Harmonic Balancer..............

[IJ.]

You need to stop it rotating !

A screwdriver in the ring gear teeth works and if the motor is out of the car I use a short chain from the flywheel to the engine stand leg.

 

[retroman]

Hmm, thanks for the tip. I'm weak, built like a fluffy muffin, I hope I can do it.

 

[IJ.]

A strong helper would be useful