Quote:
Originally Posted by Chris_87_300D
Please see (listen to) the attached PDF which contains a sound file of my 603 engine (1987 300d turbo).
I recently had the injectors rebuilt - first time ever after around 335k miles (unless it was done in the first 50k before I have records). The injectors were at the very bottom of the pressure range spec (all between 133-135 bar) - they were set after rebuild at the mid of the factory range (142 bar +/- 2 bar). I also adjusted the alda as per the many other threads.
The thing drives like a champ - seems to have more power, a bit quicker, etc. but, it sounds very noisy vs. what I recall before my "upgrade". It also smokes a little just sitting at idle which I don't recall seeing before and runs a little rough (sitting in the cabin).
I'd appreciate hearing some comments about the sound - I can live with it if it's not the sound of something wrong or going wrong...
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I can't hear anything (never have seen a sound in a pdf before and can't find yours) but the smoke is, just based on this post, entirely normal. Diesel smoke is caused simply by the injectors providing slightly more (ranging up to extensively more) fuel than the available air can burn. At idle, almost ALL diesels smoke if they are configured to deliver their "normal" amount of power under acceleration rather than a limited amount. You've just had your injectors brought up to spec from previously under-delivering fuel, and by adjusting the alda out, you've SIGNIFICANTLY increased the amount of fuel your engine has access to. This is a good thing for acceleration, but does increase smoke slightly.
Point is, wouldn't worry about the smoke. Nine times out of ten, when you get a seat massage from the engine's idle, it's the motor mounts getting worn out. You can speed up the idle a hundred rpm or so and the shaking should be "hidden" although not "fixed".
No idea about the sound since I can't hear it.
09-20-2010, 11:26 PM
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