[s-cars] Engine Rebuild Questions

[djdawson2 at aol.com]

Keith,
Just don't let him hone the block in the car... the only way he can do that is with a ball hone.  While a ball hone might be better than nothing, it is not a precision tool that will result in truly round cylinder bores.  To do a hone properly, the block should be stripped, and a torque plate installed to simulate the presence of a cylinder head.  All this requires the engine to be out of the car.
Good luck,
Dave
 
-----Original Message-----
From: Keith Maddock <keith.maddock at gmail.com>
To: calvinlc at earthlink.net <calvinlc at earthlink.net>
Cc: Djdawson2 at aol.com; s-car-list at audifans.com
Sent: Fri, 29 Apr 2005 00:27:46 -0400
Subject: Re: [s-cars] Engine Rebuild Questions


I don't have the facilities or skills to do a full engine rebuild
myself, so this is all being done at shop which has a lot of
experience with German engines.  This also explains the parts prices
being slightly marked up, but the benefit to this is that there is a
warranty with the whole job.  I hadn't discussed honing with the
mechanic before; I will make a point to do that.

Thanks to all for all the tips and information.

Cheers,
Keith 

On 4/29/05, calvinlc at earthlink.net <calvinlc at earthlink.net> wrote:
> I totally agree with Dave, here.  The worst part about the engine rebuild is
> having to do it at all.  Once you get past that point do it right.  Hone the
> block properly, even get a tad bit oversized rings if need be after the hone
> to guarantee the right piston ring gap when assembled.  DO your research on
> the machine shop you choose...anybody can do a 350 Chevy, but a 2.2L
> Audi....As far as the piston choices I have seen mentioned JE makes a heck
> of a piston for just about anything with an internal combustion engine.
> They are really top notch pieces.  I run them in my '72 Firebird.
> --Calvin
> 
> 
> -----Original Message-----
> From: s-car-list-bounces at audifans.com
> [mailto:s-car-list-bounces at audifans.com]On Behalf Of Djdawson2 at aol.com
> Sent: Thursday, April 28, 2005 6:11 PM
> To: keith at maddock.com; s-car-list at audifans.com
> Subject: Re: [s-cars] Engine Rebuild Questions
> 
> In a message dated 4/28/2005 11:01:52 AM Mountain Standard Time,
> keith.maddock at gmail.com writes:
> 
> 1) Think  it's worth buying new valves, or are these 300k mile parts?
> Cost here is  $365.  Not thinking it's much labor savings since valve
> guides are  being replaced.
> 
> No, not unless the stems are heavily worn.
> 
> 2) I'm getting quoted $360 for the main bearing set alone, is  that
> reasonable??
> 
> No, way high.
> 
> 3) about $500 total, parts+labor to remove, re-ring,  re-install
> pistons...worth it?
> 
> An "in frame" rebuild minus the hone?  Wouldn't be my first  choice.  I
> would
> suggest you either simply replace the rod bearings and  recondition the head
> (assuming there wasn't any crank journal damage), or pull  it all and do it
> right.  I would not replace the rings without honing the  cylinders... you
> could
> end up with worse than you have now.  I would either  have it honed and
> replace the rings, or skip the hone and keep the rings you  have.
> 
> Personally, I would pull it, have the block checked and honed (no ball
> hones
> please), and then reassemble using new parts.  I would not replace  the
> pistons, unless the block can't take the hone (too loose)... which  is
> uncommon on
> Audi blocks with those miles.
> HTH,
> Dave
> 
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