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      10-30-2019, 06:29 PM   #1
chrisveal
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Coolant Leak B58

So my 340i randomly dropped about 2 litres of radiator fluid yesterday at lunch (drove to lunch, about an hour for lunch, walked back to car and it was over the ground). I couldn't see where it came from, it also "sounded" like the water in the reservoir was boiling which seems odd/wrong as the temp never even got to 110C. I had no low level coolant warning or over temp either.
So I filled the system with fluid, bleed it and took it for a drive 30-40 min, got home, parked it up. I check post 30 min, no leak. Got up in the morning and it had dropped about a litre over night. It also is dropping in both reservoirs, I thought they were independent of each other?
Can anyone give some advice please?
Cheers

Chris
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      10-30-2019, 06:38 PM   #2
BMWILUVU
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Quote:
Originally Posted by chrisveal View Post
So my 340i randomly dropped about 2 litres of radiator fluid yesterday at lunch (drove to lunch, about an hour for lunch, walked back to car and it was over the ground). I couldn't see where it came from, it also "sounded" like the water in the reservoir was boiling which seems odd/wrong as the temp never even got to 110C. I had no low level coolant warning or over temp either.
So I filled the system with fluid, bleed it and took it for a drive 30-40 min, got home, parked it up. I check post 30 min, no leak. Got up in the morning and it had dropped about a litre over night. It also is dropping in both reservoirs, I thought they were independent of each other?
Can anyone give some advice please?
Cheers

Chris
Pressure test the coolant system. Most of our leaks are (in order of most to least frequent):
radiator cap leak
reservoir leak
turbo leak
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      11-01-2019, 08:10 PM   #3
chrisveal
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I have dropped my car off at Brisbane BMW, it turns out that the water pump has a leak and requires replacement.
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      11-05-2019, 04:00 AM   #4
chrisveal
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Quote:
Originally Posted by chrisveal View Post
I have dropped my car off at Brisbane BMW, it turns out that the water pump has a leak and requires replacement.
Picked up my 340i today and can not fault the guys at BMW Brisbane. They covered the pump plus extras under warranty and my cars back home running sweet.
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      11-05-2019, 12:27 PM   #5
cfm56d7b
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Quote:
Originally Posted by chrisveal View Post
Quote:
Originally Posted by chrisveal View Post
I have dropped my car off at Brisbane BMW, it turns out that the water pump has a leak and requires replacement.
Picked up my 340i today and can not fault the guys at BMW Brisbane. They covered the pump plus extras under warranty and my cars back home running sweet.
Glad it all worked out on the first service visit.
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      11-06-2019, 12:24 AM   #6
misguided_will
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how many kms has your car done?
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F30 BMW 340i M Sport
(installed: Injen EVO intake
to come: M Perf spoiler front and rear, M Perf rear diffuser, M Perf side blades)
SOLD - F32 BMW 435i M Sport
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      11-07-2019, 04:05 AM   #7
chrisveal
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how many kms has your car done?
Hey mate, my car had done 67k
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