Learning where to put jack stands under your car is one of the most critical safety skills for any DIY mechanic. Getting this wrong can lead to catastrophic failure, causing serious injury or damage to your vehicle. Once the car is lifted, jack stands should be positioned under secure structural points to provide stable support. This guide will walk you through every step, from preparation to placement, ensuring you can work under your vehicle with complete confidence.
We will cover the specific lift points for different vehicle types, common mistakes to avoid, and the essential tools you need. You’ll learn how to identify the strong, reinforced areas of your car’s frame designed to hold its weight. Let’s get started with the foundational knowledge you need before you even pick up a jack.
Where To Put Jack Stands Under Car
The core principle is simple: you must place jack stands on solid, manufacturer-approved structural points. These are typically different from the spots you use for the initial lift with a floor jack. Using the wrong points, like body panels, suspension components, or the oil pan, can punch through metal and cause the car to fall.
Your primary resources are your vehicle’s owner’s manual and the factory service manual. They contain diagrams specifying the exact lift and support points. If you don’t have these, the general rules outlined here will guide you to the correct locations.
Essential Safety Gear And Tools
Before you begin, gather the right equipment. Using improper tools is a major safety risk.
- Jack Stands: Use a pair with a weight rating exceeding your vehicle’s gross weight. A minimum of 2 tons per stand is a good baseline for most cars.
- Floor Jack: A hydraulic floor jack is far safer and more stable than the emergency scissor jack that came with your car.
- Wheel Chocks: These blocks go behind the wheels remaining on the ground to prevent the car from rolling.
- Solid, Level Surface: Only work on concrete or similarly hard, flat ground. Never jack a car on dirt, gravel, or asphalt on a hot day.
- Safety Glasses & Gloves: Protect your eyes from falling debris and your hands from sharp edges.
Step-By-Step Lifting And Support Procedure
Follow this sequence every single time you lift your vehicle. Do not rush or skip steps.
- Park and Prepare: Park on a level surface, put the car in Park (or first gear for manual), and engage the parking brake firmly. Chock the wheels that will remain on the ground. For example, if lifting the front, chock both rear wheels.
- Locate Front Lift Points: For the initial lift with the floor jack, find the central front lift point. This is often a reinforced crossmember or a marked spot on the subframe behind the engine. Consult your manual.
- Lift the Vehicle: Position the floor jack head securely under the lift point. Pump the jack handle smoothly until the wheels are a few inches off the ground—just high enough to fit the stands.
- Position the Jack Stands: This is the crucial step. Slide the jack stands under the vehicle’s designated support points, which are usually on the frame rails or subframe, just inboard of the wheels. Ensure the stand’s saddle is fully contacting the metal.
- Lower Onto Stands: Slowly lower the floor jack so the vehicle’s weight settles onto the jack stands. You should hear a firm “clunk” as it seats. Gently rock the car (do not shake violently) to test stability. It should not move or wobble.
- Repeat for the Rear: If lifting the entire car, lower the front onto stands, then move the floor jack to the rear differential or central rear lift point to repeat the process for the back.
- Final Safety Check: Before going under, give the car a solid push and pull at a sturdy corner. If anything shifts, lift it slightly and reposition the stands. Leave the floor jack positioned under a secure point as a secondary safety backup, but not supporting weight.
Identifying Correct Support Points By Vehicle Type
Different car designs have different strong points. Here’s how to find them.
Unibody Vehicles (Most Modern Cars and SUVs)
Unibody cars lack a full frame, so you must use the reinforced pinch welds or dedicated frame rails. The pinch weld is the vertical seam running along the side of the car, just inside the rocker panel. Many manufacturers mark it with a notch or arrow.
- Using Pinch Welds: Jack stand saddles must have a groove or slot to cradle the weld without crushing it. Never place the stand’s flat surface directly on the pinch weld, as it can bend.
- Alternative Points: Look for solid subframe connection points, front crossmembers, or reinforced sections of the frame rail indicated in your manual.
Body-On-Frame Vehicles (Trucks, Older SUVs)
These vehicles have a heavy, full-length frame, making support points more obvious. The frame rails are the long, thick beams running under the length of the vehicle.
