First start 3.0 d

[brunox5]

Hi everybody,
J have x5 3.0 d 2001 year 200 000km.
When engine cold on firist start there some white smoke about 2-3 sec and engine is not work good, and when control light turn off sound and everting is perfect, my engine not lose oil or wather, after he warm up every other start up is ok.
Thank for all advisses.

[Moments]

Hi brunox5,
I had an E39 525tds with 300,000km and it was exactly the same as you describe. I checked the glow plugs and 3 out of six had failed: once all glow plugs had been replaced, it started and ran perfectly again.
You can use a multimeter to check the resistance of the plugs, I think there's a control box somewhere where the six connectors all arrive in one place - you can probe from there (on my E39 this was under a filter housing).
That's where I'd recommend you start, anyway!
Good luck

[X5Sport]

As has been said, the first place to start is probably whether your glow plugs are working - or at least, are you allowing time for them to work? They do take a couple of seconds to warm up before the key is turned.

On the rare occasions we get temps well below freezing (-10degC and below) in the UK every diesel I have owned (7 so far) has emitted just a tiny puff as it first starts and has then run fine, but if the glow plugs don't work then it is much more smoke and can take a while to actually fire. Are you having any trouble getting it to start? It should go with just a very quick turn of the starter.

In warm weather the glowplugs don't usually engage. I'm not certain of the absolute cutoff temp, but I think it could be +5C. Above it then no glow, but below it the plugs will come on and you should see a message saying 'Pre-Heating' in the OBC display on the instrument cluster. Are you seeing any message if the temp is below +5C?

[brunox5]

Thanks gays,Temperature these days in Serbia about 25 C ,I also allow glow plug to work before start engine. It good sugestion to check all glow plug, and a I will do that.