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Category: Glossary of Car Terms
What is OHV?
Over Head Valve (OHV). An overhead valve engine has its camshaft in the engine block. It uses lifters, pushrods and rocker arms to open and close the valves in the cylinder head.
What is Overdrive?
Overdrive is a transmission gear that allows the engine to turn at a reduced rpm for a given road speed.
What is OHC?
Over Head Cam (OHC). An overhead cam engine has its camshaft in the cylinder head, above the valves and cylinders. This allows the camshaft to directly open the valves without using pushrods.
What is Overheating?
Overheating occurs when an engine reaches too high of an operating temperature. Overheating may lead to potentially significant engine damage.
What is Oil Pump?
The oil pump takes oil from the oil pan and pressurizes it, allowing it to travel throughout the engine and lubricate the engine’s moving parts.
What is Parking Brake Cable?
The parking brake cable connects the parking brake pedal or handle to the parking brakes themselves.Top
What is Pinging Engine?
When your engine knocks or pings, it is a sign that the engine is firing at the wrong time. This could be because of bad ignition timing, an incorrect grade of gas, or another ignition or fuel system fault.
What is Power Steering Fluid?
A special type of fluid designed for power steering systems.
What is Park Gear?
This is a gear found only on automatic transmissions. The park gear locks a vehicle’s transmission in place, preventing the car from moving.
What is PCM?
Powertrain Control Module. The PCM is a powerful computer that manages the Engines Ignition, Fuel Injection, and Emission Systems. In some vehicles it may control the operation of the Transmission and Anti-Lock Brake Systems as well.
What is Pressure Plate?
The pressure plate is part of the clutch. It applies pressure evenly to the clutch disc friction area, thus allowing a smooth application of power.
What is Parking Brake Shoes-Pads?
The parking brake shoes/pads are just like normal brake pads or brake shoes. The only difference is that they work specifically with the parking brakes.
What is Park-Neutral Safety Switch?
This is a switch found on many modern automatic transmissions that prevents a vehicle from starting unless the gear selector is in park or neutral.
What is Photochemical Smog?
Photochemical smog, commonly referred to simply as smog, is a by-product of the combination of HC and NO X . In the presence of sunlight these two elements form ozone (O 3), nitrogen dioxide, and nitrogen nitrate; all of which cause respiratory problems. Nitrogen dioxide is a light brown colored gas which can affect visibility…
What is Power Steering Pump?
The power steering pump pumps power steering fluid to other power steering system components, allowing the driver to steer with minimal effort.
What is Play?
Play occurs when there is excessive free movement in your vehicle’s steering system. For instance, if you turn your steering wheel either direction from the center and nothing happens for the first two inches of travel, your steering system has play in it.Top
What is Power Steering?
Power steering is a steering system with a high-pressure pump that boosts the driver’s steering efforts, making it easier to steer with much less effort.
What is Piston?
The piston fits into the cylinders and is connected to the crankshaft. When a spark plug fires, it ignites the air/fuel mixture in the cylinder, pushing the piston down which then turns the crankshaft. This is how an engine makes its power.
What is Rotary Engine?
A rotary engine does not have pistons or cylinders; instead, it has triangular shaped rotors that move in an elliptical path within chambers to create power. The only companies that have offered rotary cars for sale are Mazda, NSU, and Citroen.