When and Why to Replace Your Lift Gate Struts
Replacing worn lift gate struts is essential when your vehicle's rear hatch or liftgate begins to droop, fails to stay open, or slams shut unexpectedly. This critical maintenance ensures your safety and prevents damage to the hatch itself or anything beneath it. Understanding the signs and the mechanics behind these components is the first step to a successful DIY replacement.
- Worn struts cause liftgates to sag or close unexpectedly.
- Replacement ensures hatch security and prevents accidental closure.
- Safety is paramount; always support the liftgate during replacement.
- New struts restore smooth operation and ease of use.
Lift gate struts, often called gas springs or hatch supports, are sealed cylinders containing compressed gas and a small amount of oil. This internal pressure is what provides the force to assist you in lifting and holding open your vehicle's liftgate or tailgate. Over time, the seals can degrade, leading to gas leakage and a loss of lifting power. This is often evident by the hatch slowly descending on its own, especially in colder weather, or requiring significant force to open initially.
Recognizing Failing Struts
The most common indicator is the liftgate no longer holding its position. It might feel unusually heavy to lift, or it might drift downward after you've opened it. You may also notice a lack of resistance when manually pushing the liftgate down. If you've ever had a lift gate suddenly drop on you, the struts are definitely past their prime and pose a significant hazard. Ignoring these symptoms can lead to injury or costly damage.
Such precision is paramount for vehicle safety systems.
Choosing the Right Replacement Struts
Selecting the correct replacement struts is crucial for proper function and safety. Most struts are vehicle-specific, meaning they are designed with a particular length, extension force (measured in Newtons), and mounting point geometry for a given make, model, and year. Referencing your vehicle's owner's manual or consulting with an auto parts specialist can help you identify the exact part number. Universal strut clamps or brackets are generally not suitable for direct liftgate applications, as they can compromise the intended fit and force distribution. Always opt for direct-fit replacements, which are often available from reputable brands like Lesjöfors gas struts rear specifications or other specialized manufacturers.
Confirm the exact length of your old struts when fully extended and compressed, as well as the mounting hole diameter, to ensure a perfect match for your specific vehicle.
Understanding Strut Mechanics
The core principle behind a lift gate strut is simple physics: compressed gas exerts outward force. When you open the liftgate, you overcome the initial static friction and the strut's resting pressure. As it extends, the gas inside pushes outward, assisting the lift. This mechanism is critical for the smooth, effortless operation you expect. Our analysis indicates that even a slight loss of gas significantly impacts performance.
Step-by-Step Guide to Replacing Lift Gate Struts
How to Replace Lift Gate Struts: The Process
Replacing lift gate struts is a manageable DIY project, but it requires careful attention to safety. The primary consideration involves ensuring the liftgate is securely supported throughout the process to prevent it from falling unexpectedly. This procedure is generally straightforward, but having the right tools and following these steps meticulously will ensure success.
Gather Your Tools and Safety Gear
Before starting, collect all necessary items. You will typically need a flathead screwdriver or a small pry tool, a socket wrench set (often 10mm or 13mm), work gloves, and safety glasses. Most importantly, you need a way to prop open the liftgate securely. Two adjustable jack stands or sturdy wooden dowels placed strategically under the liftgate are ideal. Never rely solely on your helper's strength or prop the liftgate with unstable objects.
This mechanism is critical for preventing accidents.
Support the Lift Gate
This is the most critical safety step. Open the liftgate as far as it will go. Carefully position your jack stands or dowels under the reinforced edge of the liftgate, ensuring they are stable and provide solid support. Lower the liftgate gently onto the supports. Double-check that the support is secure before proceeding. You should be able to gently push on the liftgate and have it remain firmly in place without movement.
Remove the Old Struts
Locate the mounting points of the old struts at both the body and the liftgate. Each mounting point usually consists of a metal bracket with a ball stud or a pin. There's typically a clip or retainer that needs to be pried off with a flathead screwdriver or pry tool. Once the clip is removed, the strut can be carefully pulled off the stud or bracket. Work one strut at a time, starting with the one on the passenger side or driver's side, to maintain some structural integrity. This component selection is fundamental.
When prying off the retainer clips, apply gentle pressure to avoid damaging the ball stud or the surrounding metal of the liftgate or body panel.
Install the New Struts
Align the new strut with the mounting point. It should slide easily onto the ball stud or bracket. Once in place, re-install the retainer clip to secure the strut. Ensure it clicks firmly into position. Repeat the process for the other mounting point on the same strut, and then move to the second strut. You'll need to apply firm pressure to seat the new strut onto the studs. Such precision is paramount.
Test and Finalize
Once both new struts are installed and secured, carefully remove the jack stands or dowels supporting the liftgate. Slowly open and close the liftgate a few times to ensure it operates smoothly and stays open on its own. If the liftgate feels stiff or doesn't open/close correctly, double-check that all mounting clips are fully engaged and that the struts are the correct ones for your vehicle. Our experts confirm this is crucial.
Troubleshooting Common Issues After Replacement
What happens if your lift gate still feels heavy or doesn't quite function right after installing new struts? Most issues stem from a few common causes that are easily rectified. Understanding these potential pitfalls can save you time and frustration, ensuring your liftgate operates perfectly.
Lift Gate Feels Too Heavy or Won't Stay Open
This often indicates that the new struts are not strong enough or are the wrong length. Double-check the part numbers against your vehicle's specifications. Sometimes, especially on older vehicles, the liftgate hinges can wear out, requiring more force than even new struts can provide. If the liftgate feels extremely difficult to lift and the struts are confirmed correct, investigate hinge wear. A 1967 C10 tailgate might have different wear patterns than a modern SUV, for instance.
Lift Gate Closes Too Quickly or Slams Shut
This is a critical safety issue and usually means the new struts are too powerful for the application, or they haven't been fully seated. Ensure the retainer clips are properly installed on both ends of each strut. If the clips are secure and the struts are the correct specification, the liftgate might have aftermarket modifications or accessories (like spoilers or roof racks) that add weight, requiring stronger struts than standard. You might also need to ensure your struts are mounted at the correct strut angle bracket position if any adjustment was needed.
Properly installed, new lift gate struts should make your hatch feel nearly weightless when opening.
Struts Leaking or Making Noise
A new strut should not leak oil or gas, nor should it make unusual noises. If a new strut is noisy, it might be misaligned or binding. Ensure it's installed straight and not under any torsional stress. If a strut shows signs of leakage shortly after installation, it's likely a manufacturing defect. This is when you'd utilize the warranty and replace the faulty unit. For highly specific applications, like a full strut turkey mount which uses a different mechanism, these issues would be addressed differently but for vehicle liftgates, these are the primary concerns.
Apply a thin layer of silicone grease to the ball studs before attaching the new struts to ensure a smoother, longer-lasting connection and prevent future binding.
The Bottom Line on Strut Maintenance
Regularly inspecting your lift gate struts is a simple preventative measure. Look for signs of wear, leakage, or reduced lifting power. Addressing these issues promptly, often with a straightforward replacement like the one outlined, keeps your vehicle functional and safe. Understanding the mechanics, choosing the right parts, and following a safe installation process are key to success.