DON'T TRY THIS AT HOME ALERT - saner minds say there is more force at work than I imply! Please read the rest of this thread.

Much less than that if the compression test shows only 60psi

Seriously, whatever the force is imparted by 50psi, most of it is compressing the connecting rod which will stand up to it all day (this isn't a 603.97, after all). Very little of it is pushing the piston sideways to get the crank to turn. With the injectors out it takes very little effort to turn the engine, but likewise it takes very little effort to keep the crank from turning. You can hold a belt in your hand to keep the crank from turning. Either that or I've only done leakdown tests on very sick engines :/

Sixto
93 300SD