The wide rings are expander rings and go first. Then the narrow rings go on. Do
you have the pump out. If so take a close looks at the ball seat. They usually
wear on one side, and will need to have a new seat cut so the check ball seats
good on the pump body.
This is a common problem causing low Previn the overdrive
David Nock
Sent from my iPhone
> On Sep 4, 2022, at 8:58 AM, Joseph Costa via Healeys <healeys@autox.team.net>
> wrote:
>
> 
> I have the larger overdrive piston from BCS -note to John many thanks for
> getting it here Friday - I have 4 thin rings and 2 larger rings. Do the
> larger rings go on first and then the thinner over them. I assume I should
> space them as piston rings are spaced.
>
> Second, I have a new spring and ball for the pump. The springs are the same
> length but the new spring has fewer coils. Which is the better option to use?
>
> TIA
> Joe
> BN1 #923
> 100M
> BJ8
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