What Are Rear Hatch Struts and Why Replace Them?
Replacing rear hatch struts is a common maintenance task when your vehicle's liftgate or tailgate becomes difficult to open, stays partially open, or slams shut unexpectedly. These sealed, pressurized tubes, often filled with gas, provide the necessary force to lift and hold your hatch open. When they fail, they compromise both convenience and safety, making DIY replacement a practical solution.
- Struts are pressurized cylinders counterbalancing hatch weight.
- Failure causes a heavy, unsafe, or non-functional hatch.
- Replacement restores smooth operation and safety.
- DIY replacement saves money and time.
Understanding Strut Function
Each rear hatch strut, also known as a gas strut or lift support, contains pressurized gas (typically nitrogen) and a small amount of oil. This gas provides the lifting force. The oil acts as a lubricant and dampens the motion, preventing the hatch from slamming shut. Over time, the seals can degrade, leading to gas leakage, reduced pressure, and ultimately, a loss of lifting power. This is a common wear-and-tear item on vehicles with rear liftgates.
Signs of Failing Struts
The most obvious sign is a hatch that won't stay open by itself, requiring manual propping. You might also notice it feels significantly heavier to lift than it used to, or it might close suddenly and without warning. Sometimes, you'll see visible damage, like rust or fluid leaks, on the strut body or rod. Ignoring these signs can lead to accidental injury or damage to the hatch itself.
This mechanism is critical for safe vehicle access.
Why DIY Replacement Is Smart
Professional mechanics often charge for labor that can be avoided. The process to replace rear hatch struts is generally straightforward, requiring only basic tools and about 30-60 minutes of your time per vehicle. It's a satisfying repair that directly addresses a common automotive nuisance, restoring a key function to your car without significant expense. The primary consideration involves ensuring you have the correct replacement struts for your specific make and model.
Essential Tools and Preparation
How to Replace Rear Hatch Struts: Step-by-Step
Before you begin, gather your tools and prepare the workspace to ensure a smooth and safe replacement process. Having everything ready prevents interruptions and minimizes the time your vehicle's hatch is unsupported.
Gathering Your Supplies
You'll need the new rear hatch struts specifically designed for your vehicle's make, model, and year. Often, they are sold in pairs. Essential tools typically include a set of screwdrivers (flathead and Phillips), a socket set or wrenches (sizes will vary), and safety glasses. A utility knife might be needed to cut away any protective packaging. Many DIYers also find a step ladder useful for easier access.
Safety first: Always wear safety glasses to protect your eyes.
Securing and Supporting the Hatch
This is the most critical step for safety. Never attempt to replace struts with the hatch fully open and unsupported. For most vehicles, it's best to have a helper hold the hatch open, or use a sturdy prop rod (like a broom handle or a dedicated strut prop) to secure it firmly in place before you start removing the old struts. Ensure the prop is stable and won't slip. Understanding this principle is fundamental to a safe procedure.
Secure the hatch with a prop rod placed near the hinge point, and have a helper ready to assist, especially if working alone.
Removing Old Struts
Rear hatch struts are typically attached at both ends with ball sockets or mounting brackets, secured by clips or bolts. Locate the mounting points at the top and bottom of each strut. You may need to pry off a retaining clip with a screwdriver or loosen a bolt. Work on one strut at a time. Once disconnected from the hatch side, carefully detach it from the body side. Be prepared for the strut to extend slightly as pressure is released, but it should not spring free.
The primary consideration involves securing the hatch properly before any disassembly.
Installing New Struts and Final Checks
Mounting the New Struts
Align the new strut with the corresponding mounting point on the vehicle body. Most new struts come slightly compressed or ready to be attached. If the ball socket on the strut doesn't immediately seat onto the mounting stud, you may need to gently flex the hatch or body panel slightly, or use a helper to apply minimal pressure. Snap the ball socket firmly onto the stud or align the bolt and tighten securely. Repeat this process for the other end of the strut. Once one strut is fully installed, repeat the entire removal and installation process for the second strut.
Properly installed struts should feel snug and secure at both connection points.
Testing the New Struts
After both new struts are installed and all clips/bolts are tightened, slowly and carefully lower the hatch. You should feel a distinct difference in resistance. Then, lift the hatch again. It should now open smoothly and stay firmly in the open position without any assistance. Test it by gently pushing down on the open hatch to ensure it holds its weight securely. Such precision is paramount for safety.
If the hatch doesn't hold or feels uneven, double-check that both ends of each strut are fully seated and secured. Sometimes, a strut might be installed backward, though most are symmetrical.
Final Inspection and Maintenance
Perform a final visual inspection of the new struts and their mounting points. Ensure no tools or debris are left in the hatch area. Regularly clean around the strut shafts and check for any signs of damage or leakage, though new struts should provide years of reliable service. This DIY fix is a testament to simple, effective vehicle maintenance.