This is starting to really try my patience! Ended up drilling the bolt out, which was messy (11 bits later), then helicoiling from 7-8mm and put in a new bolt. All goes back together and no leaks!
Started the car, and left to warm up, new thermostat seems to be doing it's thing and the temp gauge starts to move a little quicker than before. Just need to wait for it to fully warm to make sure fans kick in and off as normal. Then at approx 60 degrees on my temp gauge a red warning light comes on (which I didn't have with the old thermostat
). Knowing that the car is still actualy cold I take the car for a quick spin to see if things normalise.
Come back, temp gauge around the 90 mark, fans kicking in and turning off as normal. Red warning light still on!!!
So, do I have a new problem or the legacy of the original problem?
1. Do I need to bleed the cooling system?
2. Where is the temp sender? does it need to be reset/replaced if faulty?
3. Is it possible that the replacement thermostat is faulty?
I left the car over night to cool and tried it again this morning, red light came on again at 60 degrees, no leaks to report!
One thing I have noticed from the cabin though, is that there seems to be a gentle gurgling coming from beyond the passenger footwell area, which wasn't there before, this is only audible while stationary and under gentle revving.