Botts

So i've had my Ford for a about a month Started driving home one night and when I got home I heard a hissing noise from under the bonnet when to check it and the engine coolant was bubbling waited till the morning and then enging coolant is above the Max marker could the enging coolant be overfilled and bubbling over how would I go about draining the resovoir and and re-filling or is it not as simple as that and will I have to take it to a garage?

Caddyshack

I doubt over filling would make it boil. To drain a bit of fluid you can either Google the thep of car and find the bleed nipple and see if anything comes out with the engine cool and running. If not then you would need to loosen off a lower pipe and let a little drain out but not much.

I would then be looking for the source of the problem. These things can be a bit frustrating to find. Can you post up the make and model number including the engine size and type as it could be common.
If in doubt seek a pro

matts1

as above, get the model, year etc up so we know what you have.

Maybe an air lock somewhere, you could run it stood with the cap off till it is up to temp and give the pipes a good squeeze (hot so careful) and see if you shift the air. Also the rubber gromit inside the caps can kink and perish so make sure it is flat and good condition.

martysmartie

iTrader: (1)

Could also be the pressure cap.

Martin

andy.v

could also use a large syringe or turkey baster, to take some water out.

Fast Guy

Was it running running hot at the time? IE was it overheating and the fan had come on?
Has the cooling system been touched recently?

If the cap's ok and it's been bled properly so no air locks you might be looking at something a bit more serious.
Make sure the water pump belt hasn't failed.
Thermostats can fail so they don't open, so might be worth checking.
The water pump may have failed (normally they have a tell tale leak below their location where you park)
Or possibly the head gasket failing and pressurising the cooling system.