Draining The Closed Cooling System; Liter Engines (F-Series); 4.3 Gl Draining Only; 5.0, And 5.7 Liter Engines (F-Series) - Volvo Penta 3.0GLP-C Owner's Manual

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VPA 7743722 English 10-2004

Draining the Closed Cooling System

8.1 Liter Engines (F-Series)

1. With the engine turned off locate and loosen the
lower end cap from the heat exchanger (1). After
water has completely drained, retighten the lower
end cap of the heat exchanger.
2. Note the hose orientation on the raw water pump
(G). Loosen the hose clamps (2) and remove the
hoses (E, H, & L) from the raw water pump and
heat exchanger. Crank the engine briefly, (1 or 2
crankshaft revolutions) but do not start the
engine, to clear the water from the pump. Rein-
stall the hoses and secure the clamps in the
same orientation as removed.
3. Remove drain plugs from exhaust manifolds.
Change the level of the boat to ensure complete
drainage. After water is completely drained, rein-
stall drain plugs and torque to 29 N•m (22 lb. ft.).
CAUTION! Be sure the engine side of the sys-
tem has adequate antifreeze to protect it from
the anticipated temperatures to be encoun-
tered. Failure to maintain adequate antifreeze
may result in engine damage during freezing
temperatures.

4.3 GL Draining Only

When draining the 4.3 GL carbureted engine, be sure
to remove the intake manifold drain plug, located be-
hind the alternator tensioning bracket, to drain any re-
maining water in the intake manifold. Otherwise,
follow the directions below.

4.3, 5.0, and 5.7 Liter Engines (F-Series)

Check the coolant level and antifreeze concentration
(check antifreeze manufacturer's instructions). Make
sure the antifreeze's freeze point is adequate for ex-
pected temperatures.
To drain the raw water system of your Volvo Penta en-
gine (with factory installed closed cooling):
1. With the engine turned off locate and loosen the
lower end cap from the heat exchanger (1). After
water has completely drained, retighten the lower
end cap of the heat exchanger.
Maintenance
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