Leaking coolant when the Temps drop
 

Haven't driven in a few days. And want do I see? Any help guys?
Dripshttps://uploads.tapatalk-cdn.com/201...d1b99bd561.jpg

Having the same issue too. Is your the 4.8?

That's a LOT of coolant should be easy to find the leak!

It doesn't leak when running. Only when it sits. I'll get under there and look. Changed reservoir cap already. So much for simple fix!
Yes it's the hog. 4.8

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Take your intake off and have a feel around. feel under your water pump, check the hoses, bottom of the coolant expansion tank. If you don't find any leaks there, move onto the valley pan and exchange pipe.

This thread may help >
https://xoutpost.com/bmw-sav-forums/...icks-info.html

My 08 6cyl did that as well....turned out to be the expansion tank.

Finally, someone with a ray of hope. But she is at 100k miles.... right around the time for colling system refresh. My guess is I'll be replacing stuff until I get to the valley pan/ pipe job.
:popcorn:

Where do you get the cooling system o-ring kit??

Got this one. Hope its right. I know its ebay. But how bad can you mess up o-rings?

BMW Cooling System Heater Radiator Hose O-Rings: X3 X5 2.5 3.0 4.4 4.6 4.8 | eBay

Any luck locating leak?

All of us with the 4.8i should be asking BMW that question, seems they have shown us several examples of how it can be done...
The Germans are GREAT at Engineering, but not so much on design for mass production.

That said, LOVE my 4.8!

Looked around a bit with impending snowmageddon 2017. No weep hole leaks!!
Upper radiator hose is wet.
Part ordered.
Let's hope a few hoses solves it......


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Uh oh. Started her up and leaks stop. But there is also a rear engine leak.
Strangest thing is it only happens when sitting and not running and warmed up. Sounds like a worn out oring somewhere! Hope it's not in the valley!!

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I got all the leaks on the N62
 

I have leaks as well only leaks when sitting, also very strong wheel sound from the front Passenger wheel side. ALSO when I brake hard or stand still on an slope upward I get a burning oil smell.

Took it to a local Indy shop and discovered
Valley Pan leaking oil
The passenger and driver front wheel hubs shot, the drivers side almost seized
Both Valve covers are leaking oil
Upper timing cover gaskets leaking

The engine looks like new would never know all this was all happening

My local Indy shop said will take 3 days pulling engine will need to take 3/4 of the engine apart These guys are certified BMW ASE mechanic

They quoted me $2260 for the entire job I SAID DO IT........

Getting it back on Monday March 20th they had it from March 15th.

Keep you posted

That's a great price for all of that work!!

Driving the car daily. No leaks after upper and lower radiator hose change!!!

But now I have the mysterious disappearing coolant? Low coolant in reservoir.

Ground is not wet.

But where is the coolant going?

I'm getting ready to tear into it and do the Valley pan and tube.

Are you sure that isn't just the result of the coolant system purging the last bits of air from changing the hoses?

My money is on the valley pan gasket.

This was my thought. I haven't done any coolant work on the X5 yet, but I know on my E36 it's pretty common to have to top off a couple times even after bleeding the system.

had to fill about 1/4 gallon. 1st time. My level sensor not working from PO. I think he knew and traded it due to the dealer quote of valley pan.

But I'm going in expecting this. So, I'm ok with it.

We'll see. If I need to add a second time, the coolant pipe and valley pan are coming out

Just crossed 100k miles

Checked this AM... not low but not where I topped it off yesterday.

2nd day. Coolant level has stabilized and remains the same as yesterday!
Looks like I won't be joining Valley pan club yet. Or it was done by PO.

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3rd day.
Coolant level still the same but I haven't let it sit a couple days either.
Nor is it freezing in DC metro anymore.

Hoping I don't have to revisit when the temps drop during winter

We'll keep our collective fingers crossed. ��

4th day. Still within min / max. Maybe a little lower but it's a bunch colder today.
Going to put this valley pan on hold for now.
Thanks everyone!!

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Update. I'm still good. Before morning start, still within min max.

Moving on to the timing covers and valve covers. Prolonged idle and smoke

Uh Oh!

Added about 8 - 10 ozs of coolant.

Valley pan going to get done.

At least you made it another 6 months. :D

Since you are going so far as to replace the valley pan, I strongly recommend you do the coolant transfer pipe that is under the valley pan at the same time! Just did mine and isn't too difficult and love the piece of mind. I used the All German Auto (AGA) expandable pipe. A bit more expensive than the Uro and another copy, but very well made. I highly doubt I'll have to replace this again.

Let me know how it goes I have the same exact situation been following up on ur thread . So far been getting away with it but valley pan is leaking forsure and I will also do the coolant pipe while the pan is off I guess . I'm getting away with it for now

Just did the pan and pipe. It was spewing so much coolant I couldn't drive more than a couple blocks.
The front seal was so soft like a rolled up wet shop towel. Disintegrated. Didnt even have to use pliers to pry it out.
Used the Uro pipe.
Hardest part was getting front seal perfectly flat. I also used all 3 .2mm shims. I should have put them next to the lockring vs at end of pipe like instructed.
Next project is valve covers and valve seals.

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