Hose Operation:

Transports coolant between the engine, water pump and radiator. Most vehicles call for specific premolded hoses that have exact curves and bends to keep them clear of obstacles under the hood. Flexible hoses may also be used.

How To Instructions:

Inspect - Check for obvious problems.
Replace - Out with the old, in with the new.

Automotive Glossary
Check out one of the largest dictionaries of automotive terms
on the internet.