What is heat?

heat sink

Glossary “heat sink” Definition:
1). A finned, aluminum housing that dissipates heat and serves as a base on which electrical components, such as semiconductor devices, are mounted. 2). A heat dissipating section of the alternator that holds the insulated diodes or all the diodes, and carries heat away from the devices.

heat riser valve

Glossary “heat riser valve” Definition:
Control valve between the exhaust manifold and exhaust pipe that restricts the flow of exhaust, causing it to flow back through the heat-riser channel under the intake manifold. It acts as an aid to fuel evaporation and to speed engine warm-up.