A straw. Remove #1 plug.With the distributor cap off, the rotor will tell you if it is near #1.Bring the crank slowly up to # 1 marked on the pulley, stick the straw into the plug hole, and SLOWLY bring the crank around watching the straw. It will push up out of the hole and when you pass the TDC, it will start going down.This is about as accurate as you can get as you are watching the piston travel.RayOn Sat, Mar 13, 2021 at 1:53 PM Ron Kurtz <mark6268@xxxxxxxxxxxxx> wrote:Hello, everyone:
Which is the most accurate top dead center tool for an engine already installed? Been a while since I last used one.
Best,
Ron Kurtz
E #292
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