I found this old thread and I liked the sound of replacing the thermostat insert rather than the whole housing. I have removed and tested and verified that the thermostat insert doesn't work properly any more.
However, I'm now completely stumped about where to actually source a replacement? None of the usual web based parts distributors recognise the Mera TV-170 when I search for it. Has anyone successfully sourced a replacement insert for their Fiat 1.6 engine? Where did you buy it from?
Thanks,
Joe