water leak - Ford B-Max Forum
 
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post #1 of 7 (permalink) Old 5th August 2020, 09:19 Thread Starter
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water leak

had a small leak which i or garage could not find..losing prob half litre a month..after doing reasearch i bit the bullet and bought some k seal..touch wood so far nice dry driveway after 3 months

i used to be indecisive..now im not too sure
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post #2 of 7 (permalink) Old 5th August 2020, 10:10
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Nice to know that the leak has stopped for now.
Only issue i can see with using a sealer in the water system is that it will clog the water ways in the radiator eventually this then leads to overheating and possible engine damage if it is not sorted.
I would look REALLY hard for any rusty looking deposits on the chasis,if you find any then you are near to finding the leak, also check the carpets in the car near to the heater matrix to see if it's damp, if so then the heater box is the culprit.

1 litre Zetec Turbo petrol 74Kw / 100 Ps. as in my avatar.
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post #3 of 7 (permalink) Old 5th August 2020, 14:42
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Do you have the 1.0 ecoboost engine ?

John

Titanium X Tectonic Silver 1.0 125ps Eco.
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post #4 of 7 (permalink) Old 6th August 2020, 10:14
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If coolant is being consumed and neither you or the garage can find where it is coming from, that suggests no puddle on the floor or rusty water marks under the bonnet. That leads me to the conclusion that the most likely source is a leaking cylinder head gasket.

B Max Titanium X 1.0 125 bhp in Magnetic with built in SatNav and rear sensors.
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post #5 of 7 (permalink) Old 6th August 2020, 16:07
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There would still be "rusty" looking water marks on the engine block with a leaking head gasket though.

1 litre Zetec Turbo petrol 74Kw / 100 Ps. as in my avatar.
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post #6 of 7 (permalink) Old 6th August 2020, 17:41
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Not always in my experience Wiggy. The coolant evaporates when it comes out of the cylinder head.

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post #7 of 7 (permalink) Old 7th August 2020, 07:40
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Hi,


Best case, poor seal on the header tank screw cap.

The worst case is a leak into the cylinder(s), but that ought to show as excess steam in the exhaust. Only confirmation would be a compression test.

Whatever the final diagnosis, best of luck with it.


Geri

B-Max Zetec 1.4 Petrol
Mid 2015 build
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