Westerbeke 6.5 MCG - COOLANT CIRCULATING PUMP; REINSTALLING THE COOLANT PUMP

COOLANT CIRCULATING PUMP
REMOVING THE COOLANT PUMP
1. Loosen the belt guards thumbscrews and remove the
engine's belt guard from its brackets at the front of the
engine.
2. Ease the belt tension by releasing the raw water pump and
remove the engine drive belt [on carburetor models it will
be necessary to remove the governor belt].
3. Unscrew the five bolts that hold the pump to the engine
and remove the coolant pump and its gasket. Note that the
pulley is an integral part of the pump assembly.
INSilECTION
RAW WATER
PUMP PULLEY
Carefully check the pump body and impeller for cracks and
damage. Inspect the weep holes for si~ of water leakage
and rust that would indicate a faulty seal. The pulley should
turn the shaft (and impeller) smoothly, without noise or
sluggish rotation.
The pulley edges should be smooth and undamaged and the
locknut should be drawn up tight
COOLANT PUMP
PULLEY
REPAIR
If the pump does not pass inspection, replace the entire pump
assembly which includes the pulley.
THREE BOLTS
0.24 X 1.381N
(96X35 mm)
INSTALLATION
PUMP BODY
lWO BOLTg
0.24 X 0.71 IN
(6 X 18 mm)
When reinstalling the pump use a new gasket. There are five
bolts in two sizes that fasten the pump in place, make certain
they are positioned properly. See the diagram above. Use
sealant when assembling the new gasket.
CIRCULATING PUMP BOLTTORQUE 6 ·7ft ·lbs (8 ·10 Nm)
Engines & Generators
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