Locate the stem valve and remove the cap.
Using the Schrader valve core bit in your 1/4" driver, unscrew the valve core from the stem.
Allow the tire to fully deflate before proceeding.
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To reach the valve stem, you will need to break the bead on the tire.
The bead on a tire is where the rubber meets the rim.
Insert the pry bar in between the rim and the tire. Push the pry bar as far down as possible. This will require a large amount of force.
The bead is broken when the tire is visibly separated from the rim. Use the pry bar to hold the tire down by leveraging it against the small lip inside the rim.
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Locate the stem valve on the inside of the rim.
It will be a large piece of rubber underneath the lip.
Use the diagonal cutters to cut off an appropriate amount of rubber from the under-side, as shown.
Remove the stem by pulling it through the face of the rim.
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Insert the new stem up through the rim. Use the diagonal cutters to help pull the stem into its seated position. There will be an audible pop when it is in correctly.
When using the diagonal cutters, take care not to pinch the stem too tight.
If you are having trouble seating the stem, use the rim as leverage.
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The tire must be re-inflated. Simply use your air compressor to inflate the tire. We recommend re-inflating to 32 p.s.i. to check for leaks.
When inflating, the tire will produce a loud pop as the bead returns to its place. If the tire is having trouble inflating, squeeze the tire against the rim to create a seal.
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Tire valve stems are the valves located in a vehicle’s wheel where the tires are inflated from.
They contain a spring loaded valve core that seals itself using the air pressure inside of the tire. Over time valve stems may get old, crack, become brittle, or begin to leak, causing larger problems with your tire and your driving experience.
When valve stems begin to leak, the tire will no longer hold air. Depending on the severity of the leak, the tire may leak air slowly, or in more sever cases not hold air at all, warranting replacement of the valve stem.
In most cases the the fastest way to replace a valve stem is to take it to a tire shop and have them remove the tire and replace the valve stem using aid of a tire machine. However, for instances where this is not an option, a tire can be removed and the valve stem changed manually. In this step by step guide we will cover how to remove a tire from a wheel manually, using a tire iron, to replace the valve stem.
Materials Needed
Step 1: Loosen the lug nuts.
Loosen the lug nuts of the wheel from which the valve stem is going to be replaced.
Step 2: Raise the car on jack stands . Set the parking brake, and then raise the vehicle and secure it on jack stands.
Step 3: Remove the wheel. Once the vehicle is raised, remove the wheel and set it flat on the ground with the outside of the wheel facing up.
Step 4: Deflate the tire. Remove the cap from the valve stem, and then remove the valve stem core using the valve stem removal tool to release the air from the wheel.
Once the valve stem core is removed the tire should deflate on its own.
Step 5: Separate the tire’s bead from the wheel. Next, use the sledgehammer to break the tire’s bead free from the wheel.
Hit the sidewall of the tire using the sledgehammer in the same place until the bead breaks loose.
When the bead breaks loose you may hear a crack or popping sound, and you will see the inside lip of tire visibly separate from the lip of the wheel.
Once the bead has been broken, continue around the tire with the sledgehammer until the bead is completely broken all the way round the tire.
Step 6: Lift the lip of the tire up from the wheel. Once the tire’s bead has been broken, insert your tire iron between the edge of the rim and the inside lip of the tire, and then pry upward to pull the lip of the tire over the edge of the wheel.
Once you have pulled the lip of the tire over the edge of the wheel, work the tire iron around the rim until the entire lip of the tire is off the rim.
Step 7: Remove the tire. Grab the tire by its removed lip and pull it upward so that the opposite lip that was at the bottom of the wheel is now touching the top edge of the rim.
Insert the tire iron in between the the tire’s lip and the edge of the wheel and pry upwards to pull the lip over the edge of the rim.
Once the lip is over the edge of the rim, work the tire iron around the edge of the wheel until the tire is removed from the wheel.
Step 8: Remove the valve stem. Once the tire is removed from the wheel remove the valve stem. Use the needle nose pliers to pull the valve stem free from the wheel.
Step 9: Install the new valve stem. Take your replacement valve stem and install it from the inside of the wheel. Once it is in position use the needle nose pliers to pull it through into place.
