![]() ![]() If you are losing fluid from the expansion chamber, sometimes called a header tank, you need to understand why. The coolant will help to raise the boiling point of the fluid, which, when combined with the pressurised system, can help to prevent overheating. And don’t just use water, you should be using a mixture of water, anti-freeze, and coolant. Air doesn’t work well as a coolant medium – unless it is flowing over the external cooling fins – so keeping your bike’s fluid at the optimum level is vital. Sounds simple but too little fluid in the coolant circuit can cause overheating. To correctly check the level, get the bike upright to save overfilling the tank Low fluid level The fluid in this expansion tank looks low, although the bike is on the side stand. Either way, it’s not ideal to run an engine like this for any amount of time. Not only will the firing piston be fighting the rotation of the crank, it can cause an uneven flame front causing hot spots on the piston crown or worse, burn a hole in your piston. In this scenario, the air/fuel mixture can ignite while the piston is still on the upward stroke, obviously this isn’t the most efficient way to run an engine. When this happens, the combustion in the chamber can be too slow to ignite, prolonging the combustion cycle and causing the exhaust side of the combustion chamber to heat up too much.Īnother cause, less of a problem on modern bikes admittedly, is running the engine with the ignition too far advanced. ![]() Overheating possible causes on older enginesĪ lean running engine has an air/fuel ratio that has too little fuel and too much air in the mixture. In that case, you may either take a look at the coolant reservoir as explained above and add some coolant to it or have it brought into an auto maintenance shop if you are not sure how to refill the coolant.With much of the heat from a running engine coming from combustion, let’s look at how this act can negatively impact an engine by running too lean. Or, if you see your engine coolant warning light lit on the dashboard, this also indicates either your coolant level is low, or your vehicle overheats due to some error in your cooling system. Bring the level to F, but do not overfill. Again, before you do that, you need to make sure the engine is cold, and there isn't too much pressure built up inside. If the fluid is close to or below the L marking then you need to add more coolant to the reservoir. On the side of the reservoir, it has an L(low) and F(full) markings, and as the tank is translucent, you can see your coolant level without opening the cap. The owner's manual also specifies the proper coolant for your vehicle to protect against freezing and corrosion. If you can't find it, consult your owner's manual as it should explain where it is located. As the reservoir cap is labeled as coolant, it's easy to find it. Once you open your hood, locate the coolant reservoir. So always make sure your cooling system is cold before you start inspecting your coolant level. If you do it while it's hot, hot coolant can shoot out of it, and that can lead to a bad burn. If the automobile is hot, that means it's under high pressure, and opening the reservoir cap can be extremely dangerous. If your car has been running in a while, your engine, radiator, and reservoir become very hot and, you do not want to touch the reservoir cap or radiator hoses before they're completely cooled down. When checking your coolant level, the first thing you need to know is you shouldn't check it if the engine is still hot. Before you go to check your coolant level ![]()
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