normal wear in MC block ?

[Tex Terry, II]

Ed - Just out of curiousity, and for my own learning, what kind of
condition is the # 3 cylinder in?  It seems to me that if you have a
problem on both sides of the # 3 (liner wall of 4-3 and liner wall of 3-2),
that maybe the # 3 is a contributing factor (maybe excessive heat causing
oil thinning, then attributing to extra wear patterns).  But all this is
just a guess, so I am asking so I can learn.  Tex.  

> 
> On Mon, 09 July 2001, ed armstrong wrote:
> 
> 
> Hi gang,
> 
> My turbo project is crawling along but I'm making
> progress. 
> 
> Recently I took the head off the MC-1 for
> refurbishment at the machinists and this gave me the
> opportunity to inspect the top of the block. There was
> one item I found that was a little disconcerting.
> 
> The cylinder wall (sleeve) in cylinder #4 is really
> worn in the region between #4 and #3. It is only about
> 1 mm thick, about half the thickness of many other
> cylinder sleeves. The area between #3 and #2 is
> similar. I realize this is the area with the highest
> heat concentration where one would expect more wear
> but does this sound right for a turbo motor with 140K
> miles on it ?? Any opinions as to if this motor has
> another 100K miles of life left in it ?
> 
> The Bently manual calls for measuring the "out of
> round" of each cylinder at three depth locations but I
> don't have the proper tools to do this accurately.
> 
> Thanks for any opinions.
> 
> 
>  -ed