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pooch · 12-11-2017, 04:40 PM

You should be able to get your no 1 piston somewhat TDC on no 1 without removing the head.

Certainly close enough to a single tooth tolerance on the timing gear .

Put a chalk mark on the crank pulley to a mark on the block.

Rotate the engine and look down no 1 spark plug hole until you see both valves rocking , this is where the piston should be on TDC on the backstroke.

When they are rocking , your chalk mark should line up with where you marked it.

12-11-2017, 04:40 PM	#5
pooch Senior Member Join Date: Sep 2010 Location: South Coast NSW Australia Posts: 2,596	Re: Rebuilt Flathead Problems. You should be able to get your no 1 piston somewhat TDC on no 1 without removing the head. Certainly close enough to a single tooth tolerance on the timing gear . Put a chalk mark on the crank pulley to a mark on the block. Rotate the engine and look down no 1 spark plug hole until you see both valves rocking , this is where the piston should be on TDC on the backstroke. When they are rocking , your chalk mark should line up with where you marked it.