Diyvehiclerepair
Is TDC on compression stroke?
As a general reference point, or when installing a distributor; Top Dead Center (TDC) on the compression stroke is required. ... So, being able to accurately find Top Dead Center (TDC) is a critical step; no matter what engine you are working with.
What is top dead center?
Top dead center is the position of an engine's piston when it is at the very top of its stroke. The piston has moved up towards the top dead center. The piston is said to be at top dead center when it has moved to a position where the cylinder volume is a minimum.
Should all valves be closed at TDC?
It's up to you. Both valves should be closed if it's TDC at the end of the compression stroke. If it's TDC at the end of the exhaust stroke, you should be in the valve overlap zone, with the intake valve partially open and on its way to opening fully, and the exhaust valve partially open on its way to closing.
