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Valve Clearance Adjustment: BCG 4.0KW
NOTE: Retorque the cylinder head bolts
before adjusting the engine's valves.
1. Remove the rocker cover and the gasket.
2. Rotate the crankshaft in the normal direction
of rotation and place the No. 1 piston at TDC
(Top Dead Center) on its compression stroke.
AdJustthe intake and exhaust valve clearances
for the No.1 cylinder. Make sure the valves for
this cylinder are closed when this adjustment
is performed.
3. Rotate the crankshaft
360'. The valves for
cylinder NO.2 should now be closed. Nowad-
just the valves for cylinder No.2.
Adjust the intake valves to 0.008 inches (0.20
ADJUST EXHAUST VALVES TO 0.008 INCHES
(0.20 14M)
ADJUST INTAKE VALVES TO 0.010 INCHES
(0.25 14M)
mm), and the exhaust valves to 0.010 inches (0.25 mm) with the engine cold.
4. Replace the rocker cover along with a new rocker cover gasket.
Rocker cover torque: 5.1 -
9.4 Ib·ft (0.7 - 1.3 kg-m)
Valve Clearance Adjustment: BCG 6.5KW
NOTE: Retorque the cylinder head bolts
before adjusting the engine's valves.
1. Remove the rocker cover and the gasket.
2. Rotate the crankshaft in the normal direction of
rotation and place the No.1 piston atTDC (Top
Dead Center) on its compression stroke. Ad·
just the intake valve clearances for the No. 1
and No. 3 cylinders, and the exhaust valve
clearances for the No. 1 and No.2 cylinders.
Make sure these valves are closed when per·
forming this adjustment.
3. Rotate the crankshaft 360° and adjust the No.
2 cylinder's intake and the No.3 cylinder's ex-
haust valve clearances.
Adjust all valves to 0.0071 inches (0.18 mm) with
the engine cOld.
ADJUST EXHAUST VALVES TO 0.0071 INCHES
(0.18
14M)
ADJUST INTAKE VALVES TO 0.0071 INCHES
(0.18
14M)
4.
Replace the rocker cover along with a new rocker cover gasket.
Rocker cover torque: 5.8· 8.7Ib·ft (0.8·1.2 kg·m)
Westerbeke Generators
78
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