SOHC.co.uk Forums > CB350/400

Cylinder block O'rings.

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Piki:
Hi all, anyone know what function have o'ring?
Number 283:
http://www.cmsnl.com/honda-cb400f-general-export-kph_model14637/partslist/E01-1.html#results

Best Regards.

steven400/4:
they sit in the reset on the bore sleeves oil seals i think

Bryanj:
around the cylinder sleeve on the bottom above the base gasket in a groove

Piki:
thanks ......... but what is its function? At the site where they are placed does not seem very important.
I have raised the head engine(I am working about one oil leak) and the cylinder block has risen also(the cylinder block was attached to the cylinder head),I looked below the cylinder block and seen the o´rings are out of place. I can not put it into place(I do not want take off the cylinder block because the engine has only 1200 milles with new o´rings from the last restauration), and I thought of leaving them as they are.............. What can I do?
Thank you very much and sorry for me English.

Bitsa (Ralph Wright - RIP):
Piki.
As with all Honda cylinders I think its meant to stop oil going up between the cylinder liners and the aluminium barrel.There is a certain amount of crankcase pressure.
This is what I believe otherwise why would Honda fit them?
Hope this helped you.
Cheers
Bitsa

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