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

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The leak has definitely been repaired and despite the coolant bubbling after every trip to/from work, it doesn't look to have decreased in volume in the reservoir. You might expect to lose coolant in the other direction, but this isn't guaranteed, since combustion pressures are far higher than pressures in the cooling system so could force gases through, say a fine crack opening when the engine is hot, while coolant might not go in the other direction. The tank has some fine cracks around the base of the cap but seems to hold presure and I am not loosing coolant so I am not sure if it needs replacing. It will however, also slow your engines warmup times, and if you’ve got any starting difficulties now, perhaps from a bit of coolant getting into the cylinders, they’ll probably get worse.

When I turn it anti clockwise, I can feel it releasing pressure from the thread but then as I keep turning it in the same direction it starts tightening again.I see it is an old post but just to share an experience; easiest, cheapest and most straight forward solution is to replace the whole tank. In my limited experience, it worked on a Triumph 1300, an1800 Marina, a Mk1 Lada, a Renault 5 Campus, and a Nissan Sunny (or I've just been lucky). Beyond that all I can think of, assuming you’ve checked that your radiator fan is working, that the radiator itself is clear, and you have carefully straightened any bent cooling fins, would be fitting a second fan, which might be difficult or impossible. Now, I've taken this with a pinch of salt as he seemed sketchy during our first interactions (but that's a different story altogether) but I don't really want to ask another mechanic just to have to pay out for labor again when he/she decides to haul everything out to take a look at the water pump/thermostat that the original guy had supposedly replaced.

IF exhaust gasses are appearing in the cooling system, your head, block or your head gasket are fairly definitively compromised, so IF your mechanic says he has done that test (its a chemical test kit) and you believe him, that seems to be that, unless that kit does false positives, which AFAIK it doesn't. Agree with the screw into it, if you used a really sharp self tapper, you might get away without drilling a pilot hole and dropping bits of metal into the tank. Its testing for radiator pressurisation, with a FSD of 5 psi, so it'd be more sensitive to damage than a compression test, but perhaps still not sensitive enough.Visit yourlocal dealershipfor replacement Motorcraft coolant and if at all unsure about adding the coolant yourself, a professional will be happy to help. Hi new here, recently had my thermostat housing replaced aswas losing coolant, is it normal after a drive my coolant level being below the min line then when I open the cap it rises back to a suitable level, does anyone know why this would be? I've had 2 or 3 serious overheating incidents due to failed repairs on the fan control circuit, so I'm expecting a head gasket failure. One of my previous cars began to show traces of oil in the coolant reservoir, but my (very experienced) indy told me his test for HGF was negative. If a garage is lulled into a sense of CHG security it might well embark on a futile exploration of other causes of coolant misbehaviour, needlessly replacing water pump, thermostat, etc.

I don't much like doing it, but I think its less risky than your suggested laissez faire air alternative. Your car’s heating and cooling systems are important factors in having a comfortable ride all year round, but especially in extremely hot or cold conditions. I've found it impossible to clear airlocks on my car by just running the engine with a funnel in the radiator (for expansion.Not entirely sure why this is, but in all honesty I know next to nothing about the internal workings of cars, hence why I went to a mechanic in the first place! As others suggested, I added some silicone grease on the two orings to prevent it from getting stuck. was the head skimmed before refitting -this is making the underside of the head (where it presses on the gasket) dead flat.

This seems to be the "professional" fix to tricky fills (see video links above) so the OP could get them to do it. sadly it is not that rare for head gaskets to fail again, you sometimes see cars advertised where it says head gasket just done suggesting that is a positive, to me it's a negative. Clarkson cut holes in his classic Range Rover bonnet on the Bolivia Special to ameliorate an overheating problem, but that would affect resale. 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. So I've recently had a coolant leak repaired on my 2008 model Ford fiesta where the mechanic noted that the water pump and thermostat needed replacing.If you need to repair your car’s air conditioning, we have all the parts you could want, including accumulators, actuators and compressors.