I noticed the water temp of my 348TS was only a bit over 60°C on my latest drive I searched the forum and found Vernet (Calorific) TH7020.82 was a good replacement and available for €25 delivered Not working today so I decided to do the job As suggested by Ernie I removed the roof and engine cover and did the job standing behind the back seats Took me a good 2 hours, the bolts are not so accessable I put both thermostats in boiling water and let it cool down measuring the water temp The Vernet one was fully closed at 80°C The OEM was still a bit open at 60°C, so consistent with the temp maesured in the car Vernet also has a bigger opening dia and stroke Only had to make a 3mm hole
Some pictures: OEM thermostat is on the left Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
Temp under normal driving conditions is now close to 90°C The DIY can be found under '348 thermostat removal' by ernie posted in 2012
The housing has a bigger dia where the thermostat sits The rubber ring (NOT an O-ring) must fit in there. If not you will damage it when you fasten the top part (the one on the left of the 2 thermostat in my foto) Don't ask me how I know...
