Safe Car Jacking: A Step-by-Step Guide

Lifting your car safely is a fundamental skill for any DIY mechanic or car enthusiast. Whether you're changing a tyre, performing an oil change, or tackling other under-car maintenance, ensuring your vehicle is securely elevated is paramount. Using a car jack incorrectly can lead to significant damage to your vehicle or, more critically, serious personal injury. This comprehensive guide will walk you through the process of safely using a car jack at home, ensuring you can lift your car with confidence.

Understanding Car Jack Types

Before you begin, it's helpful to understand the different types of car jacks commonly available in the UK. Each has its own advantages and best-use scenarios.

Trolley Jacks (Floor Jacks)

Trolley jacks, also known as floor jacks, are the most popular choice for home use and professional garages alike. They are characterised by their stable, wheeled base and a long handle for leverage. The four wheels allow for easy manoeuvrability, and their robust design offers excellent stability when lifting. Trolley jacks typically operate using a hydraulic system, powered by a pump mechanism, making them efficient for lifting heavier loads. Many come with a built-in safety valve to prevent overloading.

Scissor Jacks

Scissor jacks are often supplied as standard equipment with vehicles, typically found stowed away in the boot or spare wheel compartment. Their compact size makes them ideal for emergency roadside repairs. Scissor jacks operate on a screw mechanism; you turn a handle or crank, which extends the arms of the jack, lifting the vehicle. While convenient for their portability, they generally offer less stability and require more physical effort than trolley jacks, especially for lifting heavier cars or for extended periods.

For the purposes of this guide, we will be demonstrating with a high-quality trolley jack, specifically a low-profile model from the Draper brand, which is particularly useful for lowered vehicles.

How to Safely Use a Car Jack

Follow these steps meticulously to ensure a safe and effective jacking process.

1. Locate a Safe Lifting Point

This is arguably the most crucial step. Your car's chassis has specific designated jacking points designed to bear the weight of the vehicle safely. These are usually reinforced areas on the car's frame. Referencing your vehicle's owner's manual is the best way to identify these exact locations. If you can't find them in the manual, look for reinforced metal edges or protrusions on the car's frame, typically near the wheels. Never attempt to lift your car from suspension components, the engine block, or the gearbox, as these are not designed to support the vehicle's full weight in this manner and can cause severe damage.

Visual Aid: Imagine a sturdy, reinforced pinch weld or a specific mounting bracket designed for jack placement. These are the areas you're looking for.

2. Position the Jack Correctly

Once you've identified the correct lifting point, position the jack directly underneath it. Ensure the jack's base is on a firm, level surface. The jack's lifting pad should be squarely aligned with the designated jacking point. Leave ample space behind the jack to operate the handle or pump. For trolley jacks, ensure the lifting arm is positioned to make contact with the jacking point without any obstruction.

Table: Jack Placement Considerations

3. Raise the Jack to Contact the Lifting Point

Begin to slowly operate the jack's pump or handle. The goal is to bring the jack's lifting pad into firm contact with the designated jacking point. Once contact is made, pause and visually confirm that the jack is still perfectly aligned. This is your last chance to make minor adjustments before significant weight is applied. Ensure the jack's base remains stable and hasn't shifted.

4. Raise the Vehicle to the Desired Height

With the jack in position and aligned, continue to pump or operate the handle. Lift the vehicle slowly and steadily. As the car rises, keep an eye on the jack to ensure it remains stable and vertical. Most trolley jacks have a locking mechanism on the handle to hold the lifting arm in place once the desired height is reached. If your jack has this feature, engage it for added security. Always use jack stands if you intend to work under the car for any extended period or if the task requires you to be fully beneath the vehicle. Jacks are designed for lifting, not for sustained support.

Important Note on Jack Stands: Never rely solely on the jack to support the vehicle while you are working underneath it. Once the car is at the desired height, carefully place sturdy jack stands under strong points of the chassis or frame, and then slowly lower the vehicle onto the stands. Ensure the stands are rated for the vehicle's weight and are positioned correctly.

5. Lower the Vehicle Safely

When you have completed your work, it's time to lower the car. This process should be done with the same care as lifting. Most jacks have a release valve, typically operated by twisting the handle or a dedicated release knob. Slowly and carefully twist the valve to release the hydraulic pressure (or unwind the screw mechanism for scissor jacks). This will cause the vehicle to descend gradually. Continue to lower it until the jack's lifting pad is completely free from the jacking point. Remove the jack and any jack stands.

Essential Safety Tips

Adhering to these safety tips can prevent accidents and ensure your car maintenance is carried out without incident:

• Engage the Handbrake and Gear: Always ensure the vehicle's handbrake is firmly applied and the car is in gear (or Park for automatic transmissions). This prevents the car from rolling while it's jacked up.
• Use Designated Lifting Points: Reiterate the importance of using only the manufacturer-specified jacking points.
• Level and Hard Surface: Never use a jack on soft ground, gravel, or uneven surfaces. A solid, level concrete or tarmac surface is essential for stability. If you must use it on a slightly less firm surface, place a large, sturdy piece of wood (like a thick plywood sheet) underneath the jack's base.
• Use Jack Stands: As mentioned, always use appropriately rated jack stands for any work that involves going underneath the vehicle.
• Keep Clear of the Vehicle: While lifting or lowering, ensure no part of your body is positioned under the vehicle.
• Check Jack Capacity: Ensure your jack has a sufficient weight capacity for your vehicle. This information is usually printed on the jack itself.
• Inspect the Jack: Before each use, check the jack for any signs of damage, leaks, or wear.

Lifting Lowered Cars

Lowered vehicles present a unique challenge when it comes to jacking. Cars lowered on sports suspension or coilovers often have very little ground clearance, making it difficult, if not impossible, to get a standard jack underneath the chassis.

Solutions for Lowered Cars:

• Low-Profile Jacks: Investing in a low-profile trolley jack is the most straightforward solution. These jacks have a much lower 'entry' height, allowing them to slide under vehicles with minimal clearance.
• Car Ramps: Driving your lowered car onto a set of car ramps first can significantly increase the ground clearance. This provides enough space to then position a standard jack underneath the vehicle.
• Wooden Blocks/Plywood: Similar to using plywood for surface stability, driving the car onto a few sturdy pieces of wood can also lift the chassis enough to allow a jack to be placed underneath. Ensure the wood is thick and strong enough not to crush.

Frequently Asked Questions (FAQs)

Q1: Can I use a jack on my driveway?

Yes, provided your driveway is made of a hard, level surface like concrete or tarmac and is free from obstructions. Avoid using it on loose gravel or uneven paving slabs.

Q2: How high should I lift my car?

Lift the car only as high as necessary to perform the required maintenance. Ensure there is enough clearance to safely place jack stands if needed.

Q3: What's the difference between a jack and a jack stand?

A jack is used to lift the vehicle, while a jack stand is used to support the vehicle once it has been lifted. Jacks are not designed for long-term support and can fail. Jack stands are crucial for safety when working under a car.

Q4: My car is lowered. Can I still use a jack?

Yes, but you will likely need a low-profile jack or to use ramps or sturdy blocks to gain enough clearance to position the jack correctly.

Conclusion

Using a car jack correctly is a vital skill for any car owner. By understanding the types of jacks available, meticulously following safety procedures, and taking appropriate precautions, particularly with lowered vehicles, you can confidently perform essential maintenance. Remember, safety should always be your number one priority. A good quality jack, careful placement, and the use of jack stands when necessary will ensure your car maintenance is a safe and successful endeavour.