Coolant and Heating System overhaul 3

Introduction

Firstly, although you could in theory just change the thermostat if its playing up, its better to do both if the condition of them is unknown. Likewise, if the pump bearings have gone requiring a pump swap, you should change the thermostat too. In general, this job can only be seen as an overhaul as there is so much work involved, it makes little sense not to fit new. The 1.9 differs from the 2.1 which has a different thermostat housing.