LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Finding TDC ?

Old Jul 5, 2004 | 08:30 AM
  #1  
magnumv8's Avatar
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Finding TDC ?

I need to adjust my roller rockers on my new engine. I have an ATI Super Damper on it which is degreed with a TDC mark. My question is... do I put the TDC mark straight up at 12 o'clock for #1 TDC.

thanks
Old Jul 5, 2004 | 09:11 AM
  #2  
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Not sure how your damper is marked so the only sure fire way to find TDC on #1 is watch the rockers when the piston is on it's way up the cylinder and the valves are both closed. Use a stick in the cylinder through the plug hole to see the movement of the piston. When it's at the top of the stroke and both valves are closed, that's TDC.

Follow this instruction from Rob, thanks Rob.
http://shbox.com/1/4th_gen_tech2.html#adjust_valves.
Scroll down about 1/3 from the top.
Old Jul 5, 2004 | 01:28 PM
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magnumv8's Avatar
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thanks, I got them adjusted. Turns out 12 o'clock was TDC.
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