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Water loss
Posted: Mon Oct 03, 2016 1:25 pm
by teammccrory
Folks
My 2006 X3 D MSport is losing water. My mechanic (BMW trained but not an actual BMW garage) says the head gasket on these never gives an bother. Is he right? I think I can see steam from the exhaust. Any thoughts, please?
Thanks
Stephen
Re: Water loss
Posted: Mon Oct 03, 2016 6:19 pm
by X5Sport
Very rare, but like anything, possible. How fast are you losing it?
Worth taking the oil cap off and seeing if there is any 'mayonnaise' on it. That indicates water in the oil.
You will get steam from the exhaust until the engine/exhaust fully warm up.
Could be a leaking pressure cap on the overflow bottle which will allow steam to escape when at full temp.
Could also be a leaking overflow reservoir.
Re: Water loss
Posted: Mon Oct 03, 2016 8:02 pm
by jagr
Check around the thermostats and front water hoses as any little crack under pressure can lose more than you would imagine.
Re: Water loss
Posted: Mon Oct 03, 2016 8:43 pm
by MarkG_M3CP
Sounds like a faulty EGR Valve or cooler - very common on BMW diesels, the coolant leaks into the exhaust manifold. I would have it checked for cracks etc soon - my 335 almost left be stranded when it finally failed.
Have you experienced any misfiring or coughing, the car, not you
as this is another symptom.