Not Ranked
Put a thin screwdriver into the spark plug hole and s-l-o-w-l-y turn the engine over with a breaker bar until you feel the piston come to it's highest point....this isn't the scientific way but is fast and easy. After the piston comes to its highest point you will notice that you can turn the engine a few degrees each way and the piston won't go up or down even though you are turning the engine...this is called dwell -- try to guess the spot halfway between the piston going up or down THAT will be damned close to TDC.
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