What Are Trunk Struts and Why Replace Them?
Trunk struts replacement involves swapping out the worn-out gas-filled cylinders that assist in lifting and holding open your vehicle's trunk lid or rear hatch. These components, often called lift supports or gas springs, contain pressurized gas and hydraulic fluid to counteract the weight of the panel, preventing it from falling unexpectedly. Understanding this mechanism is fundamental to maintaining vehicle safety and convenience.
- Worn trunk struts fail to hold the hatch open.
- They use gas pressure and hydraulics to lift and support.
- Replacement restores safety and ease of access.
- Inspect struts for leaks, rust, or weak performance.
When your trunk lid or hatch begins to droop, slams shut unexpectedly, or requires significant manual effort to stay open, the lift supports have likely failed. This isn't merely an inconvenience; it's a safety hazard. A falling hatch can cause serious injury. Common culprits include age, environmental exposure, and wear on the seals, leading to gas leaks or mechanical failure. Our analysis indicates that most vehicle owners can tackle this repair themselves.
Signs of Failing Trunk Struts
Several indicators point to the need for trunk struts replacement. The most obvious is the inability of the trunk or hatch to stay open on its own. You might also notice a slow, jerky movement as it opens, or it might require a strong push to lift. Look for visible signs of damage: oil leaks around the strut body (indicating seal failure) or significant rust and corrosion on the piston rod or mounting points. The primary consideration involves diagnosing the extent of the failure before proceeding.
This mechanism is critical for preventing accidental closure.
Understanding the Components
A trunk strut assembly consists of a sealed cylinder containing compressed gas (typically nitrogen) and a piston rod. When you open the trunk, the gas expands, pushing the piston rod out and lifting the hatch. As it closes, the gas is compressed, and the hydraulic fluid controls the speed of descent. Understanding this principle is fundamental. For instance, a mini 14 accu strut might have different specifications than a gas strut for 1967 c10 tailgate, requiring precise selection.
How to Replace Trunk Struts: A Step-by-Step Guide
Replacing trunk struts is a feasible DIY project that can be completed with basic tools. The process involves safely supporting the hatch, removing the old struts, and installing the new ones. It is imperative to acknowledge the importance of safety during this procedure.
Preparation and Safety First
Before starting, gather your new, correctly specified trunk struts. Ensure they match your vehicle's make, model, and year. You will need a Phillips head screwdriver, a socket set or wrenches, and safety glasses. Crucially, secure the hatch in the open position using sturdy props, such as adjustable jack stands or strong wooden dowels, placed strategically to bear the load. Never rely solely on the failing struts or your body to hold the hatch. This is a common mistake that leads to injury.
Prop the hatch securely before attempting to remove any hardware. Use multiple support points if possible.
Removing the Old Struts
Locate the mounting points for the existing struts at both the body and the hatch. They are usually secured by bolts or retaining clips. Some may have a small tab that needs to be depressed. Carefully remove the fasteners for one strut at a time. As you loosen the final fastener, be prepared for the strut to detach. It might be under some tension. Once removed, inspect the mounting brackets for any corrosion or damage that might require attention, such as a garage door reinforcement strut might need specific mounting.
Installing the New Struts
Align the new strut with the mounting points. It's often easier to attach one end first, then flex the strut to align with the other. Ensure the piston rod is retracted when attaching it to the lower (body) mount and extended when attaching to the upper (hatch) mount, or vice versa, depending on the vehicle design. Secure the new strut with the original hardware or new fasteners if provided. Repeat the process for the other side. Such precision is paramount for proper function.
Testing and Final Checks
Once both new struts are installed and secured, remove your props carefully. Gently lift the hatch to test the new supports. It should open smoothly and hold its position firmly without any signs of sagging. Cycle the hatch a few times to ensure it operates correctly. If you encounter any issues, re-check the mounting hardware for tightness. This mechanism is critical for your convenience.
The key to a successful trunk strut replacement lies in meticulous preparation and using the exact correct replacement part for your vehicle.
Common Issues and Troubleshooting
If new struts don't hold, verify you purchased the correct part number; variations exist even within the same model year. Ensure all mounting hardware is fully tightened. Issues with universal strut clamps or strut angle bracket installations can also cause problems if non-standard parts are used. Lesjofors gas struts rear specifications, for example, must match OEM requirements.
When to Call a Professional
While trunk struts replacement is a common DIY task, there are situations where professional assistance is advisable. If you encounter heavily rusted or seized mounting bolts that refuse to budge without extreme force, attempting to remove them could damage the vehicle's body panel or frame. Similarly, if the mounting brackets themselves are damaged or corroded, they may require welding or fabrication, which is beyond basic tool capabilities.
Complex Vehicle Systems
Some modern vehicles integrate lift supports with electronic systems, such as power liftgate functions or proximity sensors. Replacing struts in these vehicles might require recalibration or specialized tools to avoid interfering with these systems. If your vehicle has such features, it's often safer and more efficient to let a professional handle the trunk struts replacement. This ensures all integrated electronics continue to function as intended.
Lack of Confidence or Tools
Ultimately, if you lack the confidence, proper tools, or sufficient time to complete the job safely and correctly, consulting a qualified mechanic is the best course of action. The cost of professional service is often less than the potential cost of repairing damage caused by an inexperienced DIY attempt. For specialized applications like a full strut turkey mount, professional installation is often recommended due to precision requirements.