If the car is overheating .. STOP DRIVING !
These engines do not tolerate running with low coolant
Headgasket failure could write the car off..a £1000 repair
Images of a 2018 1242cc 500
Blue cap on coolant sight tube : part of radiator
(Other engines have a round pot reservoir on the inner wing)
Photo of a new thermostat housing
The one fitted to the 500 is around 15cm - 6 inches below this ( awkward to photograph)
The smaller tube..facing to rear of car..
Is conventionally made of plastic and can fracture with age and use
Hence this All.metal replacement
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