SOHC.co.uk Forums > CB350/400

Oil leak

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adriangsmith:
No oil leaks from the casing joins at all. It is leaking out of the bolt stem between the 2 ribs.

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Nurse Julie:
Yes, i see which one you mean now. Not sure why you have oil coming up through there, unless you have put a too long casing bolt in and made a hole in the casing or as Oddjob says, maybe something not aligned properly. Is there much oil coming up?

adriangsmith:
Quite a good seep once its revved up

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Nurse Julie:
I know i had real issues with those casing bolts on my engine, trying to fit the correct length bolt to each hole was difficult. I measured all my bolt holes with the vernier in the end to make sure i put the right size in the right place. really, it can only be a slight misalignment or the bolt has gone through the casing. No other way oil could come up the thread, the bolt / thread shouldn't be anywhere near oil.

Nurse Julie:
Here is a pic with the sprocket off, I can see how if an over long stud had been put in, it could easily have caused a crack. The crack may not be visible as it could be internal not external [ Guests cannot view attachments ]

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