SOHC.co.uk Forums > CB350/400

Oil leak oil plug left side engine

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Erwin83:

--- Quote from: Bryanj on October 18, 2020, 12:41:12 PM ---This suggests to me that the "pip" on the plug has been shortened somehow

--- End quote ---

Should it indeed be flush?

Bryanj:
The "pip" should be flush with the gasket surface, if you look inside the generator cover there is a part of the casting that holds it in, if this pip has been damaged or shortened for some reason the plug will not be far enough in.
I have never seen this happen in 40 yrs but offer it as a possible explanation

Trigger:
Are you sure that you have a 333 bung as, the 323 bung is shorter  ;) The 323 bung has a depth of 16.50 mm but the 333 is longer .

Also if the bung has been pulled out with pliers, this damages the pip.

Bryanj:
Never looked closely at the 400 one only the 500/550 so Trigger is probably correct

Erwin83:

--- Quote from: Trigger on October 18, 2020, 02:04:21 PM ---Are you sure that you have a 333 bung as, the 323 bung is shorter  ;) The 323 bung has a depth of 16.50 mm but the 333 is longer .

Also if the bung has been pulled out with pliers, this damages the pip.

--- End quote ---

I don’t really know. The pip doesn’t look damaged at all. Could I have a 350cc and 400cc bung mixed up? Is that the difference between the 323 and 333?

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