Camshaft Carrier
| ITEM | DESCRIPTION |
|---|---|
| 1 | Fuel rail |
| 2 | Fuel injector (4 off) |
| 3 | Oil filler and cap assembly |
| 4 | Engine breather |
| 5 | Engine vent module |
| 6 | Camshaft carrier |
| 7 | Exhaust camshaft and Variable Camshaft Timing (VCT) actuator |
| 8 | Inlet camshaft |
| 9 | Camshaft cap (9 off) |
| 10 | Bolts (20 off) |
The structural camshaft carrier is cast from aluminum alloy using a high pressure die cast process. The camshaft carrier is located on two dowels in the cylinder head and secured with bolts. A gasket seals the camshaft carrier to the cylinder head.
The primary function of the camshaft carrier is to house and secure the inlet and exhaust camshafts. The camshaft bore geometry is bored in a single machining operation to ensure optimum friction reduction and each camshaft cap is uniquely identified and must be matched to its related bore.
The camshaft carrier also provides locations for the Camshaft Position (CMP) sensor, the oil filler pipe and the engine vent module. The camshaft carrier has high pressure oil galleries feeding the Variable Camshaft Timing (VCT) actuator and provides thrust face lubrication. A low pressure oil gallery returns oil from the engine vent module back to the cylinder block and oil pan.
The camshaft carrier also provides the locations for the fuel rail, engine breather and the oil filler cap.