Sizzle Chest

This might be a dumb question but I can't find any answers searching. When adjusting the valves on the 20r, do I use 8 degrees or 0 degrees for top dead center? You're supposed to use 8 degrees for timing, but maybe that's just for timing? Any info appreciated!

Co_94_PU

iTrader: (-1)

Consult the manual, or your cam specs? Zero generally, the rockers should be centered in the round section, IE fully closed valves.

millball

TDC for valve timing. 8 degrees is for spark timing.

Sizzle Chest

Thanks. The more I thought about it I realized that had to be the correct answer since spark timing is before top dead center, and you wouldn't adjust valves before TDC. Anyway, thanks again guys!