BBC timing marks - Team Camaro Tech
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post #1 of 3 (permalink) Old Mar 19th, 11, 03:18 PM Thread Starter
DT
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BBC timing marks

Just want to confirm the timing marks on a BBC. I'm in the middle of changing a timing chain and the timing marks are at the 12 o"clock on both the crank gear and the cam gear. This is at 0* and the #1 TDC. Thanks.

1969 X66 396 LeMans Blue, M20, 373 (Sold)
1969 Convertible LS3 TKO 600, 373
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post #2 of 3 (permalink) Old Mar 19th, 11, 04:50 PM
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Correct.
If you were to stab the distributor at this point, the rotor would need to point to #1 cylinder terminal and the cylinder would be at TDC - ready to fire ...

When the marks are set 'dot-to-dot' (or the cam at 6 o-clock/crank at 12 o-clock) then the #1 is at TDC on the exhaust stroke transitioning to intake.

Sounds counter-intuitive ...

I always align 12 o-clock to 12 o-clock before stabing a distributor.

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post #3 of 3 (permalink) Old Mar 19th, 11, 05:03 PM Thread Starter
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Re: BBC timing marks

Thanks John

1969 X66 396 LeMans Blue, M20, 373 (Sold)
1969 Convertible LS3 TKO 600, 373
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