What Causes Car Body Shaking at 120 km/h?
2 Answers
The reasons for car body shaking at 120 km/h include excessive engine carbon deposits or component aging, as well as ignition system failures. Pre-departure vehicle inspection: Before setting off each day, conduct a comprehensive vehicle check, including checking for oil or water leaks, measuring tire pressure to ensure it's appropriate, inspecting engine oil condition to verify its color is normal and the oil level is correct. Safe driving: Use seat belts correctly - their protective effect during violent collisions is no less than that of airbags. Avoid fatigue driving and take breaks every 2 hours. Traffic rule compliance: Especially on highways, don't speed. Speeding not only risks traffic police penalties but more importantly is unsafe.
My car starts to shake when it reaches 120 km/h, and I've encountered this issue several times. The main cause is usually related to the tires. The most common reason is improper wheel balancing, especially after changing tires or patching them without rebalancing. At high speeds, it can shake like a massage chair. Other causes include uneven tire wear, inconsistent tire pressure on both sides, or even slight wheel rim deformation, all of which can lead to shaking. Once, after changing tires, I noticed shaking at high speeds, and it was only resolved after rebalancing and a four-wheel alignment. Additionally, bulging or aging/deformed tires are worth checking, especially for cars that frequently drive on rough roads. If none of these are the issue, then it might be necessary to inspect the suspension system.
