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What items are in the cooling system loop?

I know there's the Radiator, and the Block, but what else?

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This is quite vague: water cooled or air cooled engines? Any particular make? Vehicles from this or the previous century? – Bob Cross Jan 20 '14 at 4:22
up vote 3 down vote accepted

You'll also have the:

  • Cylinder head(s)
  • Water pump
  • Thermostat
  • Heater core

Some cars also have water pipes in the inlet manifold, and some have water-cooled transmission oil coolers.

You've also usually got an expansion tank, but that's not part of the loop itself.

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So if you could put that list in bulleted form, including radiator, I will accept your answer, Thanks man! – am6sigma Jan 20 '14 at 15:57
  1. Radiator
  2. Thermostat
  3. Engine Block
  4. Heater Core
  5. Water Pump
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