Car starts immediately after the glow plug light goes off. Purrs like kitten for about 10 to 15 seconds and then starts to cough, rattle, nail and sputter with a lot of smoke. As soon as I drive a short distance the idle is perfect again but nailing persists. Nailing gets less after engine is fully warmed up but is still loud. Car drives like a dream, great acceleration and there is no nailing above 1200 rpm.There is no rough idle when the engine is somewhat warm, even after it was parked for hours. Injector nozzles were replaced and the delivery valve seals have been replaced due to a leak but that did not make any difference. Not sure what to look at next.

.Udo.

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1991 300D 2.5 Turbo (185000 miles)
2002 BMW 330 cic (65000 miles)
2000 Vulcan Classic 1500 (47000 miles)

PC Balls?

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

Thats where I've been lead with the same symptoms, or a cylinder with weak compression.

Look here I had similar problems that eluded everyone.

Then we pulled the head ah-ha.

Read this;


300sdl knock / dead miss ??

Took another look at the delivery valves last night and when I took the valves out all 5 cavities below the valves were empty. (when I did this before they stayed filled with diesel) That means the fuel had drained back into the pump and that also explains the starting issue. Starts up fine with the fuel still being in the line between the valve and the injectors and when that is used the rough idle and nailing starts until the pump somewhat catches up. Also explains the nailing due to air getting into the system, or am I wrong here? Does that sound like an air leak and if so what would be a good way to troubleshoot that.

..Udo

__________________
1991 300D 2.5 Turbo (185000 miles)
2002 BMW 330 cic (65000 miles)
2000 Vulcan Classic 1500 (47000 miles)