Buick Lucerne subtle thumping noise in engine possibly related to motor mount issues after repairs on Buick Lucerne

Some Buick Lucerne owners report experiencing a subtle thumping noise in the engine, particularly after repairs, which may be linked to motor mount issues. These owners note that failing motor mounts can lead to excessive engine movement, unusual noises, and increased cabin vibrations. Common symptoms reported include clunking or thumping sounds as the engine shifts, heightened engine movement during acceleration or deceleration, and amplified noise from the engine area. Additionally, some owners have observed that a failing motor mount can cause added engine movement, engine jumping while idling, and misalignment. Increased vibrations in the cabin, especially related to engine RPMs, along with a thumping or clunking sound when shifting gears, have also been reported. It is advisable for owners experiencing these symptoms to have their motor mounts inspected by a qualified mechanic to prevent further damage and ensure vehicle safety and performance.