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Old 10-24-2005, 01:01 PM
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Join Date: Oct 2005
Posts: 32
93 300D 2.5 starts fine, then bad idle, smoke, until engine get warm, then runs great

Just bought a 1993 300D from down south. Here in Colorado, when cold (30 degrees F) it starts, runs fine for 20 seconds, then begins the clunking nailing sound and has heavy smoking at idle.

Once the car warms up, it's just fine, and the car runs and idles very well.

I did notice a tiny fuel leak at two of the injectors as well as some air bubles at the base of one of the injectors.

My theory so far is that the injector seals at least need replacement. Any help or advice would be appreciated.

Also, where is a good place for seals or injectors and does anyone have a link for injector removal/replace procedures?


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Old 10-24-2005, 09:21 PM
t walgamuth's Avatar
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 36,088
i am guessing

an issue with the glow plugs. they are supposed to flash on and off or stay on for a while after startup, i think.

sounds like classic glow plug problems.

tom w

[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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