Glossary “ping” Definition:
Mild knock noise from the engine. Secondary rapid burning of the A/F mixture in the combustion chamber causing a second flame front that collides with the first flame front producing a knock noise. Also known as detonation or spark knock.
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pinging
Glossary “pinging” Definition:
Light intensity spark knock.
pin boss
Glossary “pin boss” Definition:
Area surrounding the hole in the piston for the piston pin.
pin punch
Glossary “pin punch” Definition:
It has a straight shank for use after a starting punch. It will push a shaft out of a hole.
pin striping brushes
Glossary “pin striping brushes” Definition:
Brushes with very long soft horse hairs that are used to apply paint in a small controlled area.
pin striping tool
Glossary “pin striping tool” Definition:
A serrated roller to deposit a painted in stripe.
pilot operated evaporator pressure regulator (POEPR)
Glossary “pilot operated evaporator pressure regulator (POEPR)” Definition:
An evaporator pressure regulated valve that is regulated by an internal pilot-valve pressure.
PIN
Glossary “PIN” Definition:
1). Acronym for product identification number. 2). A threaded tapered metal part used to repair cracks in castings such as an engine block using a process called pinning. 3). Device used to retain parts in alignment.
pilot operated
Glossary “pilot operated” Definition:
A small valve used to energize or regulate a large valve.
pilot shaft
Glossary “pilot shaft” Definition:
Shaft that is used to align parts during assembly.
pilot operated absolute (POA)
Glossary “pilot operated absolute (POA)” Definition:
Term used for pilot-operated evaporator pressure regulator.
pilot bearing
Glossary “pilot bearing” Definition:
Bearing at the output end of the engine’s crankshaft that supports the transmissions input shaft.
pilot bushing
Glossary “pilot bushing” Definition:
A plain bearing fitted in the end of the crankshaft. The primary purpose is to support the input shaft of the transmission.
pilot hole
Glossary “pilot hole” Definition:
Small hole drilled into a part to serve as a guide for a larger sized drill bit.
pilot model
Glossary “pilot model” Definition:
The first vehicle of a new design to be constructed on the assembly line to test the assembly procedures and fixtures before full-scale production begins.
pig tale
Glossary “pig tale” Definition:
1). A wiring component such as a bulb socket that is provided with wires attached for connecting to the original vehicle wiring. 2). Wiring repair connection some times refereed to as a western union pig tale splice.
pigment
Glossary “pigment” Definition:
Small particles added to the paint to influence properties such as color, corrosion resistance, and mechanical strength.
pilot
Glossary “pilot” Definition:
Device that guides the operation of a machine or part.
pig iron
Glossary “pig iron” Definition:
Solidified blocks of iron poured from the blast furnance into channels dig in sand. Used to make steel and cast iron.
piezoelectric principle
Glossary “piezoelectric principle” Definition:
Principle by which certain crystals become electrically charged when pressure is applied to them.