Engine Coolant System Components, Overview

1 - Radiator
2 - Oil cooler
3 - Coolant pump, coolant thermostat
4 - Cylinder block
5 - Expansion tank
^ Checking filler cap; Testing pressure relief valve filler cap.
6 - Turbocharger
7 - Intake manifold
8 - Heating system heat exchanger
9 - Gearbox oil cooler
^ For ATF in automatic gearbox