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My coolant in the reservoir disappears - 1999 Plymouth Voyager

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You need to fill up the radiator with antifreeze when the engine is cold. After filling the radiator, bleed the system with a little screw located near the thermostat. let all the air out . Do this while the car is in operating temperature. Wait till it cools off , then check the reservoir again. Fill it with antifreeze up to the line indicated on the reservoir.

Posted on Nov 18, 2009


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: engine overheating there is no coolant leak but it overheats and

1st it is imperative that that cooloant mixture is correct. once you have the correct mixture have the thermostat replaced. Or just have a mechanic replace the thermostst and they will balance the coolant to water mixrure


Posted on Feb 16, 2009

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2 Answers

Coolant disappears, but why no visible leakage?

You need to get your hands on a coolant pressure tester and pump the system up to 16 psi to test for leaks. Pull spark plugs, disable fuel pump relay and check for seepage into the combustion chambers, after the test crank the motor over and see if it comes out the spark plug holes, possible bad head gasket, also check to see if heater core is leaking out the ac condensation tube. Rent the tool, if possible, they also sell a shop air style too that can be adjusted to keep 16psi at the fill reservoir all the time instead of pumping and pumping up the system with the hand pump tester.

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Loses water from resevoir but not from radiator

So the level keeps dropping in the reservoir? If you have to keep adding coolant to the reservoir, the system is leaking or losing coolant somewhere. Have the system pressure tested to find the leak. Is the reservoir itself leaking? When the level gets low enough, first the reservoir will go dry, then the radiator level will start to drop.
Here's how the reservoir works: coolant is under pressure from the radiator cap seal. As coolant heats up from hot engine, it expands, and pressure forces the radiator cap seal up, coolant is forced into the reservoir-remember the hot mark on the reservoir? When car is shut off, coolant contracts, creating a vacuum in top of radiator. This vacuum works to suction coolant back from reservoir into the radiator, keeping the radiator topped up, and coolant should now be at the lower cold mark on the reservoir. It is a closed, sealed system. The only loss of coolant will be a very small amount of evaporation from the reservoir. If coolant level keeps dropping, there is a leak somewhere.

Nov 22, 2013 | 2000 Jeep Grand Cherokee

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Anything on floor if not goes tale pipe ,you can try head gasket fix good one.

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Nov 16, 2012 | 2005 Nissan Sentra

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We installed a new radiator and it keeps overheating even after adding coolant and/or water. it is not leaking. do you know where the fluid is going? My husband and kids are stuck on the side of the...

Coolant only disappears one way. A leak. But the worst case is when it leaks into the engine. Gives you a chocolate shake for oil. Coolant doesn't dissipate like boiling water because it's sealed and why it overruns into the reservoir. As it cools **** out of the reservoir. If coolant level is lowering and causing overheating it's leaking. Just hope it's not into the motor.

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Where do i refill coolant? message reading low engine coolant.

please rate, thx Coolant Recovery System NOTE: When the water thermostat (8575) is closed, there is no flow through the radiator coolant recovery reservoir (8A080).

Trapped air in the cooling system must be removed. A pressurized radiator coolant recovery reservoir system is used which continuously separates the air from the cooling system.
  • When the water thermostat is open, coolant flows through the small hose from the top of the radiator outlet tank to the radiator coolant recovery reservoir.
  • The radiator coolant recovery reservoir separates any trapped air from the coolant and replenishes the system through its radiator coolant recovery hose to the water thermostat housing.
  • The radiator coolant recovery reservoir serves as the location for:
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    • coolant expansion during warm-up
    • system pressurization from the pressure relief cap and
    • air separation during operation
  • The radiator coolant recovery reservoir is designed to have approximately 0.5-1 liter (0.53-1.06 quarts) of air when cold to allow for coolant expansion.


Jul 08, 2009 | 1995 Lincoln Continental

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How do you replace coolant reservoir in 2002 Kia Spectra? The fill neck just disappears beneath the fender.

you have to take the tire off, then carefully take off the undercover in the wheel well. be sure to remove all fasteners. Once the cover is off, you should have very easy access to the reservoir. I think there's two bolts, 10mm or 12 mm wrench. And there's a hose clamp on the small hose leading to the radiator that needs to come off too. Good luck.

Jun 10, 2009 | 2002 Kia Spectra

1 Answer

Engine overheating there is no coolant leak but it overheats and

1st it is imperative that that cooloant mixture is correct. once you have the correct mixture have the thermostat replaced. Or just have a mechanic replace the thermostst and they will balance the coolant to water mixrure


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Cooling sysem leak

Leak found at heater.  Most of coolant added in attempts to locate leak was retained on the floor of the passenger compartment --- hence the disappearing coolant phenomenom. About 5 gallons of water were obtained with wet vac of region under floor carpet. Thanx to those who considered the problem.

Sep 04, 2008 | 1996 Volvo 850

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