I think I'm paranoid now!
After much bad language, scratches and kicking things around the garage the pipe was back on, but temp was still higher than I would like - 80ish.
The car ran better but if I gave it the beans it sounded like the heater came on in the car! Weird!!
Went away Friday / Sat and left the merc on the driveway in shame!
Been out for a 30 mile spin. Would judder from time to time and at 20 miles the limp mode thing kicked in. Temp went I would say nearly to 90 and dropped to 60 when limping home.
Still sounding like the blowers kick in on the windscreen when I accelerate hard.
Off to the garage tomorrow. Any recommendations??