Knowing how to use a car jack is a fundamental skill for any driver. Whether you’re facing a flat tire or need to perform basic maintenance, doing it correctly is crucial for your safety. Safely raising your vehicle with a jack means first locating the manufacturer’s specified lift points on the frame. This guide will walk you through every step, ensuring you can handle this task with confidence and avoid common, dangerous mistakes.
How To Use A Car Jack
Using a car jack properly involves more than just lifting a corner of your vehicle. It requires preparation, the right tools, and a strict adherence to safety. This section covers the core principles and steps you must follow. The process can be broken down into three main phases: preparation and safety, the step-by-step lifting procedure, and lowering the vehicle safely. Never rush this process, as taking shortcuts can lead to vehicle damage or serious injury.
Essential Tools And Safety Gear You Will Need
Before you even think about lifting your car, gather all the necessary equipment. Your vehicle’s factory jack kit is a good start, but it’s often minimal. For greater safety and stability, consider investing in a few additional items.
- The Car Jack: This could be the scissor jack or bottle jack that came with your car, or a more robust hydraulic floor jack you’ve purchased separately.
- Jack Stands (Non-Negotiable): These are the most critical safety item. Never work under a vehicle supported only by a jack. You need at least two sturdy jack stands rated for your vehicle’s weight.
- Wheel Chocks: These blocks wedge against your tires to prevent the car from rolling. Use them on the wheels that will remain on the ground.
- Lug Wrench: For loosening and tightening the lug nuts on your wheel.
- Flashlight: To help you clearly see the lift points and your work area, especially in low light.
- Work Gloves: To protect your hands from sharp edges and grease.
- A Flat, Solid Surface: Always jack your car on level, paved ground like concrete or asphalt. Never attempt this on dirt, gravel, or a slope.
Preparing Your Vehicle And Work Area
Proper preparation sets the stage for a safe and successful job. Do not skip these initial steps, as they are designed to immobilize the vehicle and protect you.
- Park on a Level, Solid Surface: Find a flat area away from traffic. Turn off the engine and engage the parking brake fully.
- Chock the Wheels: Place wheel chocks snugly against the tires on the end of the car opposite the one you’re lifting. For example, if you’re lifting the front, chock the rear wheels.
- Gather Your Tools: Have your jack, jack stands, lug wrench, and other gear within arm’s reach before you start.
- Loosen the Lug Nuts (For Tire Work): If you’re changing a tire, slightly loosen the lug nuts on the wheel you’ll be removing before you lift the car. This uses the ground’s friction to keep the wheel from spinning.
- Locate the Correct Jack Point: Consult your owner’s manual to find the designated lift points for your specific vehicle. These are usually reinforced metal sections on the frame or dedicated tabs behind the front wheels or ahead of the rear wheels.
Why Using the Correct Jack Point Is Critical
Using the wrong point to lift your car can cause catastrophic damage. The body panels, side skirts, and exhaust components are not designed to hold the vehicle’s weight. Lifting from these areas can crush them, leading to expensive repairs. The manufacturer’s specified points are engineered to handle the stress, distributing the weight safely and preventing the jack from slipping.
Step-by-Step Guide To Lifting Your Vehicle
Now that your workspace is prepared, you can begin the actual lifting process. Follow these steps in order, and work slowly and deliberately.
- Position the Jack: Carefully place the jack head directly under the correct lift point. Ensure it is centered and making solid contact. For scissor jacks, the groove or cup should engage with the vehicle’s pinch weld or tab securely.
- Begin Lifting: Start pumping the jack handle or turning the crank. Lift slowly and smoothly, watching the vehicle and the jack’s position as it rises. Stop immediately if you hear any strange noises or see the jack slipping.
- Lift to the Desired Height: Raise the vehicle just high enough to acomplish your task. For a tire change, you only need the flat tire to clear the ground by an inch or two. Do not lift higher than necessary.
- Place Jack Stands (IMPERATIVE): Once the car is at a workable height, slide your jack stands under a secure, load-bearing part of the vehicle’s frame. Never use suspension components. Adjust the stands to the correct height and lower the vehicle onto them slowly until the weight is fully supported by the stands. The jack should still be in place but no longer holding the full weight.
- Perform a Stability Test: Gently rock the car with your hands to check that it is stable on the jack stands. It should not wobble or shift. If it does, lower it and reposition the stands.
Lowering Your Vehicle Safely
Lowering the car is just as important as lifting it. A haphazard lowering can knock over jack stands or cause the vehicle to fall.
- Clear the Area: Make sure all tools, the flat tire, and your feet are out from under the vehicle.
- Raise the Vehicle Slightly: Use the jack to lift the car just enough to take the pressure off the jack stands so you can remove them easily.
- Remove the Jack Stands: Slide the jack stands out from under the vehicle and set them safely aside.
- Lower Slowly and Completely: Gradually release the hydraulic valve or turn the jack crank to lower the vehicle straight down. Do this in a slow, controlled manner until all wheels are firmly on the ground.
