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 engine coolant jacket gives good warm up times.
The cylinder block is a cross flow design with:
- The engine coolant inlet to the cylinder head on the exhaust side.
- And the engine 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. The first aperture located at the front of the cylinder block the second is at the rear of the cylinder block between the cylinder block and the rear cover.
A cast aluminum alloy, structural windage tray is bolted to the bottom of the cylinder block in purpose:
- To improve the cylinder block stiffness.
- To minimize Noise, Vibration and Harshness (NVH).
- To 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 to the cylinder block with bolts and sealed to the cylinder block with an injection molded gasket with RTV sealant at T joints. The rear cover is sealed with RTV sealant. Both cover contains a machined place for the oil seal. The front and rear covers have a removable element that allows the replacement of the oil seal without the removal of the cover.