Westerbeke BCGB - Timing Belt Installation Procedures

ENGINE TIMING BELT
Flange Installation
1. Mount the flange so that its side shown by the heavy
arrow in the illustration faces toward the sprocket.
FLANGE
CRANKSHAFT SPROCKET
Crankshaft Bolt Installation
1. Lock the crankshaft.
NOTE: Do not tum the crankshaft.
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WASHER
2. Tighten the crankshaft bolt to the specified torque.
Oil Pump Sprocket Flange Nut Installation
1. Insert the round bar into the plug hole in the left side of
the cylinder block to keep the counterbalance shaft from
turning.
2. Install the oil pump sprocket.
3. Tighten the nut to the specified torque.
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Camshaft Sprocket Bolt Installation
1. Tighten the bolt to the specified torque.
CAMSHAFT BOLT TORQUE 58 - 72 Ft-Ibs (80 -100 Nm)
'SPROCKET BOLT
Tensioner Spring/Timing Tensioner Installation
1. Install the tensioner spring and timing belt tensioner.
2. Hook the tensioner spring onto the bend of the timing belt
tensioner bracket and the stopper pin on the cylinder block.
3. Move the timing belt tensioner as close as possible to the
water pump; temporarily tighten the tensioner nut.
Timing Belt Installation
1. Align the triangular marking on the camshaft sprocket
with a marking on the timing belt rear cover.
2. Align the notch in the crankshaft sprocket flange with the
marking on the front case.
3. Align the triangular marking
on the oil pump sprocket
with the marking on the front case, and then insert a 2.56 in.
(65 mm.) or longer,
0.31 in (Smm.) diameter round bar into
the plug hole in the left side
of the cylinder block.
MARK ON TIMING
BELT REAR COVER_~
TRIANGLE MARK ON
CAMSHAFT SPROCKET
TIMING BELT
~"d.~:t=~'=='--" TRIANGLE MARK .
NOTCH IN CRANKSHAFT
SPROCKET
MARK ON FRONT CASE
Engines & Generators
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