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Old 02-24-2024, 06:50 PM   #17
JayJay
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Join Date: Jan 2020
Location: SF Bay Area
Posts: 2,109
Default Re: Rotor position at TDC

Quote:
Originally Posted by fried okra View Post
Thanks JayJay....will need to check if can see the valves at TDC....just been looking at the piston.

Should the distributor rotor be at #1 plug contact in distributor on both exhaust and compression stroke when piston at TDC?

Yep, been been rotating engine clockwise when viewed from the front....thx.
Distributor is driven by the camshaft. One revolution of the camshaft (and one revolution of the distributor) equals two revolutions of the crankshaft. So no, TDC of #1 cylinder on compression the distributor rotor points to #1, and at TDC of #1 cylinder on exhaust (which is TDC on compression of #4 cylinder) the rotor points to #4.
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JayJay
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1930 Murray Town Sedan
1931 Briggs S/W Town Sedan

It isn't a defect, it's a feature!
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