The hood struts are failing if the hood won’t stay open, sinks or rises too quickly, or shows leaks or visible damage. In most cases, replacing them in pairs restores smooth, safe operation.
Hood struts, or gas springs, help lift and hold the hood open and can wear out from heat, age, and regular use. This guide outlines the telltale signs, how to test them safely, and what to consider when replacing them.
Common symptoms of failing hood struts
The following signs are commonly reported by drivers when a hood strut begins to fail.
- The hood drops or sags slowly after you lift it
- The hood rises abruptly or does not stay up on its own
- The hood requires extra effort to lift or to hold in the open position
- Visible leakage of oil or grease around the strut seals or on the cylinder
- The struts or mounting points show rust, bending, or other visible damage
- You hear creaking, popping, or hissing when opening or closing the hood
If several of these signs appear, the hood struts are likely worn and should be replaced, typically in pairs to maintain even support.
How to test hood struts safely
Use these checks to confirm whether the struts are failing without risking injury or damage.
- With the engine off, secure the hood in its fully open position using a prop or have an assistant hold it. If the hood is difficult to lift or tends to fall, the struts may be weak.
- Slowly lower the hood from its open position. If it sinks more quickly than expected, or refuses to stay up, the struts are likely worn.
- Inspect the seals for oil leaks and examine the rods for pitting, corrosion, or bent ends.
- Compare both sides; if one strut feels noticeably stiffer or weaker, replace the weaker unit (and ideally both sides).
- Check the mounting points for cracks, loose bolts, or misalignment of the hinges or brackets.
These tests help distinguish worn struts from hinge or latch issues. If you’re unsure, have a mechanic inspect the hood system before driving.
Replacement and maintenance considerations
When replacement is warranted, plan carefully to ensure proper fit and safety. Replacing hood struts in pairs is common practice for balanced operation.
DIY replacement vs. professional service
Some drivers with basic tools can swap out gas struts themselves, but you must support the hood securely and know how the mounting ends attach. If you’re uncomfortable, a shop can perform the replacement quickly and safely.
Choosing parts and installation tips
Match the extended length, mounting ends (ball socket vs stud), and load rating to your vehicle model. Verify both sides are identical to maintain balanced hood action. Use new hardware if required and follow the manufacturer’s torque specs.
- As a general rule, replace hood struts in pairs to avoid uneven opening and closing behavior.
- Prices vary by brand and vehicle, typically $20–60 per strut for aftermarket parts; labor adds to the total if you hire a shop.
After replacement, test the hood’s operation at various angles, listen for unusual noises, and ensure the hood stays open reliably and closes smoothly. Dispose of old struts according to local regulations.
Summary
In short, a bad hood strut will cause a hood that won’t stay open, sags or rises unexpectedly, shows leaks or damage, or makes unusual noises. Confirm with safe inspection and tests, then replace in pairs for balanced performance, whether you DIY or hire a professional. Regular checks help prevent accidental hood closures during maintenance.