Whilst I encourage you to investigate and check the run out of the bits on the end of the crank I'm not too keen on the idea of re-checking the torque of the 27mm bolt.

I think that so long as the parts on end of the crank are running true I wouldn't mess with that 27mm bolt. To do the job properly you need to have a flywheel clamp => I only managed to torque up my 27mm bolt because the engine just so happened to be out of the car with out the transmission fitted.

Has anyone ever made a good DIY tool to lock an OM617 flywheel?

In your situation it will be difficult to make sure that the flywheel doesn't spin if you are not using a gucci flywheel lock.

To check for the "running true" of the bits on the end of the crank you could do it this way



or this



Obviously these are pictures showing measurements of parts not found on an OM617 but I hope you get the general idea

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!