Westerbeke BTDA 15.0 Operator's Manual & Installation Manual page 84

Valve Clearance Adjustment
NOTE: Retorque the cylinder head botts before adjusting the engine's
valves.
I
CAUTION
I
Adjust valves properly
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.
Pull off the air breather
pipe from the rocker
cover, and take off the
rocker cover botts and
the rocker cover to ex-
pose the rocker shaft and
valve assembly.
Position the No. 1 piston
at TOP Dead Center
(TOC) on ITS compression
stroke and adjust the #
1, 2, 3 and 6 valves (see
the illustration to the
right).
PosITion the No. 4 piston
'Wb.en No. 1 c,.llnder 1. at. top d.ead cent.er
at
TOC
of its compres-
When No.4-cylinder 1. at t.op dead oenter
sion stroke and adjust
the # 4, 5, 7 and 8 val- figure 9.11.4: Valve Adjustment Sequence
ves. The valves are num-
bered 1 to 8 from the
front of the engine to the
back.
Adjust each valve's
clearance by inserting a
0.012 inch (0.3 mm)
feeler gauge between the
rocker arm and the valve
stem. Make sure to ad-
just all valves to 0.012
inches (0.3 mm) while the
engine is cold.
15.0KW BTDA
I
L_I
figure 9.11.6:
82
st.",
C"p
Westerbeke Generators