Glossary “three mode cycle” Definition:
A quick test procedure to study the causes of high emissions performed on a dynamometer under load or in a service bay without a load.
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three on the tree
Glossary “three on the tree” Definition:
Three speed manual transmission having a column-mounted shifter.
thread pitch gauge
Glossary “thread pitch gauge” Definition:
Device that measures bolt thread pitch.
thread series
Glossary “thread series” Definition:
Standard designation of the number of threads and their pitch per unit, inch or millimeter.
threaded fastener
Glossary “threaded fastener” Definition:
Any of several types of components that hold parts together in assembly by interference of screw threads with mating threads in another component, such as capscrews, self-threading screws, stud-and-nut, and bolt-and-nut assemblies.
threaded insert
Glossary “threaded insert” Definition:
Threaded coil that is used to repair a damaged internal thread.
thread compound
Glossary “thread compound” Definition:
Thread compounds take up the space between the threads after tightening and harden to form a bond between the internal and external threads. The difference between the compounds relate to the temperature range it can withstand and the type of metal it works with.
thread pitch
Glossary “thread pitch” Definition:
The distance of the threads on a fastener. Also, the number of threads along a certain length.
thousandths
Glossary “thousandths” Definition:
One part of a thousand.
thread chaser
Glossary “thread chaser” Definition:
Device, similar to a die, that is used to clean threads.
thread class
Glossary “thread class” Definition:
Standard designation to indicate the closeness of fit between two threaded parts, such as a bolt and nut.
thousand
Glossary “thousand” Definition:
A number equal to ten times one hundred.
thinner
Glossary “thinner” Definition:
Solvent used to reduce the viscosity of a liquid.
third gauge
Glossary “third gauge” Definition:
Low side gauge used to check pressure drop across a suction-pressure regulator at the compressor inlet on some car lines.
third member
Glossary “third member” Definition:
Term for differential.
thickness gauge
Glossary “thickness gauge” Definition:
Strips of metal made to an exact thickness, used to measure clearances between parts.
thin wall
Glossary “thin wall” Definition:
Valve guide repair process that uses a bronze bushing.
thin wall guide
Glossary “thin wall guide” Definition:
An insert that may be used to repair a damaged valve guide.
thickening agent
Glossary “thickening agent” Definition:
Added to grease to achieve the proper viscosity or other required properties. It is usually a soap such as aluminum, lithium, sodium, or sodium. It may make-up 5 to 25% of the grease by volume.
thermostatically controlled air cleaner (TCAC)
Glossary “thermostatically controlled air cleaner (TCAC)” Definition:
Device used to regulate the temperature of the air entering the engine air cleaner as an aid in reducing emissions. May be also referred to as an EFE.