How Much Engine Shaking is Considered Normal?

1 Answers
DelRachel
07/30/25 3:06am
There is no strict standard for engine shaking. It is quite normal for an engine to shake during startup or operation. However, if the shaking is noticeably severe, the cause should be investigated. The reasons for engine shaking are as follows: 1. Aging or loosening of engine mounts. Engine mounts are rubber blocks placed between the engine and the frame. Their purpose is to reduce vibration and cushion the engine's operation while also securing the engine in place. Once these mounts age or become loose, the engine's shaking will become abnormally noticeable. 2. Engine misfire. An engine misfire mainly refers to one or more cylinders not functioning properly, typically manifested as: intermittent exhaust flow from the car, severe shaking of the exhaust pipe, and a noticeable engine shake, sometimes accompanied by a sputtering sound. This is often related to ignition coil failure. 3. Engine carbon buildup issues. Carbon buildup here includes cylinder carbon buildup, throttle carbon buildup, spark plug carbon buildup, and intake carbon buildup. These areas are closely related to the engine's power output. When there is excessive carbon buildup, the car's ignition energy decreases, intake efficiency drops, and ultimately, the engine exhibits symptoms such as shaking and sluggish acceleration.
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