when I did my E39's M62 the other nipple had a vacuum cap on it.

@TECN1K - From what I can see, it wouldn't matter which is capped since they both run to the same place correct?

I just ran to the garage to look at mine. Ill send a photo in a minute. I have two nipples on mine too (I'm talking about my BMW:bustingup). But the one to the upper left (facing the rear of the CCV as though in the driver's seat)....is capped off from the factory. Thus, I only have one vacuum line going to it. I believe you either lost the cap, or it is otherwise blocked off.

@Spanker - Yes, thank you for confirming! Confirming both...that you're talking about nipples on the BMW (phew!) and that one is capped. I can dig through the old parts and hopefully I still have it. Either that, or gasket maker to the rescue again!

Just to be certain and to give you an idea of what the cap looks like....

@Spanker - OK, sweet! That's exactly what I needed and that's the same side I thought it should be on. Thank you very much for checking for me!

:thumbup:

OK, got everything back on. UPS finally delivered my parts at 8:45 last night...that was irritating.

Runs much better, everything seems to be good, EXCEPT temp gauge almost immediately goes full RED and the OBC shows -128* C. Grrr...

I found another thread that seems to indicate the thermostat is most likely the culprit. Double and triple-checked the connections. Everything is good. Truck gets up to temp, no issues, hot air coming out of the vents.

Now, if I watch, the temp gauge does read correctly for about 1 second when you turn the key to ON, before it jumps up to full red. I was able to watch the gauge change as the X5 warmed up, but something is not working correctly causing the full red condition. Would this be the thermostat or temp sensor? I'm leaning towards thermostat since the gauge does read correctly for a second.

Thoughts?

Try this, fairly certain it's your issue... My was doing the same, sit on cold for a second, the reach for the stars, blowing hot air fine once it warmed up, etc...

http://www.xoutpost.com/bmw-sav-foru...ter-fixed.html

@mam - Thanks for the heads up. I just started driving it since I knew it wasn't over-heating, and a couple miles down the road it started working. So, I'll watch it and see if it decides to go insane again, and if so I'll try the reset as you did.

Now I just need to figure out the CEL. Seems like the X5 is idling low, and there's a slight rhythmic gallop that wasn't there, but otherwise everything is working fine.