- Final Tightening (For Tires): If you installed a wheel, now is the time to fully tighten the lug nuts in a star or crisscross pattern with your wrench. Remove the wheel chocks.
Common Types Of Car Jacks And Their Use
Not all jacks work the same way. Understanding the type you have will help you operate it correctly.
Scissor Jacks
This is the compact, X-shaped jack that comes with most cars. It’s operated by turning a long crank with a lug wrench. While portable and fine for emergency tire changes, it has a narrow base and can be unstable. Always use it on perfectly flat ground and pair it with jack stands for any work beyond a quick wheel swap.
Hydraulic Bottle Jacks
These are cylindrical jacks that use hydraulic fluid to lift. They have a greater weight capacity and lift range than scissor jacks but a relatively small base. They are excellent for SUVs and trucks but still require a very stable surface and jack stands for safety. Their small footprint means they can tip easier if not positioned perfectly.
Hydraulic Floor Jacks
This is the preferred jack for home garages. It has a large, stable base, rolls on wheels for easy positioning, and uses a long handle to pump hydraulic fluid. It lifts from a very low profile, making it easy to slide under sportscars. A quality floor jack is the safest and easiest manual jack to use, but it is bulky and not meant for roadside emergencies.
Critical Safety Mistakes To Avoid
Being aware of common errors can prevent accidents. Here are the most dangerous mistakes people make when using a car jack.
- Never Work Under a Jack-Supported Car: This cannot be overstated. Jacks are lifting devices, not support devices. They can fail due to mechanical fault, hydraulic leak, or shifting weight. Always use jack stands.
- Avoid Using Bricks, Wood Blocks, or Cinder Blocks: These materials can crack, split, or shift suddenly under a car’s weight. They are not a substitute for proper jack stands.
- Don’t Lift on an Incline or Soft Ground: Lifting on a slope or unstable surface like grass or gravel dramatically increases the risk of the vehicle rolling or the jack sinking and tipping.
- Do Not Exceed the Jack’s Weight Rating: Every jack has a maximum capacity. Know your vehicle’s curb weight (found in the manual or on the driver’s door jamb) and ensure your jack and stands are rated for more than that.
- Never Use the Jack on Body Panels: As mentioned, this leads to expensive, crumpled metal. Stick to the designated lift points.
Maintaining Your Car Jack And Jack Stands
Your safety equipment needs occasional checks to ensure it remains reliable. A faulty jack or rusty stand is a major hazard.
- Wipe down your jack after use to remove dirt and grime that can damage seals.
- Check hydraulic jacks for fluid leaks around the piston and release valve. If you see oil, it’s time for service or replacement.
- Inspect jack stands for cracks, heavy rust, or damage to the teeth and locking pins. A little surface rust is normal, but structural corrosion is dangerous.
- Store your equipment in a dry place to prevent corrosion. For scissor jacks in your trunk, make sure it’s secured so it doesn’t become a projectile in a collision.
- Test the mechanism ocasionally to ensure it operates smoothly without sticking or slipping.
FAQ: Answering Your Car Jack Questions
Here are answers to some of the most frequently asked questions about using car jacks.
Can I use a car jack without jack stands?
You should never work under a vehicle supported only by a jack. Jacks are for lifting, not for supporting. It is only acceptable to use just the jack for the few minutes it takes to swap a flat tire, and even then, you must keep your body out from under the vehicle. For any maintenance where you need to go underneath, jack stands are absolutely required.
Where is the jack point on my car?
The precise location varies by make and model. The most reliable source is your vehicle’s owner’s manual. Common locations include reinforced sections of the frame rail just behind the front wheels or ahead of the rear wheels, or along the vehicle’s central pinch weld (a thick seam under the doors). Many modern cars have small plastic markings or notches on the side skirts indicating where to place the jack.
What is the difference between a lift point and a jack point?
These terms are often used interchangably, but there can be a subtle difference. A “jack point” is typically the specific spot where you place the factory emergency jack, often on the pinch weld. A “lift point” may refer to a broader, reinforced area on the frame designed for a two-post automotive lift or floor jack pads. Always defer to your manual’s diagrams.
How do I jack up a car with a low front bumper?
Low-clearance vehicles can be a challenge. The best solution is to use a low-profile floor jack that can slide underneath. Alternatively, you can carefully drive the front wheels onto thin, sturdy ramps made for this purpose to gain enough clearance to slide a standard jack underneath the designated lift point. Never jack from the bumper or aerodynamic body kits.
Can I jack up the entire front or back of my car at once?
Yes, but it requires careful planning. You need to locate the central front or rear crossmember or differential (for rear-wheel drive) that is designed for this. You must use a jack with a sufficient weight rating and a long enough saddle. Once lifted, you must support both sides with a pair of jack stands placed under secure frame points. This is an advanced maneuver best performed with proper garage equipment.