Draining and Filling Engine Coolant (closed
cooled models).
Remove the bottom cover p[ate of the heat ex-
changer to dram sea water from heat exchanger
core. Loosen hose clamps and remove hoses from
rear of sea water pump. Be sure to allow hoses to
dram completely Drain exhaust manifolds by re-
moving the cooltng hose on the forward end of the
manifold or by removing the hose clamp and cap on
the rear of manifold
NOTE! Marine inboard engines can be installed at
various installation angles Be sure to dram exhaust
manifolds from the lowest point (front or rear)
Remove the hose from the heat exchanger to the
expansion tank Th~s wd[ drain the coolant mtxture
from the expansion tank and heat exchanger Dis-
connect and dram the large hose from the ctrcula-
tion pump The engine block is drained by opening
the petcocks on both sides of the engine block
Note[ If engine block does not drain, probe petcock
with a piece of wire to remeve any sediment.
Before filling the system, close a[I petcocks and
check the tightness of all hose clamps. Prepare a
50/50 mixture of fresh water and antt-freeze Refer
to "Technical Data" for cooling water capacity Fill
the cooling system until the coolant level is equal to
the "Minimum" mark on the expanston tank Start
the engine to pure the coohng system of trapped air
Note! Do not run engine without water supply to sea
water pumpl
Check cooling system for leaks. When engine
reaches operating temperature shut off the engine
and check the coolant level Coolant level shou[d be
between the "Maximum" and "Minimum" marks. Add
coolant as required
Z~,
WARNING! Closed fresh water system is un-
der pressure Turn fill cap to first stop to re*
Ileve pressure Then fully remove cap for
servicing
12
7788827 - Ladattu osoitteesta www.volvopenta.com 17.11.2010 12:21:31
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