Hi all, When removing the crank pulley bolt (using an impact driver), is it necessary to lock the flywheel? It seems to me like you would have to (especially when tightening back up with a torque wrench), but some of the other posts on this subject don’t mention it, and I am a little apprehensive about how to lock the flywheel without risk of damage to the starter ring teeth - I can’t see how a more traditional locking tool could fit with the engine in the car (and still attached to the gearbox). The car is a 1979 308 GTB. Many thanks.
Agreed - though never on a Ferrari, I've removed a LOT of crank bolts... never locked the flywheel down.
Using an impact gun = typically not necessary to lock the crankshaft rotation somehow as the inertia/friction of the rotating assembly is enough to prevent things from moving before the crank bolt threads release. Using a manual braker bar = in a high gear and e-brake "on" is usually enough, but adding screwdrivers in the rear brake disk edge vents, as absostone suggested, is the next level.
