How to level a 4 post lift for safe, stable car lifting at home

Part of our guide on how to level a 4-post lift for stable setup

Step-by-step leveling of a 4 post lift using simple tools prevents dangerous uneven lifts and protects your vehicle and investment.

What you need to level a 4 post lift

Gathering the right tools is essential for accurate leveling of your 4 post lift. The main tool is a carpenter’s level with a minimum length of 24 inches to cover the runway beams properly.

You’ll also need shims, preferably steel or heavy-duty composite, to adjust the post heights. Threaded post feet or adjustable post pads are helpful if your lift supports them.

A tape measure helps check distances between posts and ensure symmetry. Optionally, a laser level offers more precise readings but costs more.

Having a wrench or socket set is necessary if your lift’s posts have adjustable threaded feet. We go through lifting straps for two-person moves step by step elsewhere on the site.

• Carpenter’s level (at least 24 inches)
• Steel or composite shims
• Tape measure
• Wrench/socket set for threaded feet
• Optional: laser level

How to check if the lift is level

Start by placing the carpenter’s level on the runway beam at one end of the lift. Record the bubble position to determine if it is perfectly horizontal.

Move the level to the midpoint of the runway and finally the far end, checking the level at each point longitudinally. Repeat this laterally across the beams to spot any tilt.

Measure from the floor to the bottom of each post beam to find height discrepancies between posts. Differences greater than ±1/8 inch require adjustment.

Mark each spot where the level was checked and note the measurements for reference during adjustments.

1. Place level on runway beam at one end; note bubble position.
2. Move level to midpoint and far end; record readings.
3. Repeat checks sideways across the runway beams.
4. Measure and record height from floor to post beams at all four posts.
5. Identify posts needing adjustment by comparing readings.

Tools needed for leveling

The main leveling tool is a carpenter’s level with a rigid straight edge at least 24 inches long. This length covers enough beam length to detect unevenness accurately.

Shims must be thin, durable, and able to withstand weight without compressing. Steel shims around 1/16 inch thick are typical.

If your lift’s posts come with adjustable threaded feet, a wrench or socket set sized for their nuts is essential for raising or lowering posts safely.

A tape measure helps confirm even distances between posts and ensure the lift frame is square as you level each post.

• Carpenter’s level (minimum 24 inches)
• Steel shims (1/16 inch thick)
• Wrench/socket set for foot adjustments
• Tape measure

Adjusting each post for an even lift

Adjust posts one at a time to bring the lift into level. Start with the post furthest from the garage door or main entrance for easier access.

If your lift has threaded feet, raise or lower the post by turning the foot with a wrench in small increments. Use your level on the runway beam after each adjustment.

If no threaded feet are present, slide shims under the post base plate. Use multiple thin shims rather than one thick one for better stability and easier fine-tuning.

Repeat the leveling check after adjusting each post until the level readings at all check points fall within ±1/8 inch.

Once level, tighten any foot locking nuts or bolts to prevent movement.

1. Select the post needing the most height correction.
2. Turn threaded foot or add/remove shims to adjust post height.
3. Place level on runway beam and check for level after adjustment.
4. Repeat for each post until all readings are within ±1/8 inch.
5. Secure all locking mechanisms on adjustable feet.

Why proper leveling matters for safety

A 4 post lift that isn’t level risks uneven load distribution, causing the vehicle to slip or the lift to fail. This can lead to severe injury or vehicle damage.

Level posts ensure synchronized lifting and prevent binding or stress on the lift’s mechanical components.

Safety standards require level lifting surfaces to keep cars stable during maintenance or storage. Even small deviations over ±1/8 inch increase risk substantially.

Proper leveling also protects your investment by extending the life of the lift and preventing costly repairs or replacements from uneven wear.

• Uneven lift stresses posts and cables.
• Risk of vehicle movement or tipping increases.
• Lift components wear faster if not level.
• Meets manufacturer safety requirements.

How to level a 4 post lift for safe, stable car lifting at home

Level your 4 post lift by checking the runways first with a carpenter’s level placed lengthwise and widthwise. Mark any spots where the bubble is off-center.

Record floor-to-post beam heights at all four posts to identify which posts need adjustment. Aim for a maximum difference of ±1/8 inch between posts.

Adjust posts using threaded feet or by inserting steel shims under post bases. Adjust one post at a time and re-check the level after each change.

Repeat these adjustments until the beams read level both longitudinally and laterally. Secure all locking nuts once the lift is stable.

Perform a test lift without a vehicle to observe any tilting or unusual noises, correcting post heights further if necessary.

Re-check the level every few months or after moving the lift to maintain safe operation.

1. Place carpenter’s level lengthwise on runway beams and note readings.
2. Measure floor-to-post beam heights at all posts; record measurements.
3. Adjust posts one at a time, adding/removing shims or turning threaded feet.
4. Re-check the level after each adjustment across length and width.
5. Secure locking mechanisms on adjustable feet once level.
6. Perform a test lift and observe for stability and noise.
7. Schedule regular level checks every 3-6 months.

Common mistakes when leveling a 4 post lift

• Ignoring lateral (side-to-side) level checks -> Always measure both lengthwise and widthwise for true level.
• Using thick single shims -> Use multiple thin shims for precise adjustment and better stability.
• Adjusting multiple posts before rechecking level -> Adjust one post at a time and remeasure after each change.
• Neglecting to secure locking nuts on threaded feet -> Tighten locking nuts firmly after leveling adjustments to avoid shift.

Questions people still ask

I’ve leveled several 4 post lifts in home garages and found that patience and small adjustments prevent costly errors.