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You must wait for the thermostat to open up, crank your heater on full, you will get only cold air once the thermostat opens it will start to heat up, heather runing wait for thermostat to open youll see your coolant bottle bubble up and go down , then you loosen the bleeding valve if you got one, cooling system service should be done all together , change thermostat,flush the coolant system, replace hoses if needed, if thermostat is shut and wont open up your more likely will blow a hose from the pressure .ty
Here is a diagram showing where the thermostat is located on a 1994 Nissan Altima. Most vehicles are fairly similar as well the main water hose that goes to the engine is usually right next to or attached to the thermostat housing. Also once you take this hose off to get the thermostat you are going to need the bleed the coolant system because there will be air in the system. A simple google search or wikihow will show you exactly how to bleed air out with pictures and simple instructions. Good luck.
This is s common fault after replacing thermostat, there is a system bleed screw located on radiator which will need bleeding? If you warm engine up"only warm not hot" then locate bleed screw and slacken off, not unscrew all the way? You will hear a hissing noise of the air in you system. Very similar to central heating radiator in a house! Once you have water coming through then tighten up bleed screw/bolt and give engine a bit of a run. Hope this helps
have you replaced the thermostat , checked for leaks , etc. ? If so, when adding coolant did you bleed the system ? The system has to be bled of air bubbles . Almost all cars have a bleeding screw right at the thermostat housing. It is a regular screwdriver screw. you must bleed the cooling system after adding coolant . If you can't find a bleeding screw, get some thick gloves so you won't burn your hands . Turn the radiator cap until you hear air hiss out. Let it bleed until only coolant wants to come out into the reservoir. The car must be running to operating temperature when you blled the system.
Definitely recommended - Process is fairly simple, let the vehicle idle and/or reach normal operating temperature - turn the"bleed screw" slightly open and note as the air bubbles escapes from the screw. Also make sure the radiator is topped up with sufficient coolant. Funny enough, the mechanic should have taken care of this process after replacing the thermostat....
Once you are done removing the old coolant refill the system along with the overflow tank. Start the engine with the cap
off and continue filling while the engine warms up and the thermostat
opens this should remove bleed out most of the air. Once the thermostat is open rev the engine a bit and this should remove any remaining air.
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