I installed a new OEM honda rear seal into my b18c last night and now I'm thinking i may have pressed it in to far. I was thinking it would be a good idea to tap it in more than the original seal so the new seal would have a untouched portion of the crank shaft to ride on. I seated it evenly with no damage to the new seal at all. I just want to make sure that this is okay before i put everything back together this afternoon.

 

A couple mm shouldn't hurt anything as long as its even all the way around. In the Porsche world, there was an updated rear main seal that came out several years ago, that purposely was installed about 2mm deeper that the original seal.
You should be good to go!

 

Also utilizing a 2-3 mm variance is the trick to seal up any crank with a groove.

It's exactly what the factory trained Honda techs do when they find a groove. They install the seal a little deeper.

 

Thanks for the reassures guys. I'd hate to bolt this transmission back up just to find a leak.