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What Causes Severe Heating of the Front Wheel Hub in a Car?

2 Answers

SkylarDella

07/29/25 2:17pm

Introduction to the causes of severe heating in the front wheel hub of a car: 1. Over-tightened or abnormally worn bearings: The wheel hub is located at the innermost part of the brake drum, specifically the axle head where the bearing is installed upon disassembly. Overheating of the wheel hub (axle head) is usually caused by bearings that are too tightly fitted or insufficient lubrication. Excessive heat can cause the lubricating grease inside to melt and leak, affecting braking performance, and in severe cases, it can burn out the bearings. 2. Brake drag or drum rubbing: The temperature of the brake drum is influenced by environmental temperature, driving speed, frequency of braking, vehicle weight, and road conditions. A few brake applications can raise the temperature to 100-200 degrees, and in heavy trucks going downhill, it can even exceed 300 degrees. If the brake drum is overheating, you can jack up the front wheel of the car and rotate the tire to check for any rubbing. Then, rotate the tire and apply the brakes a few times to see if the brakes return properly or get stuck.

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Reyn

08/13/25 6:32am

Severe overheating of the front wheel hubs is usually related to the braking system. I have encountered many such cases during my years of driving. Excessive friction between the brake pads and brake discs generates significant heat, which transfers to the hubs and causes overheating. This commonly occurs when the brake pads are stuck or the brake discs are warped. Additionally, worn or insufficiently lubricated wheel hub bearings can also generate heat through friction, especially during continuous downhill driving or frequent braking. I have also noticed that low tire pressure or imbalance can increase rolling resistance, indirectly making hub overheating more noticeable. To address this issue, it is recommended to stop the vehicle immediately, check if the hub temperature is excessively high, and visit a professional workshop as soon as possible to inspect the brake pad thickness and bearing lubrication condition. Regular maintenance of the braking system is crucial to prevent minor issues from escalating into major faults that could compromise driving safety.

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