Rear main bearing - fitting

[Tony Press]

I never drift the inner race onto the crank, its a surefire way to eventually have a loose journal. I warm the race with a hot air gun until it is just too warn to touch, it will then simply drop onto the crank without any drifting and immediately cool securely in place. I then fit the outer by warming the case and it will also go in without force.

Excellent instruction.

As noted if the outer ring is put in place in the case first there is every chance of the hardened roller set sliding heavily across the hardened running track causing one or more scores and leading rapidly to early onset of the well known 'rumble'