David,
How do you cut a new seat? Ball end mill?
Cheers,
Bob Haskell
Austin Healey 3000 BN7/BT7 registrar
On 9/4/22 12:16 PM, David Nock wrote:
> 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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