Coolant Outlet
| ITEM | DESCRIPTION |
|---|---|
| 1 | Coolant outlet |
| 2 | Coolant outlet |
| 3 | Engine Coolant Temperature (ECT) sensor |
| 4 | O-ring seal |
| 5 | Coolant inlet from turbocharger |
| 6 | Spring clip |
| 7 | Coolant outlet to heater core |
| 8 | Engine by-pass hose connection |
| 9 | Radiator top hose connection |
The coolant outlet is located on the rear of the cylinder head, below the vacuum pump and the HP (high pressure) fuel pump. The outlet is secured to the cylinder head with 4 bolts and sealed with a gasket.
The coolant outlet has 4 outlet connections; one from the radiator top hose, one to the heater core, one from the turbocharger and one for the cooling system by-pass hose.
An engine coolant temperature (ECT) sensor is installed in the coolant outlet. The sensor is a push fit on the outlet and is sealed with an O-ring seal and secured with a spring clip.
On NAS (north american specification) market vehicles a second ECT sensor is located in a Y piece connector in the radiator bottom hose. The NAS vehicle uses both sensors to measure ECT. The additional ECT sensor provides thermostat monitoring for on-board diagnostic (OBD)'s.