Cylinder Block Assembly: Description and Operation

The four cylinder cast iron blocks have cast-in recesses in the bottom of each cylinder bore to provide connecting rod clearance; especially for 2.5L engines. The bores are also siamese to mimmize engine length. A partial open deck is used for cooling and weight reduction with oil filter, water pump, and distributor mounting bosses molded into the front (radiator side) of the block. Nominal wall thickness is 4.5 mm (0.177 in.). Five main bearing bulkheads and a block skirt extending 3 mm (0.115 in.) below the crankshaft center line add to the blocks high rigidity with light weight.