Engines - Westerbeke 8.0KW-60Hz Service Manual

· ENGINE ADJUSTMENTS
VALVE CLEARANCE ADJUSTMENT
NOTE: Retorque the cylinder head bolts before adjusting the'
engine
s
valves. See TORQUING TIlE CYLINDER HEAD
BOLTS.
A
WARNING:
Adjust the valve clearance when' the
engine is cOld. Valves are adjusted by cylinder in the tir-
ing order of theenginil. 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 bolts and the rocker cover to expose the
rocker shaft aod valve assembly.
Remove the glow plugs from each of the cylinders to eoable
the craokshaft to be easily rotated by haod to position each
cylinder for valve adjustmeot. _
Valves are adjusted with the cylinder in the piston being
adjusted at Top Dead Center
(TDC)
of its compression
stroke. Each cylinder is adjusted following the engine's firing
order (1-3-2 for WESTERBEKE three cylinder engines).
Valve adjustment beginning with cylinder #1. Rotate the
craokshaft slowly and observe the operation of the valves for
cylinder
#1.
Watch for the intake valve to open indicating the
piston is on it's intake stroke (the piston is moving down in :
the cylinder). Continue to rotate the craokshaft slowly and
look for the intake valve to close. This indicates the piston is
now starting it's compression stroke (the piston is moving up
in the cylinder towards IDC).
Align the IDC mark on the craokshaft front pulley with the
tinting marker on the front gear case cover when positioning
the #1 Piston at IDC of it's compression stroke. Confirm this
by rotating the craokshaft approximately 20 degrees before
and after this point aod.the two
~alves
for.the#lcylinder
should not move. .
\
CYLINDER
HEAD BOi.l'
LoilSENING
SEQUEMtE . .
: Make the following adjustments when the engine is cold.
a. Remove the cylinder head cover.
b. Slightly loosen the cylinder head bolts and retighten themi
to the specified torque in the number sequence shown
below.
,
... 1
""I
c.
cz:;
...
,
TIGHTENING TORQUE 65± 4Ib-!t (80", 5 Nm) ..
4 CYLINDER·
Os 06 01 03
014
()12 ()11
3.CYLINDER
06 01 03
010 09
Adjust the valves in #1 cylinder for both intake and exhaust.
Proceed
to
the next cylinder in the firing order:
Rotate the craokshaft 240 degrees in the normal direction of
rotation and adjust the next cylinder's valves in the fiting
order. Rotate the craokshaft another 240 degrees and adjust .
the valves of the next cylinder in the firing. order.
IT MARK
ON PULLEY
TIMING POINTER
CRANKSHAFT
PULLEY
TIMING MARKS
Adjust each valve's clearance by inserting a
{O.0098 INCHES)
(0.25mm) feeler gauge between the rocker arm and
!he
valve '
stem. Make sure to adjust all valves while t!'e engine is cold.
,O.25mm
(0.0098 INCHES)
INTAKE & EXHAUST
Re-install
the
glow plugs (use anti-sei1Oe compound en the
threads) and assemble the rocker cover and rocker cover
belts. See TIGIITENING TORQUE SCHEDULE in this .
manual.
EngInes & Gilnerators
THREE
; 1 8
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