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X5 E70 (2007 - 2013)
E70 BMW X5 produced between 2007 and 2013. Discuss the E70 X5 with other BMW owners here.

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  #1  
Old 09-26-2012, 04:17 AM
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ductman ductman is offline
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Should I be concerned ( Opinions )

I wrote back in April concerning adding about 2-3 ounces of coolant, I do check my coolant every 3-4 weeks always when the vehicle has been sitting at least 24 hours, when I do check , the level is right at the min and not between min and max according to the owners manual, I do bring it up between min and max ( only about 2 ounces )but this seems to be a common occurence on a monthly basis when I do check the coolant, I have been on two 1200 mile road trips with no issues whatsover, the dealer pressure tested the cooling system back in April and found no leaks and I have myself looked at every connection for any white residue, I have never had to top off any vehicles ever and when doing an internet search this seems to be more common with BMW , is this normal ? Should I be concerned with topping off the coolant about 2 ounces monthly ? I thought in a sealed system that their should be no evaparation ? I am topping off with distilled water and a mix of BMW coolant. Any thoughts on this would be greatly appreciated.
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  #2  
Old 09-26-2012, 08:01 AM
ard ard is online now
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Pull an oil sample and do a used oil analysis. Coolant being exhausted past a leaky gasket will leave a telltale signature in the oil.

Or you could not worry about it. how long you plan on owning this one out of warranty?

A
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Old 09-26-2012, 08:23 AM
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Emission Emission is offline
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Quote:
Originally Posted by ard View Post
Pull an oil sample and do a used oil analysis. Coolant being exhausted past a leaky gasket will leave a telltale signature in the oil.

Or you could not worry about it. how long you plan on owning this one out of warranty?

A
+1

After about 10,000 miles I have yet to add oil to our X5 35d, but I have added a splash of distilled water to the coolant reservoir just to top it off.

- Mike
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Old 09-26-2012, 08:32 AM
ard ard is online now
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And to clarify- coolant leaking into the oil will 'milkshake', and be pretty apparent. You are getting coolant lost without oil changes (I assume). Just the vaporizaton of coolant - microscopic amounts- will show up in a UOA. Or it could just vapor escaping without any telltake white residue, which if so I would not be overly concerned., But rule out the oil.

Blackstone UOA, pretty cheap.
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Old 09-26-2012, 08:56 AM
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ductman ductman is offline
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Quote:
Originally Posted by ard View Post
Pull an oil sample and do a used oil analysis. Coolant being exhausted past a leaky gasket will leave a telltale signature in the oil.

Or you could not worry about it. how long you plan on owning this one out of warranty?

A
I have the BMW extended powertrain 5/100k, a little over 2 years left on the lease, probably have about 80k by the end so I guess I am covered at least on that issue, no milky foam in oil nor under the filler cap, 2-1200 mile roadtrips completed , no issues.
I also assume that a head gasket issue would lead to overheating from the exhaust pressurizing the coolant system. Might have the dealer do another pressure test at my next service.
I also wonder how many members actually check their coolant since it is in a closed tank and just wait for the low coolant light,
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Last edited by ductman; 09-26-2012 at 09:00 AM.
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