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Originally Posted by P.E.Haiges
Bohdi,
Its normal for older colder Diesel engines to run rough for a short time until they warm up inside. Most of mine do. As long as they smooth out and run OK after reasonable time, I wouldn't worry about it.
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Well, I now have some curious info regarding two older diesels that don't exhibit this behavior.
The SD, with new valves and new prechambers starts and idles as though it was 70 degrees outside. Just a bit of hunting and it's dead smooth.
The new SDL, with a new #22 cylinder head also starts and idles dead smooth, at 30°F. ambients.
Rather interesting what new valves will do for these old engines.