Don't know if this will help -
I bought a MB Technical Data manual after I bought my W124 - it includes
info for the 140 - it says:
1. permissible deviation pf cy bores from cyl shape - New Value = 0.00 -
0.014 wear limit 0.05.
and
2. wear in driving or transverse direction at upper reversing limit of 1st
piston ring - 0.20 (diesel) 0.10 (Gas)
I'm sure these are in mm's. It seems odd (to me) the gas a lower wear
limit.
HTHs
LarryT
91 300D
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--------------------------------------------------
From: "Mitch Haley" <m...@voyager.net>
Sent: Monday, October 12, 2009 7:30 AM
To: "Mercedes Discussion List" <mercedes@okiebenz.com>
Subject: Re: [MBZ] Bore measurements on 140 SD
Loren Faeth wrote:
IMHO, you have a problem with a bent rod on #1. It is bent enough so
that I predict a short life after the engine is running again , if you
don't address the #1 rod at least. Seems to me what you describe is in
the neighborhood of 0.010 inch or so, (maybe more) and that is a problem.
I concur. If five pistons stand proud of the block, and one piston is
recessed, and you can detect that by feel, there's something wrong with
that one cylinder.
When you add to that the fact that the most worn cylinder is the same one
with the short rod, and it's the cylinder that's famous for bending its
rod, I'd say replace that rod and hope you caught it quick enough so that
cylinder still seals ok. If one cylinder out of six makes 95% of the power
of the others, the engine as a whole shouldn't run too badly.
Mitch.
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