Coolant leak
11-05-2008, 04:24 PM
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I am losing coolant in mt 05 545i-I have checked resv and hoses. Yesterday a big puddle under the car/about 1 pint or more. No clue what area it is coming from. I topped it off this am and ran it with heat on and no leaks. Possible overflow hose-the eng compt is clean. Thanks for any ideas.
11-06-2008, 08:22 AM
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My Ride: My ex-ride: EU '08 LCI 520dA. Space Grey, Sport Seats in Black Leather/Fabric Anthracite, Sport Steering Wheel, A/C with Extended Features, Hi-Fi Speakers, Cup Holders, Cruise with Braking function, Folding Rear Seats, Xenons, Park Distance Control.
It's a bitch to try to find out where a small leak is.
Probable a hose leak or a loose radiator outlet screw, but never heard about it here.
If you can't locate the leak, best would be to take your car to the dealers.
It could also be a defected valve gasket or thermostat, but those should be recognized
by the engine overheating.
Probable a hose leak or a loose radiator outlet screw, but never heard about it here.
If you can't locate the leak, best would be to take your car to the dealers.
It could also be a defected valve gasket or thermostat, but those should be recognized
by the engine overheating.
11-06-2008, 01:53 PM
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My Ride: 2005 BMW 545i, Titanium Silver. Bridgestone 760s on Weds Bavaria II 18" wheels, standard sport pack size. Sport, AT. Latest job - NGK Iridium IX plugs installed.
03-02-2009, 08:46 AM
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Originally Posted by elifly2' post='713373' date='Nov 5 2008, 08:24 PM
I am losing coolant in mt 05 545i-I have checked resv and hoses. Yesterday a big puddle under the car/about 1 pint or more. No clue what area it is coming from. I topped it off this am and ran it with heat on and no leaks. Possible overflow hose-the eng compt is clean. Thanks for any ideas.
Incidentally I too had the notorious coolant leak a few months back . It turned out to be the
rubber seal on the Temperature sensor hooked on the lower radiator hose. It was fixed by a $2 faucet washer pack from Home Depot. But I did end up changing the Lower hose with the OEM from the Stealershisp.
It is really hard to see the leak happening from the Temp sensor , so I ended up changing the Hose first to realize that the leak was really from the washer around the Temp sensor.
Hope this helps.
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