Honda-SOHC

SOHC.co.uk Forums => CB750 => Topic started by: AshimotoK0 on February 17, 2016, 09:43:25 PM

Title: Pic for Trigger showing funny ring that goes under three piece oil ring on K0
Post by: AshimotoK0 on February 17, 2016, 09:43:25 PM: Here goes Graham on K0 funny oil control ring under main oil ring. Hondaman told me to discard the funny ring.

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Title: Re: Pic for Trigger showing funny ring that goes under three piece oil ring on K0
Post by: AshimotoK0 on February 17, 2016, 10:43:41 PM: Quote from: Oddjob on February 17, 2016, 10:03:03 PM
Can't see it myself Ash, all I can see is the old style oil control ring which was cast in one piece before they started to use the 3 separate part oil rings.

No3 looks odd though, can't seem to place where or what that is.

You can see it here Ken

[attachimg=1]
Title: Re: Pic for Trigger showing funny ring that goes under three piece oil ring on K0
Post by: Trigger on February 17, 2016, 10:55:49 PM: See what you mean now ;D
Title: Re: Pic for Trigger showing funny ring that goes under three piece oil ring on K0
Post by: Bryanj on February 18, 2016, 07:22:45 AM: Used a lot on older car style, Its there to help push the oil ring out to the cylinder wall which the centre bit on the 3 piece does as well but the thin side bits scrape the oil better than the big thick ring.

That No3 is the little rubber bung between the fins
Title: Re: Pic for Trigger showing funny ring that goes under three piece oil ring on K0
Post by: MrDavo on February 18, 2016, 10:54:06 AM: Quote from: Bryanj on February 18, 2016, 07:22:45 AM
That No3 is the little rubber bung between the fins

Don't start me wanting a set of those again. I thought I was over it.
Title: Re: Pic for Trigger showing funny ring that goes under three piece oil ring on K0
Post by: AshimotoK0 on February 18, 2016, 12:14:50 PM: Quote from: MrDavo on February 18, 2016, 10:54:06 AM
Quote from: Bryanj on February 18, 2016, 07:22:45 AM
That No3 is the little rubber bung between the fins

Don't start me wanting a set of those again. I thought I was over it.

If you buy a Noboru Packing full gasket set the rubber bungs come with it!
Title: Re: Pic for Trigger showing funny ring that goes under three piece oil ring on K0
Post by: K2-K6 on February 18, 2016, 06:42:15 PM: The top rings always get help to push against the bore by the compression, more of a challenge for rings further down as they're trying to scrape all the oil they can while not raising friction too much.
Title: Re: Pic for Trigger showing funny ring that goes under three piece oil ring on K0
Post by: gtmdriver on February 26, 2016, 09:17:22 PM: It's called an expander ring.