Re: URQ sorting out - Valve seals

["David G" <daveglu@hotmail.com>]

>
> Huw,
>
> Its been a long time since I had to do any valve stem seal replacement.
> Couple of DIY  incl. shims back in the pre. 85 Hydraulic lifter days
before
> teflon seals.  If it is the same as the old 1.6 l - 4 cyl VW AUDI motors,
> then you can do this.  Just make sure the air fitting is screwed in tight,
> Valves are positively closed on the cyl. your working on - 30-40 PSI
should
> suffice.   Make sure car is blocked and in gear - the pressure could cause
> the motor to turn when you least expect.  If you were to loose pressure -
> Off with the Head!
>
> Regards,
>
> Ben Swann
> Tres Quattros

  There are two options, either you place the engine at TDC in which you
have to be very carefull with the pressure or it will turn over, but the
valves won't drop in if you loose the seal or the pressure (only a little
ways till they are held up by the piston.
 Or you do it at BDC in which you can use as much pressure as you
(reasonably) want.
 Anywhere inbetween and you will be working with option #2
  Dave
http://www.pelkie.com/mycars.htm