Join Date: Mar 2002
Location: Austin, TX, USA
Re: finding TDC
I used a poor man's piston stop which is nothing more than a piece of 1/4" soft copper tubing. First, pull all the plugs so the engine will turn over easier. Get it close to TDC by turning the motor over until it begins to blow air out of the #1 spark plug hole. Then stick the copper tubing in. As you turn the motor toward TDC, the copper will mash down and eventually stop the engine from turning. Put a mark on the damper (Jim's tape trick works nicely). Then turn the motor backward until the stop prevents it from turning further. Put another mark on the damper. 1/2 way between the two is TDC.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI