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The cylinder head was also redesigned to keep the compression ratio at 8.8:1 even with the flat top pistons and now featured provisions for an air injection reaction system. This engine was used from 1995 to 2002. [2] Some 1992 through 1998 L24 cylinder heads developed cracks in the fifth camshaft journal, located closest to #4 cylinder.
The Mitsubishi Saturn or 4G3 engine is series of overhead camshaft (OHC) straight-four internal combustion engines introduced by Mitsubishi Motors and saw first service in the 1969 Colt Galant. Displacement ranges from 1.2 to 1.8 L (1,239 to 1,755 cc), although there was also a rare 2-litre (1,994 cc) inline-six version built from 1970 until 1976.
Saturn owner's manuals from this period made mention to the SL3- it would have featured an SC front end on an SL2 body, with all options as standard. [8] An inline-six engine derived from the 1.9L was to be offered. The I6 was to be an in-house 2.5L with 5 valves per cylinder, set to make somewhere around 250 horsepower (186kW; 254 PS). [9]
However, since the 1980s, this has changed. Two engine families were introduced using the letter "A" to denote that all the engines in the family had an alloy cylinder head. Their latest engines, however, do not follow any previous conventions (e.g. 4M4, 3B2, etc.). The third (digit) previously denoted the engine family.
The 2.2-liter Ecotec engine in the 2007 Saturn Ion was improved over the previous year's model: power output increased from 140 hp (104 kW) to 145 hp (108 kW) at 5600 rpm, and torque output increased from 145 lb⋅ft (197 N⋅m) to 150 lb⋅ft (203 N⋅m) at 4200 rpm. The new engine was fitted with the ECU from the 2.4-liter engine.
Diagram of a DOHC straight-four engine 1989-2006 Ford I4 DOHC engine with the cylinder head removed 2006-2009 Nissan M9R diesel engine. A straight-four engine (also referred to as an inline-four engine) is a four-cylinder piston engine where cylinders are arranged in a line along a common crankshaft.
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All engines developed within this family have aluminium cylinder block and head, 4 valves per cylinder, double overhead camshaft layouts, and MIVEC continuous variable valve timing. All variations of 4B1 engine share the same engine block with a 96 mm bore pitch. The difference in displacement is achieved by variance in bore and stroke. [4]