[T3] Trouble home from Bugorama

[Keith Park]

YOu may have the chinese cylinder kit, and there have been numerous problems
with them, the new Mahle's sold now are actually chinese AA's.  Try to
source old brazilian Mahles but in either case EVERYTHING has to be checked,
bore size, roundness, no defects in the walls, everything on the pistons and
the ring fit in the cylinders (end gap).

Id be inclined to get a set of 1500 cylinders and bore them out to 85.45 and
fit a good quality piston to them, or bore out an OEM 1600 set and fit
quality pistons to them.

Keith


Topnotch Restorations
topnotch at nycap.rr.com
http://www.a383ina68.addr.com/radiorest/main.htm
71 Squareback  "Hothe"
65 Notchback  "El Baja Rojo"
93 RX7  "Redstur"
87 Golf  "Winterat"
 

-----Original Message-----
From: type3-vwtype3.org [mailto:type3-vwtype3.org-bounces at lists.vwtype3.org]
On Behalf Of Jacob Adam Schroeder
Sent: Friday, November 06, 2015 1:32 PM
To: type3 at vwtype3.org
Subject: Re: [T3] Trouble home from Bugorama

On Wed, Nov 4, 2015 at 7:49 AM, Jim Adney <jadney at vwtype3.org> wrote:

> Once this is done, you can put everything back together, or you can
> consider doing one more thing: Remove the #2 P/C and check the bore
> for excess wear. The concern here would be that if #2 was not firing
> for a long time, while gas was still coming in, the cylinder wall and
> the rings might have gotten extremely worn.
>
>
I read in the Muir book (Bentley doesn't speak to this issue) that if one
were just servicing the heads then you should be very careful to make sure
the cylinders do not pull away from the case when removing the cylinder
head.  What is the basis for this statement?  Is it just that it is more a
PITA if it slips off?

So here is my naive question: If I pull the #2 P/C to check the bore, aside
from keeping the internals clean, is there anything else I need to be
concerned about when I reinstall the P/C again (whether I reuse or get a
new one)?


> Are these the OG 85.5 mm P/Cs? If so, someone may have a used
> replacement that would be better than yours.
>

Yes, they are 85.5.  My engine builder sourced new ones from someplace.

Part of me is of the mindset that if I already have the engine out and it
will take minimal effort at this point to replace the P/Cs that perhaps
that is wise.  It is not like I am using OG P/Cs and I think my builder
only charged me ~ $165 for the current set--so they are likely a budget set
as-is.

I will likely do what you suggest, Jim, and start with the #2 P/C and check
its bore.  If it shows too much wear, I am inclined to replace all 4.  If I
go that route, what kind should I buy for a stock application (forged vs.
cast) and new chinese-made vs. old (and probably expensive) german (or
maybe brazilian)?
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