What is a coolant bleeder valve?
The engine coolant air bleeder valve bleeds off trapped air in the top of the radiator. Now, you can hold the bleed valve in place with one wrench while turning the bleed screw with another. With less stress, there’s less chance of cracking the housing.
What happens if coolant system is not bleed?
If you don’t bleed the coolant system you can have air pockets in it. This can cause the gauge to spike and can lead to overheating. The coolant system can self-bleed some between the thermostat and over-flow tank, but to do it properly you should fill the coolant and run the car with the radiator cap off.
How do you know if you have air in your coolant system?
If it’s cold and you’re trying to keep your vehicle warm, you’ll notice that the air blows warm sometimes and not other times. This is a symptom of the coolant system having air in it.
Will a compression test tell you if you have a blown head gasket?
If your head gasket is blown, it will allow the compressed air in 1 or more cylinders to bleed off into the cooling system lowering the compression in that cylinder. If you find low compression in 1 or more cylinders, it could be an indication that you’ve got a head gasket leak in that cylinder.
How can you tell the thermostat is bad?
HVAC system won’t turn on: The most obvious sign of a bad thermostat is that the HVAC system in your building won’t turn on or respond to the thermostat. You should be able to turn on your heating or cooling system from the thermostat, or change operation back and forth from heating to cooling.
Will a blown head gasket stop your car from starting?
A blown head gasket can cause a car to not start if it floods the cylinders too badly. Other times it will start rough and smooth out as you described.
Why does my car crank but wont start?
When your engine cranks but won’t start or run, it could mean your engine is having trouble producing a spark, getting fuel, or creating compression. The most common causes are problems in the ignition (for example, a bad ignition coil) or fuel system (for example, a clogged fuel filter).