service manual 55a four marine diesel engine - Westerbeke

ENGINE REASSEMBLY
10. Install each connecting rod bearing cap as follows:
a. Measure and adjust the connecting rod bearing and
crankshaft pin journal oil clearance by the same procedure
used to measure and adjust the crankshaft and
main bearing oil clearance.
CONNECTING
ROD CAP
~--'-J.._ PLASTiGAUGE
L---- CONNECTING
ROO
c. Install the connecting rod bearing cap, and tighten to
the specified torque. Before installing, apply a coating
of engine oil to the bolt threads, nuts and bearing
surfaces.
Connecting rod bearing cap tightening torque:
7.0 - 7.5 kg-m (51- 54 ft-Ib)
Standard oil clearance:
0.03 - 0.06 mm (0.0012 - 0.0024 in)
Oil clearance limit: 0.08 mm (0.0031 in)
Undersize connecting rod bearings:
0.25 mm (0.010 in), 0.50 mm (0.020 in),
0.75 mm (0.030 in)
" A CAUTION: When installing the connecting
rod cap, fim align the cap and connecting rod
matching marks.
Before installation, be absolutely SUfe to apply a
coating of engine oil to the bearing.
"MATCHING
MARKS
MEASURING CONNECTING ROD BEARING AND
CRANKSHAn PIN JOURNAL OIL CLEARANCE
b •. Check the end play of the connecting rod.
S~~dard connecting rod end play:
0.11 - 0.26 mm (0.0043 - 0.0102 in)
End play limit: 0.35 mm (0.014 in)
A CAUTION: Measure the connecting rod end
play before installing the connecting rod cap.
Rear Cover Assembly
INSTAWNG CONNECTING
ROD BEARING CAP
1. Apply engine oil to the rear cover and the oil seal.
A CAUTION: Remember that when engine oil is
applied to the cover and seal, it must also be
applied to the oil seal lip.
Engines & Generators
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