Why does my car thermostat keep going up and down?
If the coolant level in your car has gone down, air may build up in the empty part, and cause an air pocket. Due to this, the air may get trapped inside and cause the thermostat to go up and down.
Why is my water pump and radiator still overheating?
Changed water pump, radiator and thermostat. Car still overheating it has a leak in the headers and i am getting that replaced too. Can that be why it is still overheating? My car has 170000 miles. My car has an automatic transmission. I’m sorry to hear about your overheating issues.
Why is my car’s coolant reservoir overflowing?
If they’re both cold then it is probably a coolant flow issue. Thermostat stuck or waterpump has eroded away to nothing. If one is hot and one is cold then it is probably the head gasket. If both are hot then wait for the radiator fans to come on and check again after they’ve run for a few seconds. I haven’t checked the different hoses yet.
Why is my water pump and thermostat not working?
The radiator, water pump, and thermostat are definite possibilities, but there are a few others that are possible also. A faulty cooling fan is the first thing that comes to mind, but it could also be a head gasket issue, clogged coolant passages inside the engine, or faulty radiator hoses.
How does the overflow hose in a radiator work?
An overflow hose runs between the radiator cap and the reservoir tank where extra coolant is stored (and added). As pressures within the cooling system change with coolant temperature, a valve in the radiator cap allows coolant to flow back into the reservoir to relieve pressure buildup which naturally occurs.
Where are the coolant hoses located on a BMW?
Inside this passageway will be a dedicated pipe for the coolant. One such example is found on BMW-sourced V8 and V12 engines. An overflow hose runs between the radiator cap and the reservoir tank where extra coolant is stored (and added).
What causes a car to overheat with a new thermostat?
A leaky head gasket or a cracked cylinder head are normally due to expansion and contraction of engine materials along with high pressures caused by excessive overheating. The Integrity of the system cooling system is compromised if there is a leaky head gasket or cracked cylinder head.
What to do if coolant comes out of overflow tube?
Radiator cap would be the first thing to replace. Then check the coolant level in both the radiator and the reservior. If your overflow reservoir is the type with both the tube from the radiator and the overflow tube attached, then the two tubes have been switched. Another possibility – head gasket.