Ok, after a quick thread on Briskoda regarding Thermostats and CTS's along with info from owners on here, i decided to first try replacing the thermostat to see if that cured my temperature problem (running at 75-80 instead of 90).
Getting to the thermostat wasn't too bad, i removed the upper and lower engine covers and loosened/moved the plate holding the N249 etc out of the way. Once that was done i removed the hose from the thermostat housing. This is where it got tricky. I got the top 10mm bolt out no problem at all, the bottom one proved to be a little more difficult. After much fiddling and swearing i managed to get the lower bolt loose (and then drop it - doh!). Once that was done i replaced the thermostat and seal, put the housing back on and replaced everything in reverse order.
A quick top up with some fresh Anti-freeze and water and a good run and all is well again. Temp is holding at 90 exactly.
Certainly a job i would do again
Getting to the thermostat wasn't too bad, i removed the upper and lower engine covers and loosened/moved the plate holding the N249 etc out of the way. Once that was done i removed the hose from the thermostat housing. This is where it got tricky. I got the top 10mm bolt out no problem at all, the bottom one proved to be a little more difficult. After much fiddling and swearing i managed to get the lower bolt loose (and then drop it - doh!). Once that was done i replaced the thermostat and seal, put the housing back on and replaced everything in reverse order.
A quick top up with some fresh Anti-freeze and water and a good run and all is well again. Temp is holding at 90 exactly.
Certainly a job i would do again