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Labor Day Putting down your wrenches or time for
MORE wrenching? 
Plenty of places to share. | | Click on image for the lowdown. 
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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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#76178 04/12/2007 4:53 PM | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | sablesurfer,
Good questions. The crank pulley rotates clockwise as viewed from the front. As the mark on the pulley approaches the first in the series of lines on the tab...this is the MOST advanced. Usually the LAST line on the tab equals 0° BTDC. 0° before top dead center is TDC!
To speculate, the last line in the direction of rotation is TDC and each line before that usually represents 5°...I think.
Does this make sense!
Stuart | | |
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