Question about GMC Jimmy
U have to find #1 cylinder compression stroke, piston at top of cylinder both valves closed. Piston position can be found by removing #1 spark plug and inserting a long screwdriver into hole and rotate engine slowly by hand until screwdriver is pushed out the most. There are two strokes that piston is extended these are exhaust stroke with exhaust valve open and compression stroke both valves closed. Valve position in relation to piston position can be found by removing valve cover on #1 cylinder side. once position is attained point rotor towards #1 cylinder. The best way to find #1 cylinder is to call autozone or comparable and they can tell u based on your engine. hope this helps please rate me
Posted on Jan 12, 2009
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Posted on Jan 02, 2017
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