Re: [T3] Running in new Pistons

["Keith Park" <topnotch@nycap.rr.com>]

2000 RPM is OK for  I forget how long (Berg can tell you).  This is to work
harden the cam, not for the rings.  YEa, you dont want to idle it strait
off.  Ive got 89K on my stocker right now as I was careful when I broke it
in... still has excellent compression and oil pressure.

Nearly anybody with a machine shop can change the guides, its so easy now...
dont skimp on the exaust valves and guides.

Keith

>
> Will do! There seems to be a bit of a split of opinions concerning running
> in though (not on this list though!). I've definitely heard that the first
> few minutes are crucial and that the engine should be run hardish (2000
rpm
> continuous) to bed the rings. Maybe that was just for Porsche engines
> though?
>
> > > Also I'm going to replace some valves. The guides seem OK but again
for
> > > peace of mind I'd like to replace the exhausts
> >
> > DONT go CHEAP on the valves!!!  replace ALL the guides, and at least the
> > exaust valves but Id do the intakes too...  these heads have a hard time
> > just holding up for 60K miles so you sure dont want to put something of
> less
> > quality than stock in there, the results can be very expensive!
> >
>
> Looking at my engine now its in pieces it all looks in remarkably good
> condition. Since I know that its the original case I'm guessing that it
has
> been rebuilt and not that long ago. The heads are perfect and the valves
are
> all vw stamped. I checked the valve rock as per haynes and all the inlets
> are 0.2mm (which is better than the new spec!) and the exhausts on 1&2 are
> 0.35mm, and 0.55mm on 3&4. The limit according to Haynes is 0.8mm so they
> are still looking good. The heads show no wear or burning and the seats
are
> all bright metal to metal contact.
>
> I know I should now I have the chance, but do I really need to change the
> guides? Thing is I can't really leave the car where it is for too long,
and
> I'm working, and I don't know anywhere local that I'd trust to do this,
and
> I'm frightened to try it myself.
>
> I guess what I should do is get a second engine and rebuild that in my own
> time to perfection and get this one back together for now as best I can in
> the time I've got (has to be running next week) and do a swap as soon as
the
> other is ready and sort this one out properly.
>
> More time, more space!
>
> Thanks
> Mark Seaton, '73 Fasty, London
>
>
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