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General E46 Forum
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Old 10-17-2011, 09:45 AM   #1
nico de Jager
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Join Date: Oct 2011
Posts: 1
My Ride: 2000 318 BMW E46
Water loss

Hi there.
Who can help me. I have a 2000 318 BMW. I replaced the waterpump about a month ago and i find that i have to top up about a litre of fluid ever week and a half., Today i replaced the radiator cap to see if it may help.
What else could be my problem?
Thanx Nico
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Old 10-17-2011, 09:59 AM   #2
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Location: North Carolina
Posts: 157
My Ride: 2003 330i
the o-ring on the water pump sounds like it might be messed up or just not their...do you remember it?
I call my car a she because I keep putting money into her, and she just keeps Bi*chen...but I love her
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Old 10-17-2011, 10:30 AM   #3
Blocked Out
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Do you see any signs of leaks, or a visible leak somewhere?

Check your expansion tank and thermostat for leaks.
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Old 10-17-2011, 11:26 AM   #4
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Did this start to happen after your water pump replacement? If it did, then it could be the water pump or you may have disturbed the thermostat or other cooling system part. What was wrong with your water pump? Did you check your plastic water pipes in addition to the radiator hoses? How many miles on your car?
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