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This instructable will walk you through the simple process of "burping" or getting all of the trapped air out of your cars cooling system. ... Despite all the complaints about DexCool coolant, I have never had an issue. ... in that way, my cars are as reliable as possible regarding cooling ...
Aug 13, 2012 - Uploaded by JerryRigEverything
Let me know if that link doesn't work. Anytime you change the radiator, change the thermostat, drain your ...
Video embedded · Buy the items featured in this video! Click here: https://rdy.cr/08fb93 How To Use A Spill Free Funnel to burp your radiator Lisle 24610 Spill-Free Funnel ...
How to Burp your car's cooling system - Instructables
www.instructables.com/id/How-to-Burp-your-cars-cooling-systemVideo embedded · Intro: How to Burp your car's cooling system. This instructable will walk you through the simple process of "burping" or getting all of the trapped air out of ...
1. The radiator cap if working correctly it will release pressure in the system provided the cap you have is the correct pressure setting. If you are having a problem with pressure then replace the cap with a new radiator cap with the correct pressure setting. Do not use a cap with a pressure setting other than the original equipment pressure spec. So you do not go to the parts store and buy any radiator cap on the shelf that fits because they come with different pressure ratings and some of these will be totally unsuitable for your car.
2. If the pressure valve is stuck in the "old" cap the pressure release system will not work.
Air pockets in the cooling system can definitely cause overheating and can retard coolant flow through the system. If you are draining the radiator to replace the coolant or replacing the radiator you need to follow the correct procedures for bleeding air out of the system for that particular engine after coolant refilling. Some engines have bleeder screws on the cooling system to assist in the air bleeding procedure and some don't.
There are various causes for overheating so don't assume it will necessarily be solved by bleeding any remaining air from the cooling system and replacing the radiator cap with one that works.
Other causes can be...........
1. Faulty cooling system thermostat. (Replace the Thermostat)
2. Faulty water pump, especially if the impellers have corroded away or have disintegrated in the case of those design genius water pumps with plastic impellers. (Replace the water pump)
3. Cooling fans not working and if so the cause needs to be tracked. Check that your fans are kicking in. If the engine is overheating the fans should be running because they will switch on when the coolant reaches a specific temp and well before the coolant gets excessively hot.
4. A partial blockage in the coolant passages inside the engine but not in the radiator if you have a new one. If the coolant is not changed at the required intervals(frequently the case with many owners) or is over diluted with water you can get a build up of debris. If products like stop leak have been used in the system this can create similar problems with partial blockages inside the engine coolant passages.
5. A compression leak into the cooling system.
If you have bled air from the system and have continuous air bubbles in the cooling system I would suspect a compression leak. In that event a basic leak down test will show if you have compression gasses leaking into the cooling system and from which cylinder(s). The spark plug is removed and compressed air is forced into the cylinder via the spark plug fitting and air bubbles will show up in the coolant of there is a leak into the cooling system.
Have the problem with overheating addressed immediately. Running the engine with an overheat condition will cause expensive engine damage many times the cost of fixing the overheating issue.
sounds like air in system ...
Leave the radiator cap off, turn the engine on and let it
run until the radiator "burps": You will see the coolant level drop and
may see or hear a large air bubble come to the top as the system burps.
Keep an eye on the temperature gauge throughout this process
Refill the radiator to the top and coolant reservoir as needed.
Put the radiator cap back on.
Note that if the engine runs hot after this procedure there
may have been another pocket of air that "burped." Let the engine cool
down and then add more coolant to both the radiator and the coolant
To start with, the cooling system is a sealed system, so anytime you have to add coolant it went somewhere. Either an external leak onto the ground, or an engine leak were the engine is burning it. If you added coolant and the heater is not working all the time, the system could have air pockets which would need to be expelled.
Follow the lower radiator hose back from the radiator to the engine. Where it attaches is the thermostat housing. Open that up, remove the old thermostat, put the new one in (there's a small bleed valve on the face of the thermostat -that needs to be at the 12 o'clock position), reassemble, and then burp the cooling system (click my screenname, go to Tips and Tricks, and follow the burping instructions there).
I have a 1985 Jetta diesel. What I did since the car has no way of bleeding the air out of the system via bleeder screw I parked the car on a slight incline leaving the tank for the fluid at a higher level. I ran the car until the thermostat opened (The thermostat is on the bottom of my engine) I kept topping off the antifreeze. I also kept a jug of anti freeze and water in my car for the next few day. Whenever I got done driving the car and the car cooled off I would check it to see if I needed to top it off. I finally got the air out of it. You could call the vw dealer to see if there is a bleeder on the engine, if so open the bleeder and fill until antifreeze/water comes out, then close the bleeder and top it off to the full level. Just to be safe check the level after you drive the car. Air can still get trapped.