service manual 55a four marine diesel engine - Westerbeke

ENGINE REASSEMBLY
3. Remove the two attaching bolts from the injection pump
pulley.
4. Loosen the tensioner lock bolt so that tension is applied
to the timing belt by the tensioner spring.
5. Tum the crankshaft twice in the direction of normal
engine rotation (clockwise) to equalize tension on the
timing belt.
9. Install the left timing belt cover with its rubber seal.
10. Install the right timing belt cover with its rubber seal.
TIming belt cover bolts tightening torque:
0.7 -1.0 kg-m (5 -7 ft-Ib)
A CAUTION: Do NOT rotate the crankshaft in the
reverse of its nonnal rotation.
6. Tighten the timing belt tensioner lock bolt.
TIming belt tensioner lock bolt tightening torque:
3.2 - 4.7 kg-m (23 - 34 ft-Ib)
Crankshaft Pulley and Torsional Damper
1. Install the crankshaft pulley and the torsional damper
onto the timing belt drive gear with the semicircular
(woodruff) key. Tighten the attachment.
Crankshaft pulley bolt tightening torque:
2.3 - 3.3 kg-m (17 - 24 ft-Ib)
NOTE: When installing the torsional damper onto the timing
belt drive gear, align the mark on the damper with
the knock pin on the gear.
7. Recheck the timing mark positions on the crankshaft,
camshaft pulley and injection pump pulley with the timing
marks on the gear case.
8. Check the timing belt deflection at the position shown in
the illustration.
Standard timing belt deflection (engine is cold):
10.8 -12.9 mm (0.43 - 0.51 in)/10kg (22 Ib)
A CAUTION: If the deflection isn't within the
specification, repeat the procedure from Step 1.
CRANKSHAFT PULLEY
Intake/Exhaust Manifold Assembly
NOTE: For additional information, see the
INTAKE/EXHAUST MANIFOW page.
1. Remove the air intake manifold, clean the two air filters,
then reassemble.
2. Place the intake/exhaust manifold gaskets in position.
3. Install the intake/exhaust manifold in its entirety, and
tighten it to the specified torque.
Intake exhaust manifold tightening torque:
2.2 - 2.7 kg-m (16 - 20 ft-Ib)
Engines & Generators
3S'