Step 10: Reinstall the tire. Reinstall the tire onto the wheel by pressing it down over the the rim until the bottom bead clears the edge of the rim.
Then press the side of the tire down underneath the edge of the wheel, tuck your tire iron in between the lip of wheel and the bead, and then pry the bead over the lip the of the wheel.
Once the bead clears the lip of the wheel, work your way round the entire wheel until the the tire is completely installed on the wheel.
Step 11: Inflate the tire. Once the tire has been re-installed onto the wheel, turn on the air compressor and inflate the tire to the correct specification.
For most tires, the recommended pressure is between 32-35 pounds per square inch (psi).
Step 12: Check for leaks. Once the tire is properly inflated, double check to make sure that there are no leaks of any kind, and then reinstall the tire onto the vehicle and lower it off of the jack stands.
For most cases, the easiest course of action to replace a valve stem would be to simply take it to a tire shop, have the tire removed with a machine, and then have the valve replaced.
However, in the instances where that is not an option, a valve stem, and even a tire, can be removed and replaced manually with the correct tools and the correct procedure. If you find that there is a leak or damage in the tire and not just the valve stem, you may want to replace the tire entirely.
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In this guide we will explain how to change a tire valve so that people with any mechanical background can attempt this repair.
This guide assumes that you remove the wheel from the vehicle. Refer to this manual for wheel removal instructions.
Nipples serve the simple purpose of being a duct for inflating tires, but they come in many varieties. If you want to replace a nipple, you need to know what types exist.
Here are some types of nipples:
Now let's see how the nipple is replaced.
You can do the replacement at home as a do-it-yourself repair job.
But it is difficult to separate the tire bead from the wheel on your own.
Instead, it's best to leave repairs to professional mechanics or tire dealers. Otherwise, you risk injury or further tire damage.
With that said, what tools do you need to replace?
© shutterstockYou will need:
So, how to replace the nipple yourself :
Installing a replacement nipple is not always possible. Sometimes you will have to purchase a brand new tire.
© shutterstockHere are some common causes of nipple failure:
If you have a bleed nipple, you will have a slow leak that is hard to find. A tire leak can be dangerous while driving. You risk an explosion that could cause you to lose control while driving.
If you have a defective nipple, take it to a professional tire shop as soon as possible or have a field mechanic come to your driveway and help you.
Alternatively, if you have a leaking tire, you can remove the flat tire and replace it with a spare tire. But you probably still want to fix a damaged valve on your main tire.
As shut-off and control valves the valve is most often used. If your valves need repair, you can call a plumber, he will repair the valve, but sometimes a situation arises that you have to roll up your sleeves and take on the repair yourself. Article master plumber will tell you how to fix a valve leak without replacing it.
Water valve repair
Water valves are characterized by a very simple design, so failures are quite rare. The biggest problem is thread stripping due to careless handling.
As a rule, valve repair for an unprepared person causes certain difficulties, which are not associated with the laboriousness of the repair, but with ignorance of its design and device features. The figure shows a drawing of the valve itself with an internal device:
To replace or repair the valve, we need an adjustable wrench, pliers, open-end wrenches 17-19.22-24, linen or linen FUM , a piece of rubber and stuffing box packing.
Often the problem with a valve valve leak is solved by tightening the nut holding its stem. This can be done without blocking the pipe, directly under pressure. The nut is tightened with an adjustable wrench in a clockwise direction. But it is important not to overdo it with a stretch, so as not to strip the thread and break the tap.
If the valve does not turn off the water, then it is necessary to turn off the taps on the riser. After closing the valve on the riser, make sure that there is no water pressure. Using an adjustable wrench, unscrew the valve head (crane box).
Then unscrew the union nut, making sure that the stem does not rotate with the nut. Loosen the screw with a screwdriver. Remove the flywheel, washer, union nut, stuffing box bushing. Replace gasket . The gasket diameter must be equal to the valve diameter. If stem or valve breaks, replace both parts. Wrap the stem with seal strands and tamp them with a screwdriver.
Insert bushing onto stem and press packing. Then hand-tighten the union nut about 2-3 turns of thread.
Wind the linen strand of the seal and screw the repaired head into the valve body.
