SOHC.co.uk Forums > CB350/400

Oil leak oil plug left side engine

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Erwin83:
Hi everyone.

I'm having difficulties beating an oil leak on my CB350f.
I've already replaced the O-ring (#13) with a OEM Honda one (6 euro for an O-ring  ;D).
Cleaned the hell out the area where the plug (#3) goes, took the plug out and cleaned again. Added a tiny smear of gasket to the plug on the outside of the O-ring... Still leaking. And not a weep, but quite big drops. Too much to ride around with.

The area above the plug is dry as bone, so I have no reason to assume it would be the crank oil seal.
There are also no visible oil traces from the oil pump area (on the side stand, it would drip to the lowest point on the casing, which is where I am leaking oil)

Am I missing something? Do you have any suggestions?

mike the bike:
It needs to be tapped in to place.  Obviously not too hard, but firmly.

Bryanj:
You did fit it with the pin facing outwards?  and the generator cover needs to be fitted to hold it in.

Erwin83:

--- Quote from: mike the bike on October 01, 2020, 08:16:37 AM ---It needs to be tapped in to place.  Obviously not too hard, but firmly.

--- End quote ---

Hmm, ok. I just pressed it in with my thumb. It is snug though. The O-ring definately seems to be compressed.
I'll try to give it a tap, see if it goes any deeper.



--- Quote from: Bryanj on October 01, 2020, 08:19:35 AM ---You did fit it with the pin facing outwards?  and the generator cover needs to be fitted to hold it in.

--- End quote ---

Yes, pin facing outwards. Cover mounted. I've not yet gone to the lenghts of making a plate to keep the plug in and be able to run the engine without the cover.

Erwin83:
OK, I was actually able to gently tap the plug in about a millimetre further.
I'll give her another warm up later today and see if there's still a leak. Fingers crossed  ::)

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