[Harmonyangel]

Peugeot 307cc temperature problem

I have discovered that the 307cc has a thermostat of 105C rather than the other variants which have 89C. The thermostat also has a sensor in the plastic enclosure which I don't think the others have. Because of this the engine runs hotter and hence the gauge also shows a temperature variation of 105C descending down to just under 90C. Also the oil temperature also shows one division above the 100c mark which is also expected. I cannot find a replacement thermostat (which is built into the housing) which has a temperature less than 105C which I believe means that the cc type has been set to operate at 105C. The only thermostats that have 89C do not have a housing with a built in sensor, hence it is not possible to change to a lower temperature unless the sensor is not connected. I am personally happy to have the lower temperature but there is no easy way to do it. Perhaps the designers thought that as the cc is a sporty version with open roof capability that they would raise the engine temperature to make it a bit more responsive (if indeed is what happens but I don't know). This explains why 307 cars run less hot as they have the lower temperature thermostat.
I also has a circumstance where the reservoir tank showed a high level after running the car but I believe this is air expanding in the system. There are at least one bleed screw (in the heater pipe) and possibly another elsewhere on the block. Mine has settled down to a consistant level only raising a small amount when hot and then returning when cooled down. This is ok as water expands when hot although much less than air.
I hope this helps.