My grande 2007 1.2 water level always settles at 3cm from bottom of expansion bottle, I have topped it up several times and after about 2 weeks its back down below MIN
The car runs at normal temp and the water level settles at this below MIN permanently and goes no lower
Is this a common fault with this model and can any help
Thanks

It must be going somewhere. Either a slow leak (and it's evaporating before it drips to floor) or a headgasket failure.

Thanks for your reply
If it was a leak would the water level not continue to go down, the water settles at below MIN and never goes any lower
I was thinking of higher pressure when topped up to correct level and the Expansion filler bottle cap leaking

Thermostat housing possibly, mine was losing water for a long time. Gradually getting faster. To the point where it would literally fall out of the termostat housing as I was topping it up. Easy fix too.

Maybe the reason it doesn't go down any further is because the leak may be somewhere connected by a pipe on the reservoir, and once the water level drops below said pipe, no more can escape....?....

Thanks, will check out the housing and hoses at top end

The 1,6-16V engine in our Fiat Palio does exactly the same for about 9 years and 170.000km now. (~ 106.000mls)
Once in a while I top up, but don't worry about it anymore....!

Thanks

Had head gasket, thermostat, temp switch and water bottle replaced. after driving about 30 km I stopped and checked water reservoir / bottle. Found foam and bubbling in water reservoir / bottle, can see a little water has leaked out water reservoir / bottle cap. Any suggestions as to what the cause could be ?

Water level in water reservoir / bottle is on (min) mark. After arriving home I open bonnet and listen next to water reservoir / bottle cap, you will hear a hissing noise every now and then. After replacement of (head gasket, thermostat, temp switch and water bottle) the temp gauge is between 1/4 and 1/2 when driving or idling in traffic.

Have the cooling system pressurized at a decent workshop.
I'm afraid the headgasket is still leaking, causing the bubbles you are describing....!

I had this problem and it was the radiator drainage duct O ring leaking. Replaced that and hasnt leaked since
May be something else but just putting a possibility up

My old Renault Megane did the same.
I could top it up, and a day later, it was right at the bottom of the expansion bottle.
It would never drop below this point.
I never did get to the bottom of it, even after 10 years.

Mine has been like that for 2 years. Not something i'm going to worry about until that dreaded white sludge appears anywhere. Just below min.