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Discussion Starter · #1 ·
To find TDC on my new ford crate engine, we took out the #1 spark plug, I placed my finger over the hole while my helper turned the crank. When air came out, we knew we had the compression stroke. Then I put a screwdriver in while he continued to turn the crank. When the screwdriver stopped and started going down, we knew we had TDC.

Then today I saw this on MotorWeek:

It's not something you would use everyday or even twice, but it is one of those tools that no one else has.

Tom M.
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