Westerbeke BCGB - Timing Belt Maintenance; Timing Belt Disassembly and Inspection

TIMING BELT DISASSEMBLY
NUMBERS INDICATE THE
SUGGESTED ORDER OF
DISASSEMBLY
TORQUE 7 - 9 Ft-Lbs
10-12Nm
1 TIMING BELT
COVER A
3~CCESS COVER~
TORQUE 7 - 9 FT-LBS
10-12Nm
\
1 o/EAR COVER
i
6 TIMING BELT
TENSIONER
12 CRANKSHAFT
BOLT
13 CRANKSHAFT 10 FLANGE NUT
SPROCKET TORQUE 36 - 40 FT-LBS
[50-56Nm]
TIMING BELT ADJUSTMENT,
INSPECTION AND REPLACEMENT
CAN BE PERFORMED WITH
ENGINE IN THE BOAT
TORQUE 98 - 105 FT-LBS
135-145 Nm
TIMING BELT
COVER C
INSTRUCTIONS FOR INSPECTING AND REPLACING
THE TIMING BELT
WES1ERBEKE requires as normal maintenance, replacing
the timing belt after 1000 engine operating hours. The timing
belt should always be replaced during an engine overhaul.
The adjustments, inspection, and replacement procedures
may be performed without removing the generator from the
boat THE TIMING BELT PART NUMBER IS #043036
Timing Belt Removal
1. Turn the crankshaft clockwise to align the timing mark on
the camshaft sprocket and timing belt rear cover.
NOTE: Always tum the crankshaft clockwise.
TIMING MARK.--=~.//;.J
2. Remove the plug on the left surface of the cylinder block
and insert a rod with a diameter
of 0.31 in (8 mm) to lock
the counterbalance shaft.
NOTE: Be sure to use an inserting rod with a diameter of
0.31 in (8 mm).
I
-----~L6 In [65 mm]
---"'"""""~
ROD 0.31 In [8 mm]
3. Loosen the timing belt tensioner nut.
4. Move the timing belt tensioner toward the water pump,
and temporarily tighten the nut to hold the tensioner
in
that position.
Engines & Generators
CRANKSHAFT
SPROCKET
11