[Kraftwerk]

IP and Injectors were taken to a specialist Bosch VE-pump shop and thoroughly examined while the rest of the engine was being rebuild, and the shop owner (working with those a lifetime) found them all to be in great shape.
He did the timing matching when the pump went back on the assembled engine, and everything really worked fine untill recently, as I said, for over 15.000 miles it always started, never smoked, etc.

Rattling...no, not really. I've tried, and it sounded like something in front part of the engine compartment, that's the most specific I managed to get. Sometimes it seems to me that the exhaust gasket is leaquing, but it's also just 15k miles from brand new, so I don't see a way that could happen. Whatsoever, it is related to some moving part since it fluctuates in sync with the engine's revolutions.

Ambient temperature...it's rainy these days and mostly around 20'C, but most of the time in the last few months it's been 30-something, even over 40' Celsius.
Last winter had some really harsh moments of even -20'C, but all that time everything was fine...took longer to warm up than nowdays, obviously, but never smoked or shaked as it does now.

I didn't really measure precisely...I guess if I just turned it on and left it idling, it would reach it in some 10 minutes or so, whereas when I leave it idle for a minute or two and take off, it reaches it in about a kilometer or so. Never goes beyond.

This is European TIC engine, but I believe it is the same thing, it has "slow" glow-plugs and thermostatic acutator, though I'm not sure about advanced timing and opened throttle...might have been earlier, but now everything is messed up when it's cold, it acts like timing is far off retarded and throttle too closed...