1999 e46 318 losing water - BMW Forum - BimmerWerkz.com
3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

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#1 (permalink) Old 10-19-2009, 05:58 AM
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1999 e46 318 losing water

Hi, my car seems to losing water. I will fill it up and within a day the coolant light will come back on. I think the water might be coming out of the exhaust but, not sure? Any advice would be much appreciated
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#2 (permalink) Old 10-19-2009, 03:57 PM
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Do you see it leaking? Do you see any water mixing with the oil? Is the car running ok?

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#3 (permalink) Old 10-19-2009, 05:56 PM
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you might want to check the thermostat that is in the lower part of the radiator. i had a worn out gasket and i could see it leaking drops of coolant.
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#4 (permalink) Old 10-19-2009, 09:30 PM
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Check your coolant expansion tank for cracks.
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#5 (permalink) Old 10-21-2009, 04:50 AM
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Thanks for the advice. There is no water oil mixture at all
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#6 (permalink) Old 10-27-2009, 07:32 AM
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Had the same problem. Took it for a pressure test at garage. It could be losing water from many places. In mine it was were the attachment for where the heater joins the radiator, plastic had just worn away.
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#7 (permalink) Old 10-27-2009, 09:35 AM
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Ok, do you see anything in your exhaust? Any white smoke for example?

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#8 (permalink) Old 11-05-2009, 07:31 AM
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Hi, I got a new thermostat and water expanision tank but, today my car was parked on a hill and I could see water running down. It looks like it was coming from the bottom back of the engine. The water level for the radiator seemed fine but, there was quite a bit of water. Any suggestions?
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#9 (permalink) Old 11-05-2009, 09:28 AM
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Turn off the air conditioner.
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#10 (permalink) Old 11-05-2009, 09:46 AM
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Quote:
Originally Posted by CanyonCreekMT View Post
Turn off the air conditioner.
That's what I thought but, the water had green coolant mixture in it
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#11 (permalink) Old 11-05-2009, 09:56 PM
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is there not a drain plug in the bottom of the block for coolant flushes? check to see if it is loose or cracked

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#12 (permalink) Old 11-05-2009, 10:00 PM
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Heater core leaking can cause the same symptoms as an air conditioner condensate drip but will have antifreez instead of just water.
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#13 (permalink) Old 11-06-2009, 08:46 AM
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I am thinking it is a heater core hose that is leaking. You should get under the car and see where the leak is coming from.

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#14 (permalink) Old 11-06-2009, 10:43 AM
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Well last night I had to top it up before I went to Edinburgh(40 miles away) I had the heating on for the front windscreen most of the way and when I was about 2 miles away the coolant light came on. I just drove the last 2 miles and then let it cool down, It has never overheated at any point. When It had cooled down enough I had to put about 1-1.5 litres of water in it. So I used it again last night for maybe about 5 miles and then this morning for about 5 miles and I didn't check it or really use the heater or AC but, when I went to use it this afternoon the coolant light came on again and needed another 1-1.5 litres of water
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#15 (permalink) Old 11-06-2009, 12:41 PM
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If you can smell antifreez when you rub your heater blower it is probably a heater core and if not I agree with the other guy on this site that it is probably a hose or hose conection. If it is a hose it continued use will make it blow and leave you stranded on the road.
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