Quote:
Originally Posted by 04 Diesel
TDC is when valve cover off and marks line up with both lifters up on #1 cylinder?
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There are 2 TDC moments.
1) when both cam lobes (lifters up) are pointing up. We refer to this as the compression stroke -when fuel delivery occurs
2) 180* on the camshaft from moment #1) which is the exhaust stroke.