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How to Change a Flat Tire

Driver's Ed
by

Soko Cheng

on 1 October 2012

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Transcript of How to Change a Flat Tire

Tim, Mary, Jessica, Soko How to Change a FLAT TIRE What is low tire pressure?
The tire pressure measure how much air is in the tire of a vehicle measured in pounds per square inch. If you have low tire pressure most of the tires’ surface touches the ground and this will create more friction which causes them to wear out or overheat. Identify Low Tire Pressure Importance
The pressure can affect cornering, braking, and stability. The treads on the wheels separate due to overheating so you might not be able to stop the car quick enough. Keeping your tires filled up with the right amount of air can also save you money on fuel and new tires. Checking Tires
Check ALL the tires of your vehicle at least once a month.
The pressure would be more accurate when the wheels are cold. But you can check it anytime your vehicle is parked for a few hours or have not been driven for more than a few miles. How do you know?
Obviously when you have a flat tire, you have low tire pressure.You can go to the gas station and ask them to check it for you or do it yourself with a pressure gauge. There's also “Low Tire Pressure” warning light on the dashboard. Recommended Pressure
Check your Owner’s Manual, driver’s door pillar, the glove compartment, or the gas filler door.
DO NOT USE the number given on the tire because that is the maximum for the tires which is different from the recommended (the recommended pressure is always lower than the maximum) How to use the gauge
Unscrew the cap on the air valve on the tire. Press the tire-pressure gauge against the valve. If you hear hissing press down harder. Read measurement on the gauge and add the amount of air needed. Helpful Links/Resources:
http://www.cars.com/go/advice/Story.jsp?section=ct&subject=adv&story=ctTire
http://www.cartalk.com/content/every-wonder-how-low-tire-pressure-warning-light-works
http://www.ehow.com/video_112746_check-tire-pressure.html
http://velonews.competitor.com/2010/01/news/cyclocross/technical-faq-tire-sealants_102346
http://www.alpharubicon.com/bovstuff/tirepluguzi.htm
http://car-repairs.knoji.com/how-to-plug-a-flat-tire/ Donut vs. Full Size Tires Donut tire spares save space and weight and this helps maximize utility and gas mileage. Because donut spares have speed and distance restrictions, the common purpose of the donut spare is to get the car from where the original tire was punctured to a place where a new full size tire can be mounted. Most spares can go up to about 50 mph and travel up to 100 miles. Spare tires are commonly found in the trunk of the car, underneath the rear of the car, or in the engine bay. Full size tires are usually identical in size and type to the tires on the vehicle. These are usually for sport utility vehicles and light trucks.Due to the size of these tires, it is usually kept on the exterior of the car. Examples would be the rear door or the front hood. The full size tire is about 14 pounds lighter than the donut tire. Full size spare One way to quickly fix a flat tire is to use a tire plug kit. Using a tire plug kit First, you must remove the foreign object from the tire. Then you can mark the hole with chalk or something so it will be easy to find. There will be an abrasion tool in your kit that has a handle, you will roughen up the hole by putting it into the puncture, and twisting it around. Next, you will use a tool that with an eyelet that looks like a sewing needle, and place the plug in it. After that, you will place the plug into the eyelet of the tool, and then put it into the hole. Once you put it in the hole, you can take the tool out and cut any of the remaining plug that is sticking out. When you do not have much time to change your tire, there are few quick ways to fix it. One way is to use a tire plug kit, and another is to use a tire sealant. Quick/Immediate Fixes Another quick fix for a flat tire is tire sealant. Tire Sealant Tire sealant can be used to temporarily fix a flat tire. All you have to do is inject it into the tire through the tire valve. Once you start driving again, the air that escapes helps the substance move around inside the tire so it will cover the hole. The seal fibers will then become a plug. Tire sealants are great for emergencies, but they are not permanent solutions, so it is recommended to get the tire changed or fixed as soon as you can. Tire Sealant How to change a tire You will Need.... A car jack, spare tire, cross wrench, and a few heavy objects Make sure that the heavy objects can keep your car from rolling. Find a flat and sturdy surface to change tour tire at. Steps 1-3 Step 1: Put your car in park and secure the wheels by placing the heavy objects in front of each wheel. Step 2: Place the jack under the car right next to the tire you are replacing. make sure that the frame is metal where the jack is placed. Step 3: Raise the jack until the car isn't off the ground, but is still supported by the jack. You shouldn't be able to spin the tire just yet. Remove the hub cap and loosen the nuts, but don't take them off yet. Steps 4-6 Step 4: Lift the car all the way off of the ground. You should be able to spin the tire now.

Step 5: Remove the nuts all the way with your hands and remove the tire from the hub.

Step 6: Place the spare tire on the hub and tighten the nuts with your hands as much as possible. Important! When tightening nuts, always tighten them in a star pattern to make sure the tire is ballanced correctly. Steps 7-9 Step 7: Lower the car without putting it's full weight on the tire that you are replacing and tighten the nuts with the cross wrench as much as possible. Step 8: Lower the car all the way and tighten the nuts with the cross wrench as much as you possibly can and replace the hub cap (if possible).
Step 9: Remove the jack and go to a meachanic to repair your original tire.
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