Hi Jim,

The collapsible variety (telescoping) have two internal o-rings and a
spring to provide tension, those were the o-rings I was wondering about.
The nice thing about them is that they can be installed without pulling a
head & are easily removed. I have new seals for the ends that came in my
Reinz kit. Thanks for the tip on rejuvenating the old ones, I will be
re-using some of them.

Cheers, Tom

On Sun, Sep 9, 2012 at 7:21 PM, Jim Felder <jim.felder@gmail.com> wrote:

> Back in the day, the accepted practice for rejuvenating pushrod tubes on an
> aircooled vw was to roll it on a table with a butter knife pressed into
> each accordion groove, giving the tube back its length and therefore
> pressure on the o-rings.
>
> I would at least replace the o-rings, cheap as they are and as much work as
> it is to pull them.
>
> Jim
>
>