it's when the piston is all the way up
The piston will usually be a few degrees before top center.
The top dead center is when the piston has reached its peak and can go no farther up, it has reached its summit. The bottom dead center is when the piston is at its lowest point.
NUMBER6 PISTON ALSO IN top dead centre
Top dead center on an engine is defined as when the piston is farthest from the crankshaft. Bottom dead center is when the piston is closest to the crankshaft on the engine.
No need to when disassembling.
#1 piston must be at TDC / Top Dead Center on the compression stroke.
The distance from Top Dead Center to Bottom Dead Center of piston movement.
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Top dead center. It is when a piston is at its highest position.
the piston in cylinder #1 at the top on the compression stroke
Measure the distance a piston travels from bottom dead center to top dead center.
The distance from Top Dead Center to Bottom Dead Center of piston movement.