SOHC.co.uk Forums > CB350/400
CB350F crankshaft oil seal leak
royhall:
Yep, I can barely believe I did it myself.
Consensus appears to be the engine has to out, so that's the way I shall go.
That said, whats the easiest way of doing this. Can I take the engine out whole and get it upside down on the bench and just take off the bottom casing. Or has the whole thing got to come apart again.
Thanks for all the opinions, your right its best to do it the correct way.
Will take out all the after market seals whilst I'm in there and fit Honda Genuine. Have heard some bad reports about the after market seals, obviously after I had fitted them, so may as well kill that problem as well whilst I'm in there.
Thanks all.
Chris400F:
--- Quote from: royhall on November 05, 2015, 12:35:44 PM ---Can I take the engine out whole and get it upside down on the bench and just take off the bottom casing.
--- End quote ---
Given that the engine was originally assembled upside down with the parts in the top casing I don't see why this shouldn't work.
Can't see any obvious need to dismantle everything again, just loosen the cam chain tensioner to allow for movement of the crank.
Bryanj:
Yup, once all the gubbins is off the sides just lift the bottom case off just be carefull getting the selectors in situ on rebuild
Tiny Tim:
Sorry to read your seal problem Roy. At least it gives me a chance to catch up.
Good luck with the fix.
exvalvesetdabbler:
On the 400F it is possible to split the engine upside down with the top end in place. I replaced the camchain and primary chain that way some years ago. You might need to drop the cam sprocket off the camshaft though if you want the crankshaft out. However, if you only need the clearance to slip on a replacement seal than I would try pushing the cam chain tensioner plunger all the way back and locking it.
I made a similar slip up and got one of the blanking plugs/seal on the end of the gear shaft in wrong which blew out and dumped oil everywhere. There's a piece on the seal that locates in a recess on the crank case. It's all too easy for it to spin round when you're playing with the gearshafts.
Best Regards
Dave
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