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Car repair work often requires lifting the car, from changing brake pads to patching tires. You will have to use a jack to lift the car, unless you have large hydraulic lifting equipment like at a garage. The jack is generally easy to use, but care must be taken to ensure safety, especially when you are working under the vehicle. Luckily, you just need to follow a few common sense rules.
Steps
Pay attention to safety issues
If you can’t meet the safety conditions or don’t know how to handle your case, ask someone else for help.
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Park the vehicle on a flat and firm surface. Letting the vehicle slide off the jack is a very dangerous situation for both you and others. To prevent this, always work on a flat surface, away from moving vehicles or sources of distraction. The work surface must be hard and firm so that the vehicle does not move while you work. [1] X Research Source
- Concrete entrances or garages are suitable places. The front yard is not a good choice even if it is flat, because the ground is not strong enough to support the car.
Insert wheel. Wedges are blocks made of metal and rubber to prevent wheels from rolling. Insert a wedge in each wheel opposite the position you need to lift. [2] X Research Source
- If you don’t have a wedge, use a brick, large stone, or wedge-shaped block of wood. [3] X Research Sources
Double check to make sure the car is parked. Set the handbrake and check to make sure the transmission is in “P” gear. If the car has a manual transmission, set it to the lowest gear.
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In uncertain conditions, take extra precautions. With that said, the instructions in this section are intended to protect you and others in the event that the vehicle slips from the jack. If you are unable to meet the above conditions but are “forced” to jack up, follow the instructions below to ensure greater safety:
- If you must jack the vehicle on soft or cracked surfaces, use a thick, flat piece of wood as a stable base for the jack.
- If you must jack the vehicle on a slight incline, park near the curb and rotate the wheels to touch the curb. The purpose is to prevent the car from rolling away and hitting other people after sliding off the jack.
- Similarly, if you don’t have anything to insert the wheel, turn the wheel to the curb. [4] X Research Sources
- Never jack the vehicle in the emergency stop lane. If you must jack your car near traffic, place a warning light. If you have warning lights, clutches or poles, use them to signal other vehicles.
Click the car up
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Find the set point. Most cars have multiple points along the body designed to place the jack. If you place the jack in the wrong place, the weight of the vehicle can damage the chassis (or worse, cause the vehicle to slide off the jack). But don’t worry, the user manual always tells you where to place the size. [5] X Research Sources
- Usually there is a jack set point on each side behind the front wheel and in front of the rear wheel. It is usually located next to the metal or plastic pad underneath the door.
- Sometimes, cars have two more center jacks located just behind the front and rear bumpers.
- If you don’t know where to place the jack, look for a flat metal area along the weld running under the door. There may be a slot to match the top shape of the jack, a cut in the plastic flap with exposed metal, or a solid block of plastic attached to the frame. It may even have the word “size” written on it underneath the chassis.
Place the click below the point to click. Slide the click below the location you just found. You don’t need to align the jack perfectly because it can even slide it back and forth until it hits the car.
- Make sure the jack is set to the correct orientation. If there is no warning “this face up” on the jack, you can find the instructions in the user manual. Usually the jack will have a wide, flat base, and a small upward swing arm with “teeth” at the edge pointing into the body of the vehicle.
Lift up. How to raise the jack will depend on your jack type (see below). Since the jack’s top swing arm is located near the underside of the vehicle, you’ll need to make last-minute adjustments so that the jack aligns with the jack placement.
- A-size: This type of jack looks like two horizontal metal plates with a diamond-shaped mechanism in the middle. One side of the jack has a metal hole that connects to the actuator by means of a screw. Thread the metal rod through the hole and rotate to pull the two sides of the jack in, while pushing the top and bottom of the jack apart. Then the car will be raised.
- Hydraulic jack: This device is also known as floor jack. It looks like metal bases and has a part that looks like a lever stretched out to the side. There is an opening to thread the metal rod into one side. Push the bar up and down in a steady rhythm to inject hydraulic fluid into the cylinder and raise the jack.
Lift the vehicle off the ground. When the jack makes contact with the underside of the car, you will begin to feel the weight. Continue to raise the jack until you see a corner of the vehicle leaving the ground. You can stop when the space is wide enough to work. For common tasks like changing tires, you only need to jack up the car a few centimeters.
- Notice if the car makes a sound or moves while jacking. You may hear a faint sound or ‘thump’ when the trigger is shifted slightly. If this happens, check if the jack has slipped out of position before continuing.
- Always keep every part of your body away from under the vehicle while jacking up. Although rare, serious injury or death can result if the vehicle skids off the jack. [6] X Research Sources
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If you need to work under the car, use the die. Jobs that require placing any body part under the vehicle require the use of a dead body. It is a sturdy base and has a larger contact area than a conventional jack. It’s not safe to work under a car without a dead body . The normal way to use the death squad will be as follows:
- Slide two dead pods under the car near where the jack is active. Align the rod with the weld line or jacking point. Raise the dead bat until it almost touches the underside of the vehicle. Lower the jack slowly and carefully until the truck “touches” the vehicle.
- If you’re not working under the car (for example, changing tires) there’s no need to use a deadhead. Be careful not to leave any body parts under the vehicle while working.
Lower the car after work is done. At this point, you’re ready to do whatever needs to be done with the vehicle. When you’re done, slowly lower the bike to the ground, take out the jack, and put it away. If you use the dead squire, you must first lift the rickshaw from the swarm , then pull the sling out and lower it down. The way to downgrade is as follows:
- Size A: Slide the iron bar into the screw hole and rotate it in the opposite direction from when lifting the jack.
- Hydraulic jack: Open the relief valve and let the liquid escape from the hydraulic cylinder, then the swing arm will lower. The valve is usually a small screw attached to the lever. Remember to open the valve slowly to avoid causing the vehicle to fall suddenly.
Advice
- Remember, the jack is only used to raise the vehicle — not to hold it in place while you work underneath. If you have to put any body parts under the car, use the death squad.”
- If you need to change a tire, loosen the wheel bolt before jacking up the car. Failure to do so will cause the wheel to spin when you try to open the bolt and make the job much harder.
- Check the stability of the jack or deadhead before getting under the vehicle or removing a stuck wheel, and gently push the vehicle with your body weight when it is jacked up. If the vehicle is likely to skid, it will slide now instead of later.
- Keep the jack and wheel cleats in the trunk so they’re always available when you need them.
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wikiHow is a “wiki” site, which means that many of the articles here are written by multiple authors. To create this article, 9 people, some of whom are anonymous, have edited and improved the article over time.
This article has been viewed 23,621 times.
Car repair work often requires lifting the car, from changing brake pads to patching tires. You will have to use a jack to lift the car, unless you have large hydraulic lifting equipment like at a garage. The jack is generally easy to use, but care must be taken to ensure safety, especially when you are working under the vehicle. Luckily, you just need to follow a few common sense rules.
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