Automotive Manual PDF

Installing spark plugs
Torque is one of the most critical aspects of spark plug installation. Torque directly affects the spark plugs’ ability to transfer heat out of the combustion chamber. A spark plug that is under-torqued will not be fully seated on the cylinder head, hence heat transfer will be slowed. This will tend to elevate combustion chamber temperatures to unsafe levels, and pre-ignition and detonation will usually follow. Serious engine damage is not far behind.
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2007 Suzuki Forenza and Forenza Wagon
ENGINE
Type: 2.0-liter, in-line four-cylinder, 16-valve DOHC
Materials: Cast iron cylinder block/aluminum cylinder head
Displacement: 2.0 liters (2,000 cc/122 cu. in.)
Bore x stroke: 86.0 mm x 86.0 mm/3.39 in. x 3.39 in.
Compression ratio: 9.6:1
Horsepower: 127 hp @ 5,600 RPM
Torque: 131 lb.-ft. @ 4,200 RPM
Valves per cylinder: Four
Fuel system: Electronic multi-port fuel injection, variable induction system, in-tank fuel pump
Emission compliance: ULEV II
Exhaust: Single
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