[Healeys] Overdrive Piston Rings

[jomar healey]

 David
  I do not have the overdrive out of the car and am working from jack stands.  For now I'm adding the larger piston and a new pump ball and spring.  I will seat the pump ball as you have suggested.  If this doesn't work I'll pull the drive over the winter for a complete rebuild.  You would think that after working properly for only 70 years they would have had better build quality when they were originally produced.
Joe
Any thoughts on the springs?
    On Sunday, September 4, 2022, 12:20:19 PM EDT, David Nock <healeydoc at gmail.com> 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 at 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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