[s-cars] Piston removal

[Scott Justusson]

 Late to this discussion, but I'll put in my .02 expost facto.  I've built many 20vt in situ, and have no problem/s doing it that way.  If you just did honing 20k ago, there is no reason to do it again.  My guide has always been to look for crosshatching in the bores, if you can see it throughout the stroke, it's fine.  If you don't, take a set of monkey-balls and run a quick hone down the bores.  I learned this, not on the I5, but rebuilding engines with my dad decades ago.  Total time is under 5 minutes for that procedure, if it's even needed.

I have a 20vt turbo engine in one of my cars that I'm doing this exact surgery to, in situ.  I will be doing the same thing in a couple weeks to another.  I pull the head as complete as it can be, take a look at the bores, and pop in pistons with new rings and rod bearings.  Drop the head back down, and call it good.  I have done this several times to 20vt cars and 10vt cars alike, without a crosshatch related failure.  At 20k, the crosshatching should be all but perfect, IMO/E.

Keep it SS I say.

Scott J
20vt aplenty


 

 

-----Original Message-----
From: David Giannandrea <david.giannandrea at sbcglobal.net>
To: s-car-list at audifans.com
Sent: Tue, Jun 7, 2011 7:22 pm
Subject: Re: [s-cars] Piston removal



Thanks Cody, Vittorio, Chris,

You've convinced me to take out the engine. Although it was honed about
20,000 miles ago (1st rebuild, cheap piston rings), I think I'll make the
appropriate effort for such a classic car.

David G
1993 S4

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