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9. Winterization
Remove Blue Plug from
Manifold Fitting
Remove Circulating
Pump Hose
Remove Hoses from
Sea Water Pump
Remove knock sensors from each side of engine block
Remove Blue Plug from
Manifold Fitting
Extended Storage and Storage
in Below Freezing Temperature
4.3/5.7L Raw Water Cooled Engines
1. Shut down engine and change engine oil and filters.
(Refer to Section 10: Engine Maintenance.)
2. Remove drain plug on lower center portion of block
on each side. Knock Sensor must be removed for
draining and torqued to 22 ft-lb. when re-installed.
3. Remove engine oil and transmission cooler drain
plugs.
4. Remove hoses from sea water pump, if applicable.
Remove circulating pump hose from lower inlet
to circulating pump. Remove all exhaust manifold
drain plugs. Drain engine completely.
5. Any engine stored for thirty (30) days or longer
needs a fuel stabilizer. We recommend that Sta-
Bil be added to the fuel per the manufacturer’s
directions. This will prevent the formation of
harmful varnish in the fuel system.
6. Reconnect suction hose to sea water inlet.
7. Re-install hose on circulating pump after system
has drained completely. Coat all plug threads with
sealant and re-install into proper locations.
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