[W126 Coupe] Hard starting diesel

[Mister McGoo]

Rich; Hah!  One of those rare 300SDC models!  That's quite a conversion!  Too bad someone didn't use an '86 or '87 603 engine with greater power. As you know, most often a warm engine will start fine when a cold engine will not, indicating a glow plug problem.  You have the opposite problem?  
 Is there any smell of diesel present?  Check for leaks in injection lines or bypass hoses.  The problem may be a restriction in the air filter or the fuel filters.  Do you know when these were last changed?  If you suspect the air cleaner might be clogged, leave it out (or switch with your other car) and see if the problem is solved.  If you don't have any records, I'd change air and fuel filters as a starting point.  - Bellamy


From: rsjaffe1 at msn.comTo: MBCOUPES at MBCOUPES.COMDate: Mon, 19 Nov 2007 21:20:27 -0500Subject: [W126 Coupe] Hard starting diesel



Hello all,
 
I came across an 84 500 SEC that has had the V8 (broken timing belt) replaced with a 617 diesel motor and trans out of an 84 300 SD. If the car has been sitting a while, it starts fine. However, after shutting the car off, it does not want to start again when trying to restart after a few minutes. The starter turns the motor over but it will not fire.  But after sitting for a while, it starts just fine. Is this a problem with the glow plugs? Any ideas? I have not have this type of problem with my gasoline SEC or my 83 300 SD.
 
Thanks,
 
Rich Jaffe
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