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I carried out a coolant change recently and changed the standard 1Bar GTi6 radiator cap to a 1.3Bar item from Halfrauds. I was hoping it would make a difference but it really hasn't. The following pic is the vehicle up to operating temp and occurs when I'm driving steady at say 30mph and above. It pretty much stays at this point: When I park up it'll creep slowly up to the mark below, this is exactly the point upon which the second fan activates: When the second fan is blowing the temp needle drops extremely slowly, in fact it'll drop back a smudge to the second last white marker and stop blowing, only to start up again shortly after as the needle once again reaches the above point. Is this typical? I'm not losing coolant and the car drives fine. I'm aware the gauge overreads but it's butt clenchingly worrying to see a temp gauge read so high and stay in that zone until I get properly moving again. Not a very good pic (was checking battery clamps) but shows a bit of the plumbing, there's a T-Piece below the expansion tank. I'll try and dig out a better pic of the pipework if it helps. : If there's something not right I'd love to know.