How does the coolant in the resivour enter the system

Asked by Jul 04, 2016 at 11:44 PM about the 2007 Pontiac G6 SE V6 Sedan

Question type: Maintenance & Repair

4 Answers

24,785

Its pulled in by vacuum.

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67,365

Coolant is like anything else, when it gets hot, it expands. This forces coolant out of the radiator, through the little hose that connects to the plastic reservoir, and into the reservoir. When the coolant cools down it contracts, pulling coolant back into the radiator. This is why it's very important to have the radiator filled to the tippy tippy top when the engine is cold. Like from sitting overnight. HTH. -Jim

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Best Answer
22,415

through the little rubber hose-

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4,825

The reservoir should never be empty. There is a cold level line and a hot level line. Do as Jim said and fill the radiator to the top when cold and then add fluid to the reservoir cold line.

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