nodrog

ChrisChaos, I can't believe how exactly you have described my problems with a pressurised TD5 cooling system. About 18 months ago I fitted a new head and a radiator so things should be in relatively good mechanical shape. Did you ever discover a solution to your problem - was it a head and/or head gasket problem? Here's what you said originally: "Even after being left overnight to fully cool, most of the pressure is still there. Not only that, but the pressure causes the coolant in the expansion tank to disappear until the cap is released, at which point the coolant appears to rise from the depths to nearly where it should be. While under the highest pressure a little coolant is forced from the radiator lower hose junction despite being tightly done up with a jubilee clip".