Ok, so I've cured my braking vibration, but now have another problem.
Just fitted a new coolant expansion tank, the old one was nine years old and looking very yellow as it's been attacked by UV light.
Chosen not to buy a carbon fibre or aluminium light shield as a new tank is only £25 off ebay.
Maybe my ebay purchase is the problem?
All re-fitted, but driving normally the water level warning light turns on and off, but when driven hard on track the warning light turns off as normal!!! Maybe I should just drive quick all the time?
There's plenty of water in the tank.
Should I buy a genuin Vauxhall part or could it be the sender/pickup thats faulty after refitting it???
Help appreciated.