Glossary “runout” Definition:
Amount that a part wobbles up or down, or side to side when rotated.
r
runs and sags
Glossary “runs and sags” Definition:
Paint defect caused by excessive paint flowing unevenly down a surface, causing ridges and lines to form.
running gear
Glossary “running gear” Definition:
The undercarriage of a vehicle and all mechanical components attached to it.
running on
Glossary “running on” Definition:
Condition that exists when a spark-ignition engine continues to run after the ignition switch has been turned off.
run glider
Glossary “run glider” Definition:
U-shaped track that guides the travel of movable glass and seals against air and water leaks.
runners
Glossary “runners” Definition:
Passages in a intake or exhaust manifold. The passages or branches of an intake manifold that connect the manifold’s plenum chamber to the engine’s inlet ports.
running board
Glossary “running board” Definition:
A flat step between the front and rear fenders to help passengers get in and out of the vehicle.
rubbing block
Glossary “rubbing block” Definition:
Insulated section of the movable breaker-point arm that contacts the breaker cam of a conventional ignition distributor.
rules of motion
Glossary “rules of motion” Definition:
Term used for Newton’s laws of motion.
rumble
Glossary “rumble” Definition:
Low pitch noise often loudest during turns. Can usually be identified as front or rear in origin.
rubberized undercoat
Glossary “rubberized undercoat” Definition:
Synthetic-based rubber material applied as a corrosion or rust preventation layer.
rubber mallet
Glossary “rubber mallet” Definition:
A solid rubber head that is fairly heavy. It is often used to gently bump sheet metal without damaging the painted surface.
Rubber Manufacturers Association (RMA)
Glossary “Rubber Manufacturers Association (RMA)” Definition:
A trade association for the manufacturers of rubber products for motor vehicles.
rubberized cork
Glossary “rubberized cork” Definition:
Mixture of cork and rubber sometimes used as a gasket.
rub through
Glossary “rub through” Definition:
The inadvertant removal of a colorcoat primarly at the panel edges on high misalign panels during compounding and/or polishing operations because the abrasive of the polishing agent cuts away the colorcoat.
rubber body insulators
Glossary “rubber body insulators” Definition:
Used between the body and the frame to reduce noise and vibrations.
rubber bumper
Glossary “rubber bumper” Definition:
1). Rubber stop on the car frame that prevents metal-to-metal contact when the rear-axle housing moves to its maximum upward position. 2). Rubber stops positioned on or near a control arm to limit the maximum upward or downward travel of the arm.
rubber coupling
Glossary “rubber coupling” Definition:
Rubber-based disc used as a U-joint between the driving and the driven shafts.
RSM
Glossary “RSM” Definition:
Rain Sensor Module
RTN
Glossary “RTN” Definition:
Return. A dedicated sensor ground circuit.