How To Burp A Motorcycle Coolant System
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- čas přidán 25. 08. 2024
- How To Burp A Motorcycle Coolant System
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If you have cracked open the cooling system on a motorcycle, you might find that getting the air out can be tough. In this video, you will get an idea how to burp a motorcycle coolant system. I am using a Suzuki DRZ400S as an example of how to get the air out of the cooling system.
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Some cooling systems on motorcycles have a closed coolant reservoir bottle. Meaning there is no cap to remove to add coolant. In this video, I talk about how I used a large syringe to push extra coolant in the overflow reservoir. I did this to help monitor if the system needed anymore added or not. If you need a syringe, you can purchase one here:
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Most motorcycles have smaller lines and smaller cooling chambers withing the engine, thus making it easy for any air to cause the bike to overheat.
If you have replaced a cooling system part or just want to flush out the old coolant fluid and add new, you will need to know how to burp the air out. The method I used is much like on a car. With the radiator cap off, I ran the bike until it got hot. Once hot, I let it run for 3 to 4 minutes burping out air and coolant out of the radiator cap inlet. I then would let the bike cool for about 30 minutes, then top off the coolant level. I would then repeat the same process of letting it run and burp air out with the cap removed.
I then let it cool off again for another 30 minutes, top the fluid level off but this time put the radiator cap on, start it and let it get hot. I then found the bleeder screw on the other radiator, the one without a cap. I opened it up and let it burp out air and coolant for about a minute. Now the system has been bled of air. Let it cool for an hour and then remove radiator cap and top off coolant level. More than likely the coolant reservoir bottle will be low to empty. Using a syringe, I pushed coolant into the bottle until it was about a quarter way full. This is a good way to monitor if the system is still low on coolant. If low, when it cools after being hot, the radiator will suck up any left in the bottle. If it is about the correct level in the radiator, the overflow bottle will always stay about the same level.
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Want to know the best burping tip ever? Push a long funnel down into the filler, that makes a nice tight fit at the filler neck. Fill the main body of the funnel about half full of coolant. Now run the bike. Not only won't coolant splash everywhere, the rad will actually drain coolant out of the funnel and stay topped off, as the air is expelled from the system. You're welcome 😉
thanks for that. Im having terribly time with my v strom 1000....ran really hot. I haven't had the balls to run the bike for a few months....I think i can handle this...lol
Awesome video and extremely helpful.
I heard just kick your bike a few times then pour more on a regular change gets any air out
By having air in the system, would it cause the fan to not turn on, on some bikes?
It is possible for air in the cooling system to keep the fan from turning on. The temperature sensor has to be in the coolant to work, if the air is keeping coolant from getting to the sensor, then it will never switch the relay on to turn the fan on.
One trick you can to to ensure it is getting coolant to it is by unscrewing the sensor. Not all the way out but enough for air and coolant to bleed out. You will have to start the bike and get it close to operating temp. Already have the sensor backed out a bit and see if coolant leaks out. You may hear air seeping out first.
Good think I ran into this comment cause I’m having the same problem now
What radiators are those?
That is the factory radiator for that bike.
I have a '21 400sm, and these are not the factory radiators...
@@RodsshopOrg The bleed side is factory, the cap side is a "Mishimoto"