Cylinder Block - Subaru impreza 2002 Service Manual

Hide thumbs Also See for impreza 2002:

Table of Contents

Mechanical

7. Cylinder Block

With all the engines except that for the STi model, the cylinder block is made of aluminum die

casting. Its open-deck design provides it with such advantageous features as relatively small

weight, high rigidity and excellent cooling efficiency.

With the engine for the STi model that generates increased torque outputs, the cylinder block

uses a semi-closed deck design which can hold the cylinder liners with higher rigidity.

The cylinder liners are made of cast iron. They are dry type which means their outer surfaces

are entirely in contact with the cylinder block.

The cylinder block supports the crankshaft at its five journals. The journal supporting portions

are designed such that sufficient stiffness and quiet operation are ensured.

The oil pump is located in the front center of the cylinder block and the engine coolant pump

is located at the front of the left-cylinder bank. At the rear of the right-cylinder bank is an oil separa-

tor which removes oil mist contained in blow-by gas.

CYLINDER BLOCK

ME-4

Table of Contents

Table of Contents