Why is my coolant reservoir boiling?

One of the most common causes is a blown head gasket, in which the air pressure inside the cylinder heads is transferred to the cooling system. This escaped air causes bubbling in the coolant/antifreeze reservoir, which can often be mistaken for boiling.

Why is my 2002 Pontiac Grand Am overheating?

While there are a variety of reasons your Pontiac Grand Am is overheating, the most common 3 are a coolant leak (water pump, radiator, hose etc.), the radiator fan, or a failed thermostat. Coolant leak (water pump, radiator, hose etc.)

Can a bad thermostat cause coolant to bubble?

Thermostat. A faulty thermostat that causes sporadic opening and closing can cause a churning and bubbling effect seen in the radiator or expansion reservoir. The rapid closing and opening of the thermostat valve can also cause a pounding noise inside the radiator, due to the slamming pulses of coolant.

Is it worth fixing a blown head gasket?

A vehicle’s head gasket is worth fixing, so long as the vehicle was in good condition prior to head gasket failure.

How do I know if I need a head gasket or a thermostat?

Hey there. Test to see if the head gasket is blown the cooling system will need to be pressurized using a cooling system pressure tester to put pressure on the cooling system to see if it holds pressure. If it does not hold pressure and no external leaks are found then the head gasket is leaking.

What are the symptoms of a bad thermostat in your car?

Symptoms of a Failing Car Thermostat

The temperature gauge reads high and the engine overheats.
The temperature changes erratically.
The vehicle’s coolant leaks around the thermostat or under the vehicle.

How do I know if my water pump is bad?

Five Signs Your Water Pump Is Failing

Overheating. A dead or dying water pump cannot circulate coolant through your vehicle’s engine and, as such, the engine will overheat.
Coolant Leaks. Coolant leaks from the water pump are common and a clear sign that it’s time to replace the pump.
Corroded Water Pump.
Whining Noises.

How do I know if my thermostat or water pump is bad?

What You Should Know About Bad Water Pump Symptoms

Coolant leak.
Engine overheating.
A whining, sometimes a grinding, noise coming from the front of your engine.
Coolant warmer than normal during the hot summer months.
Not much heat coming out of the heater during the winter, accompanied by low coolant level.

Why is my coolant not circulating?

If coolant isn’t flowing through your system it’s because the thermostat has malfunctioned (stuck closed) and isn’t allowing coolant to flow when the car get’s to temperature. The could be because the rad is blocked, the water pump has failed or the thermostat isn’t working.

What happens when water pump fails?

When the water pump fails completely, it will not be able to circulate coolant through the engine block. This results in an overheating situation and if not repaired or replaced quickly, can cause additional engine damage like cracked cylinder heads, pushed head gaskets, or burnt pistons.

How do you troubleshoot a water pump?

Check that electrical power is turned on and being delivered to the pump control switch and to the pump.

Check for a tripped circuit breaker or blown fuse.
Check for low voltage.
Check for broken or disconnected electrical wires.
Check for a defective motor.
Check for a jammed or broken impeller assembly.

Why do I suddenly have no water?

If the low water pressure seems restricted to a single faucet or showerhead, the problem isn’t with your pipes or water supply, but with the fixture itself. If it’s a sink, the most common causes are a clogged aerator or clogged cartridge. These cloudy spots block the flow of water and decrease water pressure.

Is there a reset button on a water pump?

Hold the lever in place for one minute to allow the water pressure to build inside the pump. Your well pump is reset when you can release the lever and it continues to run. Your well pump may have stopped working due to lack of power.