4.5. Tuning the Engine
The purpose of an engine tune-up is to restore power and performance that’s been lost through
wear, corrosion or deterioration of one or more parts or components. In the normal operation of
an engine, these changes can take place gradually at a number of points, so that it’s seldom
advisable to attempt an improvement in performance by correction of one or two items only. Time
will be saved and more lasting results will be obtained by following a definite and thorough pro-
cedure of analysis and correction of all items affecting power and performance.
Economical, trouble-free operation can better be ensured if a complete tune-up is performed
once every years, preferably in the spring. Components that affect power and performance to be
checked are:
•
Components affecting fuel injection ;
Nozzle, delivery valve, fuel filter, water separator, etc.
•
Components affecting Intake & exhaust ;
Air filter, inter-cooler, turbo, silencer, etc.
•
Components affecting lubrication & cooling ;
Air & oil filter, anti- freeze, etc.
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