SOHC.co.uk Forums > CB350/400
Crankcase oil leak - easy repair?
Drew400:
Hi all,
Just when I thought it was nearly time to start this thing for the first time in 18 month, I seem to have dislodged an oil seal!
Those of you who have followed my 'starter motor not working' thread (http://www.sohc.co.uk/index.php/topic,8030.0.html) will know that I spun it up, only to see a large pool of oil appear! It was coming from the rotor end, so I whipped off the cover to reveal the lower 'seal' had been pushed out by the oil pressure from running the starter enough to see the oil pressure light go off... a good sign, generally!
You can see from the pictures below the 'plug' sits at the bottom of the crankcase, underneath the rotor (left corner).
My question for you experts is how best to re-fit this and stop the leak. It has a new(ish) o-ring in place. Do I just push it back in (hard) or apply some sealing gunge first?
It seems to me that this is probably a one-hit wonder, as there is no obvious way of pulling it out again, other than pushing it using oil pressure within... a somewhat messy process!
Thanks again experts,
D.
mike the bike:
Clean it up, plaster it with sealing shite and lightly hammer 🔨 it in place. Happened to my mates 400.
Drew400:
That would be solution too, but sometimes I learn on this forum that I should be doing such things differently.
Thanks for the affirmation Mike.
Cheers,
D.
Bitsa (Ralph Wright - RIP):
Never had to do that afore.The gasket and the alt cover correctly in place should be suffice but would gently tap fully in
Cheers
Bitsa
Drew400:
Hi Bitsa,
The chap who refurbished my crankshaft bearings popped this plug out to make sure that there were no beads left in there from the blasting process. He was right to do so as there were plenty there, despite various cleanings (e.g air line). etc.
Clearly, I need to make sure it's bashed properly back into place before I fire this baby up.
The oil seeps mainly from the rubber grommet that surrounds the exiting generator cables... something else for me to renew. Oh joy.
The real joy (at this stage) is not reading you chaps telling me to remove the engine, split the crankcase and do the whole bloody rebuild thing all over again!
Cheers,
D.
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