Full Closed Cooled Engines - Marine Power 4.3 VORTEC MPI Owner's Manual

9.
Winterization
5.7 Full Closed Cooling Diagram

Full Closed Cooled Engines

Test antifreeze-water concentration to assure adequate
protection for your location.
Remove hoses from inlet and outlet of crankshaft
seawater pump.
Remove drain plug from transmission/engine oil cooler.
Remove drain plugs (if equipped) from exhaust risers.
Note the routing of your inlet cooling water hose to
make sure there are no locations which may trap water.
If your engine is attached to a v-drive transmission, pay
particular attention to the draining of the v-drive cooler.
Remove end caps on heat exchanger. Inspect for debris
and trapped water. Remove zinc anode and replace if
necessary.
Spray each of your engine mounts with WD-40 or
equivalent lubricate.
Remove Hoses from
Sea Water Pump
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