Cylinder Block
The deep skirt cast aluminum cylinder block is an in line configuration. Thin wall, interference fit cast iron liners provide optimum weight, cylinder bore roundness and robustness. The low volume coolant jacket gives good warm up times. The cylinder block is a cross flow design with the coolant inlet to the cylinder head on the exhaust side and the coolant outlet from the cylinder head on the air inlet side.
Oil from the cylinder head drains back to the oil pan through open apertures. One is located at the front of the cylinder block and one is at the rear of the cylinder block between the timing chain and the lower timing chain cover.
A cast aluminum alloy, structural windage tray is bolted to the bottom of the cylinder block to further improve the cylinder block stiffness, minimize Noise, Vibration and Harshness (NVH) and help reduce oil foaming.
Various machining ports in the cylinder block are sealed with cup plugs and threaded plugs. Removal of these is not necessary for service procedures.
In cold climate markets a cylinder block heater is fitted to the cylinder block. The heater is screwed into a threaded bore on the cylinder block, which is normally sealed with a threaded plug. The heater comprises a heating element, powered by mains electricity. The element warms the engine coolant in the water jacket surrounding the cylinders in the cylinder block to prevent the cylinder block from freezing.
There are covers to the front of engine and rear of engine. Both covers retain a seal element for the crankshaft oil seal. The engine front cover is fixed to the engine block and the oil pan by bolts and sealed to the cylinder block/oil pan T joint with a bead of the room temperature vulcanization sealant. The engine front cover has a removable element that allows the front oil seal to be replaced without removal of the front cover.
The rear of engine is sealed by the engine rear cover housing with the room temperature vulcanization sealant and bolt fixings to the cylinder block and oil pan. The crankshaft oil seal can be replaced without removal of the rear cover housing.
The rear cover housing holds the following:
- Rear crankshaft oil seal
- Crankshaft Position (CKP) sensor
- Starter motor
- Access cover for fuel pump mounting
- Plug for Timing Chain tool access.