Antifreeze and Engine Coolant
Chevy Camaro RS
Grand Am GT

What is happening when the coolant reservoir is overpressurized and starts leaking from the cap Is this a thermostat problem or cooling fan switch problem?

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2005-12-31 04:46:31
2005-12-31 04:46:31

Is it too full? Well some vehicles are equiped with a little hose that will let coolant out if there is too much or too much pressure, but not all vehicles will have it. (If you are talking about the overflow tank, if the radiator cap is leaking, check to see if the cap is in good condition)

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No it probably means you have a leak some where. Try pressurizing your system to find the leak.

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NOTE: this answer is describing the location of the engine coolant temperature sensor - NOT the coolant sensor in the reservoir that warns when the level gets too low.The coolant temperature sensor is located directly adjacent to the thermostat housing. The thermostat housing is what the upper radiator hose (toward the right side of the engine compartment) connects to. You do not have to replace the reservoir to replace this part, but leaky coolant reservoirs are a common problem on this model.

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Vehicle takes an excessive time to attain normal operating temperature Heat not HOT with coolant full - thermostat not closing properly Vehicle heats up too soon - No heat with coolant full Coolant boils out of reservoir or top of radiator - thermostat not opening

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the reason why the coolant is spilling up over the reservoir is because the thermostat needs to be replaced because when the engine needs water the thermostat heats up from the engine and causes the springs to expant which opens a seal to allow the water throughout the engine i just realpaced the thermostat in my volkswagen

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Remove the coolant reservoir, flush it out, reinstall it and refill with proper coolant.

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The coolant reservoir on the MK3 jetta is located against the firewall. It is a small round reservoir.

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Coolant not being circulated through the radiator/radiator fan subsystem. Most probably the thermostat is malfunctioning. Two ways to test this fault: (1) Coolant accumulates in coolant reservoir. (2) Remove the thermostat and immerse in boiling water; if thermostat does not open, replace unit.

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To change the thermostat on a 2003 Dodge Neon SXT, first remove the drain plug to let the engine coolant drain into the pan. Unhook the coolant reservoir and remove the hose clamp. Spray the two thermostat housing mounting bolts with a solvent and pull out the old thermostat.

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Yes- coolant reservoir is designed to accept excess coolant - As coolant heats up it will expand and flow to the coolant recovery tank (reservoir) and as it cools (contracts) it will be sucked back into the radiator

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Tough to narrow it down with such little detail, but it sound like your car's thermostat may be malfunctioning and not controlling the temperature correctly.

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Reservoir light? You mean low coolant light. Low coolant level means the reservoir is low of coolant.

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It can if it is stuck closed the engine overheats causing hot air ( steam ) to flow backwards to radiator cap which releases and blows steam pressure into recovery reservoir which starts blowing out the coolant in the reservoir making a puddle on ground.

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Head gasket? Low coolant level? Water pump not circulating coolant? Thermostat not opening? Radiator plugged or restricted?

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It sounds like you have a blown head gasket. Combustion gases can enter the cooling system through either a blown head gasket or cracked cylinder head. The gases (under pressure) force coolant out of the reservoir. This also causes a void in the upper part of the cooling system , leaving no coolant at the thermostat and the coolant temperature sending unit. The result is a erroneous temperature Reading and will even prevent the thermostat from opening.

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"COOLANT THERMOSTAT" -COOLANT TEMP BELOW THERMOSTAT TEMPERATURE

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For the coolant level it is usually located in the coolant reservoir. For the coolant temperature it is usually located on the engine close to the thermostat or on a cylinder head. Need more info like year, make and model to help you more.

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Coolant is used to keep an engine in a vehicle at a temperature safe for operation. If no coolant is in the reservoir, an engine will not start.

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The ENGINE coolant reservoir is on the drivers side of the engine compartment next to the firewall

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The amount of coolant it will take to fill your vehicle is dependent upon how low the coolant level is. You can add coolant to your coolant reservoir. The reservoir will have an indicator of when the coolant system is full.

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there is hydraulic fluid reservoir for the fan... it's driven by hydraulic pump... and there is coolant reservoir...

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If the reservoir is low, ad a 50/50 mix of coolant and water. Or, buy it premixed and ad as is.


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