly
loosening the bolt and then
re-ti~htening
the bolt to the
specified torque in the sequence shown·below.
Tightening Torque 65:1: 41b·fl (88:!: 5 Nm)
•
01 03
012 011
FOUR CYLINDER
FRONT
THREE CYLINDER
3. Find top dead center compression position for No.I
piston by using the procedure that follows:
(a) Remove the glow plugs from the engine to ease the rota-
tion of the crankshaft manually to position the various
cylinders pistons at TDC (Top Dead Center.
TDC (TOP DEAD CENTER)
'~
\
I
ROTATION
EARLY MODELS
(b)
Rotate the crankshaft to position #1 cylinder piston at
TDC. The TDC mark on the crank pulley should align
with the timing mark on the gear case. Adjust the valves
for cylinder #1.
(c) Rotate the crankshaft to position the next cylinder in the
engines firing order at TDC of its compression stroke.
Adjust the valves for that cylinder.
(d) Rotate the crankshaft to position the next cylinder in the
engines firing order at TDC. Adjust the cylinders valves
and repeat this procedure until all the cylinder valves are
adjusted .
5. Install the cylinder head cover.
Head Cover Bolt Tor'que 2 • 3 fl·lb (0.3 • 0.45 m-kg)
FIRING ORDER:
3 CYLINDER: 1-3-2
INJECTION TIMING MARKS (7)
4 CYLINDER: 1·3·4·2
21"- 20"·19"· 18"-17"- 16" TDC
\
TDC (TOP DEAD
CENTER)~
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ROTATION
CURRENT MODELS
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Engines & Generators
33