timing mark

[corvair]

Is there a timing mark on the flywheel? I could not find one on the crank pully. or is it only checked by the scan tool?

Trying to find TDC.

[win_daddy]

Originally Posted by corvair

Is there a timing mark on the flywheel? I could not find one on the crank pully. or is it only checked by the scan tool?

Trying to find TDC.

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Take an old spark plug that fits the engine (or buy just one), break off the ground electrode and attach a 1-1/2" extension to the center electrode (tack welding a piece of welding rod to the center electrode should work). Screw this plug in cylinder #1. Now rotate the engine by hand till it stops (piston hits the extension on the plug). Pick a reference spot on the timing cover and mark the balancer (soap stone works good). Then rotate the other way until it hits again and mark the second spot. Exactly 1/2 way between the two marks will be TDC on #1 cylinder.