Liter Engines (F-Series); Impeller: Checking & Replacing - Volvo 5.0OSiE-J Operator's Manual

VPA 7748131 English 09-2007
23679
23675

8.1 Liter Engines (F-Series)

NOTICE! Check the coolant level and antifreeze con-
centration (check coolant manufacturer's in-
structions). Make sure the coolant's freeze
point is adequate for expected tempera-
tures. Failure to maintain adequate anti-
freeze may result in engine damage during
freezing temperatures.
1. With the engine turned off locate and loosen the
lower drain cap from the heat exchanger (1).
After water has completely drained, retighten the
lower drain cap of the heat exchanger to
18-30 ft. lb. (25-41 Nm).
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. Probe the drains with a wire to ensure
rust particles have not blocked the drain. After
water is completely drained, reinstall drain plugs
and tighten securely.
Impeller: Checking & Replacing
NOTICE! If the engine is installed so that the seawa-
ter pump is located under the water line,
there is a risk of water penetration. If you
have a seacock installed, close it now.
NOTICE! Always carry a spare impeller on board.
1. Remove the hose clamps and hoses from pump.
2. Loosen the four screws (1) and remove the hous-
ing (2).
3. Inspect the impeller (3). If there are cracks, signs
of burning or melting on the edges, or any other
visible defects, the impeller must be replaced.
Inspect the O-ring (4) for nicks, cuts, and wear.
Replace as necessary.
4. Lubricate the pump housing with non-petroleum
based lubricant, suitable for rubber, such as glyc-
erine. If you have purchased the Volvo Penta
impeller kit, a packet of glycerine is included.
5. Reinstall the impeller. Reinstall the housing.
6. Install the hoses and hose clamps.
Maintenance
83