Torquing Cylinder Head Bolts (358); Valve Clearance (358) - Westerbeke W35B 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.
Torquing Cylinder
~Qad
Bolts (W 358 Three Engine
Tighten the cylinder head bolts according to the sequence
shown. Make sure the engine is cold when this is done.
Before applying the specified torque to the bolt, loosen it
1/4 - 112 of a turn and then apply the torque. Follow this
procedure according to the numbered sequence shown.
Bolts #4, #5, #6, #7, #8, #9, #10 and #11 are tightened
between 83.2 - 90.4 lb-ft (11.5 - 12.5 kg-m) wet.
NOTE:
MJO Head Bolts require a 14mm socket.
M12 Head Bolts require a 17mm socket.
VALVE CLEARANCE ADJUSTMENT
358 THREE ENGINE
Adjust the valve clearance when the engine is cold. Valves
are adjusted by the cylinder in the firing order of the
engine, (1-3-2). Tightening the cylinder head bolts
to
the
specified torque before adjusting the valves (see previous
pages).
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. Remember the engines firing order is 1-3-2. You
may find that tuning the engine's crankshaft is more
easily accomplished when the engine's glow plugs are
removed before the crankshaft is rotated.
3. Align the timing mark on the gear case with the timing
mark pulley indicated for cylinder #1 (the one nest to the
three injection timing marks). In this position, the No.I
cylinder is at its top Timing mark while dead center on its
compression stroke. Check both the intake and exhaust
valve clearances for this cylinder. If the· valves have no
specified clearance, adjust by means of the adjusting
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 as they both should be closed.
4. Next the No.3 cylinder, turn the crankshaft clockwise
240° so the TDC mark for the No.3 cylinder on the front
crankshaft pulley is approximately at the position shown
in the illustration. Adjust the intake and exhaust valves for
cylinder No.3. Be sure to check the valves for this cylin-
der as they both should be closed.
5. Last is
~e
No.2 cylinder, turn the crankshaft clockwise
240° to position the
me
mark on the crankshaft pulley
approximately at the positfon shown in the illustration:
Adjust the intake and exhaust valves for cylinder No.2.
Be sure to check the valves for this cylinder as theyboth
should be closed.
Adjust each valve's clearance by inserting a· 0.010 in
(0.25 mm) feeler gauge between the rocker arm and the
valve stem.
Bolts #1, #2, and #3 are tightened between
47.~
- 57.8 lb-ft
(6.5 - 8.0 kg-m) wet.
•
ENGINE
FRONT
Q<;
TDC MARK
CYLINDER. NO .2
02
0
7
4
0
01
0
0
5
11
6
8
0
0
03
VALVE CLEARANCE ADJUSTMENT
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