- Place jack stands as close to a suspension mounting point or a crossmember as possible, as these are the strongest sections. Avoid placing them on the very ends of the frame rails, which can be weaker.
Specific Points For Common Repairs
Where you place the stands depends on the work you’re doing.
- Oil Change: Usually only the front needs lifting. Place stands under the front frame rails or subframe.
- Brake or Tire Rotation: You may lift just one corner at a time. Use the dedicated lift point near that wheel, often on the frame rail or control arm mounting point.
- Exhaust Work: You’ll likely need the entire car raised. Support the vehicle at four points: front frame rails and rear frame rails or axle housing (for solid axles).
Locations You Must Avoid
Knowing where not to place a jack stand is just as important. These areas cannot support the vehicle’s weight and will fail.
- The Floor Pan or Body Panels: This thin sheet metal will crumple instantly.
- Suspension Components: Control arms, sway bars, and tie rods are not designed for vertical support.
- The Engine Oil Pan or Transmission Pan: These are made of cast aluminum or thin steel and will crack.
- The Differential Housing (on independent rear suspensions): Only the central pumpkin on a solid axle is usually safe.
- Exhaust Pipes and Catalytic Converters: They will crush and could start a fire.
- Any Plastic Underbody Covers: These offer zero support.
Troubleshooting Common Jack Stand Issues
Even with good intentions, problems can arise. Here’s how to handle them.
- Stand Sinks or Tilts on Asphalt: The surface is too soft. You must move the vehicle to concrete or use large, solid wood planks (at least 2″ thick) under the stands to distribute the weight.
- Cannot Find Clear Support Points: If undercoating or rust obscures the area, carefully clean it with a wire brush to identify the structure. Do not guess.
- Vehicle is Too Low for Jack or Stands: Drive the front wheels onto low-profile ramps first to gain initial clearance for your floor jack.
- Uneven Weight Distribution: If the project requires pushing or pulling, place the stands slightly closer to that end of the car for better balance.
Long-Term Support And Maintenance Tips
If the car will be on stands for more than a day, take extra precautions. Release tension on the suspension by supporting the frame, not the control arms, if possible. This prevents the shocks and springs from being held at full extension for weeks. Periodically check the stands for settling, especially on slightly imperfect surfaces. Store your jack stands in a dry place to prevent rust that could compromise their integrity. A quick wipe-down with an oily rag after use will help.
Final Safety Checks Before Working
Never skip your final inspection. Visually confirm all four stands are vertical and the locking pins are fully engaged. Place the removed wheels and tires under the rocker panels as an additional safety barrier. This can save your life if the stands fail. Keep your torso and legs from being directly under major components like the engine or transmission during the initial phases of your work. Inform someone that you are working under the car, and avoid working alone if possible.
Frequently Asked Questions
Can I Use Jack Stands On The Side Pinch Welds?
Yes, but only if your jack stands have a suitable groove or saddle designed for pinch welds. Many modern stands include a pinch weld notch. Never use a flat-top stand on a pinch weld, as it will likely damage the weld and become unstable.
How Many Jack Stands Do I Need To Lift A Car?
You need at least two jack stands. To lift the entire car safely off all four wheels, you need four jack stands. Supporting a car with only one stand in the center is extremely dangerous and should never be attempted.
Where Are The Jack Points On A Unibody Car?
The primary jack points are typically the reinforced pinch welds along the sides, often marked by small notches or arrows. Secondary support points for stands include the front subframe, rear crossmember, or designated spots on the frame rails, as shown in your owner’s manual.
Is It Safe To Leave A Car On Jack Stands For A Month?
While mechanically safe if done correctly on proper points, it’s not ideal. The suspension components may stress from being at full droop, and environmental factors come into play. For very long-term storage, using dedicated car support blocks on the frame rails is a more stable option than jack stands.
What Are Alternatives To Jack Stands For Car Support?
For ultimate safety in a home garage, solid concrete or heavy-duty steel wheel ramps are excellent for work that doesn’t require wheel removal. For major repairs, dedicated vehicle support posts or solid oak blocks are sometimes used by professionals, but properly rated jack stands remain the standard and most versatile choice for DIYers.