took the car out for a run earlier, as usual it got up to 3 bars on the digidash, felt the rubber pipe running from the plastic pipe on the block to the bottom of the rad, and it was very hard, under a lot of pressure, and i could not squeeze it with my hand. i slowly undone the coolant reservoir cap, some fluid gushed down inside the reservoir and the pipe then felt normal (ie it could be squashed by hand). the fan still cuts in at 3 bars on d-dash,and it's never gone above 3 bars. is this normal, or does it point to a suspect thermostat or other problem????
after a run, if i undo the reservoir cap, the fluid level gushes down the reservoir (about half of the fluid in the reservoir)-again, does this sound normal?
engine has new water pump, head gasket etc and has a coscast head.