Why is the trunk door hydraulic strut weak?

2 Answers
AdrianLee
07/25/25 11:38am
Weak trunk hydraulic struts are a malfunction phenomenon, most likely caused by ineffective support rods in the car's trunk. Here is some information about hydraulic struts: 1. Definition: Hydraulic struts use liquid as the working medium to transmit power. 2. Principle: The operation of hydraulic struts mainly relies on oil pressure, the gap between the tappet body and seat hole, the gap between the valve stem and tappet, and the check ball valve inside the tappet. 3. General specifications: Depending on the application, hydraulic struts come in many specifications. They are used in train seats, aircraft frames, medical beds, patient tables, toolboxes, and aquariums. Damping force and speed can be customized according to requirements.
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DiJasper
08/11/25 8:04pm
I've encountered the issue of the trunk door not staying up several times, and it's usually due to a few common problems. The hydraulic struts' internal seals can deteriorate and leak over time, reducing their sealing effectiveness and strength. If you frequently load heavy luggage into the trunk, the struts wear out faster. Another possibility is loose or rusted joints—last time, I sprayed some WD-40 lubricant, and it worked much better. In cold weather, the hydraulic fluid thickens, making the struts less responsive. This issue needs prompt attention; otherwise, the trunk door might suddenly drop, which is dangerous—damaging items is one thing, but injuring someone is serious. If all else fails, you can buy a matching new strut online and replace it yourself—there are plenty of installation videos available now, making it quite straightforward.
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