U engine The U engine is a piston engine made up of two separate straight engines (complete with separate crankshafts) joined by gears or chains. It is similar to the H engine ...

Unit Injector Explained (UI) Unit Injector (UI) is an integrated direct fuel injection system for diesel engines, combining the injector nozzle and the injection pump in a single ...

How to Replace a Universal U Joint A universal joint (u-joint) is used to connect a vehicle's drive shaft to the differential on one side and the transmission on the other. Rear ...

How to Use a Voltmeter to check battery condition A digital voltmeter can check and test electrical components such as a control relay or an ignition coil to help pinpoint a ...

V24 engine A V24 engine is a V engine with 24 cylinders, suitable only for very large trucks or locomotives. Unlike smaller V16 and V20 engines, very few V24s were originally ...

V6 Car engine A V6 engine is a V engine with six cylinders mounted on the crankcase in two banks of three cylinders, usually set at either a right angle or an acute angle to each ...

Vacuum fluorescent display A vacuum fluorescent display (VFD) is a display device used commonly on consumer-electronics equipment . Invented in Japan in 1967, the displays became ...

Vacuum servo A vacuum servo is a component used on motor vehicles in their braking system, to provide assistance to the driver by decreasing the braking effort. In the USA it is ...

Engine Multi-valve History In automotive engineering a multi-valve or multivalve engine is one where each cylinder has more than two valves. A multi-valve engine has better ...

Wheel Valve stem types A valve stem is a self-contained valve which opens to admit gas to a chamber (such as air to inflate a tire), and is then automatically closed and kept ...

Vacuum delay valve A vacuum delay valve is a valve with a small orifice, which delays a vacuum signal. These are commonly used in automobiles to alter the behavior of vacuum ...

Engine Valve train A valve train or valvetrain is a device that controls the operation of the valves.,in which a sequence of components transmits motion throughout the assembly. ...

Engine Variable valve timing In internal combustion engines, Variable valve timing (VVT), also known as Variable valve actuation (VVA), is any mechanism or method that can alter ...

Vehicle tracking system A vehicle tracking system combines the installation of an electronic device in a vehicle, or fleet of vehicles, with purpose-designed computer software at ...

Viscous Fan clutch A fan clutch is a thermostatic device that exists as an integral component of certain automotive cooling systems. Function When the engine is cool or even at ...

Volvo B30 engine (1968 to 1975) The B30 is a Straight-six engine with overhead valves, produced by Volvo starting in 1968 and used primarily in their 164 sedan from 1969 through ...

Volvo B8444S engine Manufacturer Volvo Production 2005-2010 Displacement 4,414 cc (4.4 L;269.4 cu in) Cylinder bore 94.0 mm Piston stroke 79.5 mm Cylinder block alloy Aluminium ...