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Does the thermostat open up? they can get cooked when a head gasket goes, also check the cooling fan cuts in the fan thermostat in the rads are prone to failing on them.
Fixedwheelnut-
Dodgy mechanic no.1 said he had replaced thermostat and water pump... Although funnily enough not when he did the head he decided to get it back in a few weeks lager and charge me another £300. When I mentioned the overheating he claimed it is fine to replace the 85c(which I think this is) with a 87c or whatever and that could be why it was overheating. I had the thermostat out previously and it was fine. With him saying it had been replaced I didn't check again but on the back of the 'any thermostat would do the job' comment I'll get it out again
Jw89
Having issues with the cooling system on our MK2 Diesel and various mechanics are being a nightmare. It's been nearly a year now of not really having a car because of it and I just want it sorted. Had the head changed last year, but the mechanic who did it did a shoddy over priced job of various other bits and I no longer trust him. Soon after head was done car was overheating and pressure builds up in expansion tank until it's dropped down to empty. Every few days I have to release the pressure by opening expansion tank then it returns to level. One mechanic checked it and said sniffer test showed head gone again. Original mechanic had it back and said head all fine... As I said I don't trust him so trying to get 3rd mechanic to confirm either way except he's had it for over a week and hasn't even looked at it yet. Area seems full of shoddy mechanics. Basically I want to find out if anything else such as blocked rad or air in heater system could lead to over pressurising coolant system. Car no longer seems to be over heating, no scum in oil, don't think there's any bubbles in coolant and it isn't losing any. I'm at the stage I want to try and do it myself if I can then I know exactly what the problem is and can actually get back to using the car. It's a lovely old Golf, always wanted one, and my wife and kids are fed up of not having a car to use! Cheers!