Mac wrote:<<performance is near normal>>
When my '78 240D needed a rebuild - 3 of 4 cyinders had very low compression
and all pitons had broken rings. It drove & started fine until one cold Nov
day it started normally in the AM but when I wanted to leave work it would
not start. All this time it drove fine - although I suspect the "speed" -
if it can be called that in a 240D, diminished slowly over the previous
months.
When I pulled the engine apart I was amazed at how many broken rings were
there - - it's surprised me it would start at all before finally failing.
But during this time, it didn't smoke except under hard acceleration (is
there any other kind in a 240D?) which was only noticable at night. It
always started quickly after the GP light foes off.
So, your 300SD may drive at a level you perceive as normal, but the
performance has probably dropped gradually over the previous months making
it very difficult for you to judge what is normal Vs abnormal. Starting/not
starting seems to be a good way to judge the condition of the engine
although defective glow plugs or a GP relay in bad condition can be seen as
the cause of poor starting.
In any case, having a compression test done - and you may want to consider
an oil analysis - is a better judge
of the condition of the engine -
Good luck --
Larry T (67 MGB, 74 911, 78 240D, 91 300D)
www.youroil.net for Oil Analysis and Weber Parts
Test Results http://members.rennlist.com/oil
PORSCHE POSTERS! youroil.net
Weber Carb Info http://members.rennlist.com/webercarbs
Porsche Road Test http://members.rennlist.com/roadtest/
.
----- Original Message -----
From: "Steve MacSween" <[EMAIL PROTECTED]>
To: "Mercedes Discussion List" <mercedes@okiebenz.com>
Sent: Tuesday, October 03, 2006 2:35 AM
Subject: Re: [MBZ] My OM617 isn't acting too healthy - need input
on 10/3/06 1:25 AM, Jim Cathey at [EMAIL PROTECTED] wrote:
Am I missing something here?
Some rings? A piston top? Definitely sounds bad, sorry for you.
Ah, well, you may well be right. However, what I did not add is that most
of
the time, performance is near normal.
I have driven an SD with a pooched motor, and this one does not feel like
it. Not by a long shot.
Mac
_______________________________________
http://www.okiebenz.com
For new parts see official list sponsor: http://www.buymbparts.com/
For used parts email [EMAIL PROTECTED]
To Unsubscribe or change delivery options go to:
http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
--
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.1.407 / Virus Database: 268.12.11/460 - Release Date: 10/1/2006
