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vertically near the front of the engine either next to the serpentine belt (5.7L) or in front
of the serpentine belt (6.0L).
Using an 11/16" socket wrench, remove the zinc anode from the lower end of the heat
exchanger.
Inspect the anode for wear, if the anode exhibits signs of excess wear or has reduced to
half of its original size it will need to be replaced.
The engine compartment
interior as well as the engine and transmission exteriors. There is reward in the cleaning
beyond enhancing the overall value of the boat. Cleaning with simple soap and water can
reveal if any corrosion has occurred during the previous season's operation, and establishes
a baseline for the next season.
Corrosion can occur in any type of water and on any metal surface, even when the
type of metal such as stainless steel, has been chosen for components. But corrosion is
of particular concern for boats that will be operated in salt water, even if the system is
closed cooling. Salt water may still enter the engine compartment due to the engine com-
partment cover being open to vent carbon monoxide and prevent explosive fumes. The
exhaust system will always be subject to contact with salt water in these conditions, too.
Galvanic corrosion, or electrolysis, is the decomposition of metal due to the effects
of electrolytic action. When two (2) dissimilar metals are immersed in a conductive fluid
such as salt water, an electric current is produced, much like the action of a battery. As the
current flows, it takes with it tiny bits of the softer metal. If left unchecked, severe damage
may occur over time.
A boat properly prepared for operation in salt water will have self-sacrificing zinc
anodes mounted on the transom, and possibly elsewhere underwater. These anodes are
intended to reduce the effects of galvanic corrosion to critical metal areas of the boat. T he
zinc anodes should be checked regularly, and when significant erosion is shown, the anodes
should be replaced. More information regarding the zinc anodes is contained in the boat
manufacturer's Owner's Manual.
Exposure to salt water causes corrosion, leading to significant damage to metal, in-
cluding stainless steel and chrome. If evidence of corrosion shows on the boat, the
engine and transmission should be carefully cleaned with fresh water and a mild
soap solution after use in salt water. A protective marine oil may be applied to expo-
sure metal to halt the acceleration of corrosion. Failure to pay attention to corrosion
matters will void the warranty.
A complete engine tune-up
or annually, whichever comes first. This includes but is not limited to: replacement of the
spark plugs and spark plug wires (if needed), a check of the installed distributor position
and shaft alignment, as well as cleaning the breather hose. ILMOR strongly recommends
having the engine tune-up performed by an authorized ILMOR dealer.
should receive a good, general cleaning of the
needs to be done at least every 300 hours
2011 ILMOR MV8 Owner's Manual • Page 36
Replacing the
Zinc Anodes
(Saltwater
Applications)
Cleaning Engine
Compartment and
Corrosion Prevention
Engine Tune-Up
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