Leak Down Test: Finding TDC

[Garhard12345]

So I am buying a guage so I can do a leak down test on my LS. Do you guys know of an easy procedure to find TDC for each cylinder???

[crazycrxtuner]

to make it easy to find tdc. you can buy a tool that goes in place of the spark plug and rises to let you know when youre in the compression stroke and approaching tdc.

[hobie237]

take off the valve cover and turn the motor with a wrench. watch the intake valve open and close and the piston come up. Now you're at TDC.

[tegdude227]

yup thats how i found TDC when i was changing the head gasket on my 92 gsr