Pushrod metal itself was my first thought though I was leaning toward
expansion/contraction (heat cycling) causing the tube to expand and crush
the seal then contract and cause an even bigger oil leak.

Can one successfully anneal the push rod metal at bellows or would that mean
"entering a world of pain" ?

(apologies to "The Dude". [movie reference] )

Neil.

On 6/22/16, Stuart MacMillan <stuartmacm@gmail.com> wrote:

> .....  I'll bet the old pushrod tubes are the problem, not the seals.
> They may get less malleable as they  age, and after stretching them for
> reuse they may not have the flexibility they once had, and that leads to too
> much pressure on the seals.

--
Neil n

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