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If the cylinder walls are too smooth, this wear will not occur, with the rings "skating" over the polished surface. [1] In order to correct the situation, a mechanic can take the engine apart, and deglaze the cylinders, usually using an abrasive.
The construction is an aluminium cylinder head and a cast iron block. [ 7 ] [ 8 ] The bore is 93.4 mm (3.68 in) and the stroke is 84.0 mm (3.31 in), resulting in a displacement of 3,453 cc (210.7 cu in).
Engine displacement is calculated based on bore, stroke length and the number of cylinders: [1] displacement = π ( 1 / 2 × bore ) 2 × stroke × n cylinders. The stroke ratio, determined by dividing the bore by the stroke, traditionally indicated whether an engine was designed for power at high engine speeds or torque at lower engine ...
The induction stroke is the first phase in a four-stroke (e.g. Otto cycle or Diesel cycle) engine.It involves the downward movement of the piston, creating a partial vacuum that draws an air-fuel mixture (or air alone, in the case of a direct injection engine) into the combustion chamber.
To accelerate development of the combustion chamber shape, a test engine was created using an engine block from a 1980 model year 3.3 L (200 cu in) Thriftpower six that was cut, shortened, and brazed together again, resulting in a four-cylinder engine displacing 2.2 L (134 cu in). [4]
The air intake ports are through passages bored into the sides of the cylinder sleeves, rather than in the cylinder head. [3]: 4 Intake air is discharged from the blower into an air chamber in the cylinder block; when the intake ports are uncovered by the downward stroke of the piston, the air from the air chamber enters the combustion chamber.
Bore × stroke are 3.501 by 3.625 inches (88.9 mm × 92.1 mm), and compression is 8.0:1. Overheating was a serious concern for the engine, since the engine block was of an open-deck design, severe overheating could cause the cylinder barrels to warp and pull away from the head gasket, causing coolant leaks into the cylinders and cylinder scuffing.
The 225 used the RG (tall) block with a 3 + 2 ⁄ 5 in (86.4 mm) bore, a 4 + 1 ⁄ 8 in (104.8 mm) stroke and 6.699 in (170.2 mm) connecting rods, for an actual displacement of 224.7 cu in (3.7 L). This undersquare geometry was a departure from the emerging trend towards oversquare engines.