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Re: [T3] Bottom-end Rebuild


--- Jim Adney <jadney@vwtype3.org> wrote:

> > Inside the head exchangers on 3&4 was chunks of
> > charcoal. On the other side inside the HE was some
> > kind of funny type of acorn or nut that I've found
> > throughout the car. I imagine the charcoal on 3&4
> was
> > once similar acorns. 
> 
> I assume the nuts were in the outer half of the HEs,
> not in the exhaust path. 
> Squirrels often seem to leave me "offerings," too. I
> usually find walnuts on 
> top of the air cleaner.  ;-)

I've probably removed about 50-60 of these from
various otherwise hard-to-reach parts of the car so
far. I still have no idea what they are.

> Is it possible that what you're seeing is just the
> space above where the top 
> ring sweeps?

Yes, that's probably it... 

> The most important thing to do is the heads. I'd
> just get yours rebuilt (NOT 
> exchanged.) RIMCO can do a very good job of this if
> you don't want to do it, or 
> if there's no one in your area that you trust.

No one that I know of, but I have another question
related to this. I already have a set of new (not
rebuilt) stock 1600 FI heads. Are my old heads better
to use than these? If so, why? I also have another set
of old 1600 FI heads that have cracks between the
spark plug hole and each valve. If these were to be
welded & cut, are they *still* better than new stock
heads or exchanges? 

> I often clean up the old pistons, clean the ring
> grooves, clean up and hone the 
> cylinders and install new rings. Check the wear by
> inserting a new ring, 
> squaring it up in the bore with a bare piston and
> measuring the ring gap.

Do cast iron cylinders warp at all with heat? If I
scrape the rust & gunk off these should I use these
instead of a new set of 85.5 KS cyls/pistons that I
have or should I just use the new ones?

> You should also check the piston skirt clearance.

What am I looking for with this? I'm keeping
everything stock...

> I prefer to go the whole 9 years,
> including case savers (send to 
> RIMCO.) I also prefer to do as much of the work
> myself because I don't trust 
> someone else to be as careful with my parts as I
> would be.

I'm starting to get the notion that a lot of people
clean/recondition and re-use old parts instead of just
replacing them (assuming they're useable obviously).
If that's most always a wise thing to do for heads,
case, etc., it's a notion I'm going to have to adjust
to since with everything else (non-VW) I'm usually
thinking a new replacement is usually better...

Aaron 

=====
--------------------------------------------
   1971 FI AT Squareback
http://www.tiserves.com/VW/
   vw_variant71@yahoo.com
--------------------------------------------

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