Radiator Expansion Water Tank Cap Compatible for Fiesta Focus C-Max Mondeo

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Nifty physical test for HG failure. I dunno if that would work with a lower tech pressure gauge (or even an improvised manometer) but it seems a possibility. Difficult bit would be getting a good seal. Sorted, thanks for the hints chaps. Put a screw through the side and got some mole grips on it, came out after a few twists to loosen the seal. Crap design. That's a very broken car though. Might not be sufficiently sensitive for a marginal integrity loss.

Hi Freddy42, I know you posted this over 3 years ago so I'm asking this more in hope that you will reply. I am having the same problem you had concerningThe material or media contained in these forums are submitted by the general public and is NOT endorsed by Ford or Ford Motor Company in any way. I try and be as cynical about garages as the next man, (though/so/because I have hardly ever used them apart from MOT's) BUT I think the innocent-until-serious-grounds-for-suspicion principle ought to be applied. I like the idea of a physical test because I might be able to lash one up, and I doubt I'd be able to get the chemical kit here. You can sometimes score extra cooling using the aircon fan (I ran my Sierra using the aircon fan only for a while) but I assume if you had one you would already be using it

Heater in a car acts the same as the radiator under the bonnet, which is why when the engine starts overheating its a help to use the heater in the car on max hot to help keep engine cooler If it were mine I would keep a close eye on the coolant. Your engine will only overheat if you loose a significant amount I'd assume that'd be the chemical test for CO2, because I'd assume its commoner, but "some tests" isn't a specific description.If the coolant level is low, add the correct coolant to the reservoir (not the radiator itself). You can use diluted coolant by itself or a 50/50 mixture of concentrated coolant and distilled water.