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yorkshire_spam

Newbie oil ring question...

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Is it possibsle to ask the ring, or piston makers, or else your supplier, Sam?

J.

Edited by JohnD

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Never seen them before but a bit of googling suggests that the highlighted part is the expander spring for the centre section and is fitted first. There is also comment passed that they are tricky things as the expander spring can sometimes get behind the thin outer rings and prevent them going fully flush in the groove making the piston impossible to fit in the bore. Further comment says they have high pressure on the bore walls making them quite effective for oil control Even on imperfect bores but giving high wear rates And sapping power at higher rpm.  Ideal for a part worm Triumph 1500 then?:huh:

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No reason why you can't fit a different set if you want to.  Should only be £ 35 or so for a set.  Just need to get them sized for the piston size you are using, or possibly, as this is a hone of worn bores, the next size up and file the ends as necessary to get the gaps.

Nick

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4 minutes ago, yorkshire_spam said:

Block has just had a pretty serious rebore

Ah, ok, sorry - mixing you up with Pete I think...... must pay more attention :unsure:  Match the piston oversize then.  Gaps will need checking though

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Hi Sam - after your rebore, do have a think about blanking off those two blind jigging voids that are close to the fire rings on No.1 and No.4 bores.

See - 

I'm not saying that you will definitely have this trouble, but it might be worth considering while you have it apart.

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