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glennpm · 12-11-2017, 05:17 PM

There is no need to pull the head to find TDC. That's a lot of work for no gain.

Look at the link in my post #6. You slide the head of a large zip tie in the spark plug hole, slowly rotate the engine until it stops and make a mark, rotate in the opposite direction until you hit the stop and make another mark. Half way between the two marks is TDC. This same method is used for OHV motors using a hard adjustable stop that is threaded into the spark plug hole. This of course won't work with our flatheads but the zip tie or similar will.

12-11-2017, 05:17 PM	#11
glennpm Senior Member Join Date: Sep 2014 Location: Wiscasset, Maine Posts: 1,981	Re: Rebuilt Flathead Problems. There is no need to pull the head to find TDC. That's a lot of work for no gain. Look at the link in my post #6. You slide the head of a large zip tie in the spark plug hole, slowly rotate the engine until it stops and make a mark, rotate in the opposite direction until you hit the stop and make another mark. Half way between the two marks is TDC. This same method is used for OHV motors using a hard adjustable stop that is threaded into the spark plug hole. This of course won't work with our flatheads but the zip tie or similar will.