Cylinder Block
The deep skirt cast aluminum cylinder block is an inline 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 located at the front of the cylinder block and one 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.
There are a front cover and a rear cover on the engine.
The front cover is secured with bolt fixings to the block and oil pan and has an integral elastomeric seal with room temperature vulcanization sealant applied at block/oil pan T joint. The front cover has a removable element that allows the front oil seal to be replaced without removal of the front cover.
The rear cover housing is secured with bolt fixings to the block and oil pan and sealed with room temperature vulcanization sealant. The rear crankshaft oil seal is press fit into the rear cover housing and can be replaced without removal of the rear cover.