Honda-SOHC

SOHC.co.uk Forums => CB350/400 => Topic started by: 400 Cafe Racer on July 13, 2021, 10:33:03 PM

Title: Split Crankcase Oil Seal Fitting - Clamp or Press In - Which is Hondas' way ?
Post by: 400 Cafe Racer on July 13, 2021, 10:33:03 PM

Hope to get on further with the engine rebuild shortly, but on stripping I noticed some seals seem to have been "clamped in when fitting" evident by the significant oozing of the plastic profile of the seal protruding inside the case. This would make it almost impossible to extract a seal  without splitting the casings.

OR

Should they all be pressed in externally after mating the casings.

Interested on your thoughts. :-\

Dennis

Title: Re: Split Crankcase Oil Seal Fitting - Clamp or Press In - Which is Hondas' way ?
Post by: Nurse Julie on July 13, 2021, 10:40:29 PM

No, you fit them as you are building the bottom end up. Also advisable to put a very light smear of Hondabond on the housings where they fit.

Title: Re: Split Crankcase Oil Seal Fitting - Clamp or Press In - Which is Hondas' way ?
Post by: 400 Cafe Racer on July 14, 2021, 07:28:44 PM

Thanks Nurse Julie,

Thanks for  confirming what I thought. I have not come accross it specifically mentioned by Honda manual but felt that it should be the case in normal engineering practise.

I did see some "pinching" of the circumference on one seal where the 2 halves of the casing join, which led me to think that it had been fitted "clamped".

I am in the process of doing the internal measurement and inspection of components at the moment and will be in touch with you later. Thanks.

Regards

Dennis