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How to Maintain your
Natural Gas Engine 2
A top end overhaul should be performed at
approximately 11,000 hours for low speed, as well as high speed engines.
Follow the manufacturer's recommendations for this procedure. Basically,
in order to perform a top end overhaul, start by removing the cylinder
heads and perform a valve job and top end inspection. Due to the normal
wear on the valve and surfaces of the seat, the valves may not seal
correctly as they are cycled during the combustion process. In order for
the valve seat to seal properly when the valve is closed, a valve job to
refinish the surface of the valve and valve seat must be performed.
At about 24,000 hours of operation for high speed engines and
approximately 34,000 hours for low speed engines, a major overhaul
should be conducted. A major overhaul involves rebuilding the valves,
cylinder rings, crankshaft and camshaft bearings, and oil seals.
Other maintenance procedures involve an engine oil analysis. This would
entail the evaluation of both the chemical and physical properties of
oil and the oil itself. Also inspect for water or coolant in the oil. It
is important to check the oil properties because it is a good indicator
of how your engine is functioning. It also alerts you to potential
problems with your engine before they become major problems. Check with
your manufacturer regarding this service.
It is easier to change maintenance hours into a mileage equivalent.
Multiply the hours by 50 or 60 to obtain a mileage equivalent. In this
way, if the manufacturer suggests changing the water pump at 6000 hours
of operation, you could figure that if you drove you car for 6000 hours
at 50 mph, (6000 x 50) you would accumulate about 300,000 miles on your
odometer. This is an easier method of determining which procedures need
to be done within a certain period of time.
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