Flywheel O-ring seal

[Sven-Olof.Brorsson]

Flywheel O-ring seal. I am about to install a flywheel on to a crank and I cannot have the O-ring to seat correctly as it is pulled in between the flywheel and the crank. I use a graphite coated o-ring with engine assambly lubeon it, but of no luck (have ruined 2 tonight). Do I have to use them or is there a vizzard thing to do to them so they pushes over the crank easier.

[Bruce Tweddle]

S-O, you must use it.

I assume you are working with aftermarket parts.  I would compare the end of the crank with a stock crank.  Is there a chamfer there? 
Use oil on the O-ring.
Is the depth of the groove on the flywheel correct?  Pack an O-ring into the groove of a stock flywheel and measure the ID.  Then do the same with your problem flywheel and compare.

[Ohio Tom (DdK)]

Many cranks don't have enough chamfer. You can hand work more of a chamfer with some emry paper. Or, better yet, chuck it in a lathe.
Also take a look at your O-rings. The quality of them has gotten really crappy lately. Lots of flash on them to grab and pinch.
I always scout the swap meets for good O.G. O-rings. I even pull them out of old used flywheels if they aren't all hard.
I have a personal secret stash of them.. Shhhhh....

[Sven-Olof.Brorsson]

Thanks for your help guys. Appreciated. I looked thru my stash of o-rings and found a german made quality product that fitted both the flywheel AND the crank! Went on like butter on bread!! So quality has a value. I have to buy a few of these and keep them for the future! Elring is the product name.

[martin]

That's one of the Berg-isms, use the OG ORing.