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The valve mechanism is equipped with 4-Valves per cylinder, DOHC, and implemented Toyota's Dual VVT-i and VVT-iW. It also uses multi-point or direct fuel injection . The 1NR, 2NR, 3NR, 4NR, 5NR, 6NR, and 7NR engines have Dual VVT-i standard and the 8NR engine has VVT-iW , enabling it to operate in the Otto cycle as well as a modified- Atkinson ...
A rocker cover, (UK), or valve cover (elsewhere) is a cover that encloses the rocker arm in an internal combustion engine, bolting with a gasket seal to the engine head. Engines with more than one head (such as a V8 ) will have multiple rocker covers.
A cylinder head of a four valve Nissan VQ engine engine. A multi-valve or multivalve engine is one where each cylinder has more than two valves (an intake, and an exhaust).A multi-valve engine has better breathing, and with more smaller valves (having less mass in motion) may be able to operate at higher revolutions per minute (RPM) than a two-valve engine, delivering more power.
Cylinder angle 90° Cylinder block alloy Cast aluminium, closed deck; Cylinder head alloy Cast aluminium, zirconium alloy; Valves per cylinder 4 ; Variable valve timing Camshaft adjustment on both the inlet and outlet side; Displacement 3,982 cc (4.0 L; 243.0 cu in) Bore x stroke 83 mm × 92 mm (3.27 in × 3.62 in) Cylinder spacing 90 mm (3.54 in)
Note: Cylinder head and camcase must be replaced together (line bored). the sparkplug pipe is pressed into the cylinder head and is not serviceable. If it becomes damaged the cylinder head must be replaced. The seals installed onto the ends of the sparkplug pipes seal against the valve covers and should be replaced when the valve cover is removed.
The most common vehicle uses of master cylinders are in brake and clutch systems.. In brake systems, the operated devices are cylinders inside brake calipers and/or drum brakes; these cylinders may be called wheel cylinders or slave cylinders, and they push the brake pads towards a surface that rotates with the wheel (this surface is typically either a drum or a disc, a.k.a. a rotor) until the ...
an inlet or exhaust valve in a piston engine or compressor; a direct coupled valve to control the flow of gas into or out of a gas storage cylinder. a scuba cylinder valve to control the flow of gas into or out of the diving cylinders of a scuba set; a valve to control flow of the actuating fluid into or out of a hydraulic or pneumatic cylinder
The cylinder head cover is made from a light weight plastic-resin material. The exhaust manifold is integrated to the cylinder head together with the catalytic converter and oxygen sensor to save even more weight as well as helping the engine to warm up quicker, reducing total exhaust emissions. There was an overall saving of 10 kg (22 lb).
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