Timing Issues How to tell if your on Compression or exhaust stroke

[yarddog1950]

On the exhaust stroke, the exhaust valve is open so you will not feel pressure with your finger.

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[JoshMc]

Yarddog said it right but after you determine that you are on a compression stroke you can stick a screwdriver down the spark plug hole and SLOWLY turn the crankshaft while watching the screwdriver. Once the screwdriver begins to drop you know that it was at the top of the stroke so all you have to do is turn the crankshaft the opposite direction to get it back to the apex. Be sure that you don’t let the screwdriver bind on anything and turn the motor over very slowly by hand. If you do this too fast it can make a huge mess of the motor and a lot more work to fix. Extreme caution and patience required. Lol

[EricTheCarGuy]

I actually cover that in this video._x000D_
http://www.youtube.com/watch?v=WgrfT0LF … ure=relmfu

[Author]

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