What Causes the Engine Noise When Starting a Buick Excelle?

[TaylorDella]

The reasons for the engine warning light illuminating in a Buick Excelle are: 1. Poor gasoline quality leading to incomplete combustion of the air-fuel mixture in the cylinders, resulting in carbon deposits; 2. Excessive engine mileage causing weakened spark plug performance; 3. Mechanical aging of the vehicle; 4. Damage, poor contact, or signal interruption in components such as the coolant temperature sensor, crankshaft position sensor, air flow sensor, intake air temperature sensor, and oxygen sensor. Solutions for the engine warning light illumination include: 1. Promptly inspecting the engine's condition; 2. Checking the status of sensors, air flow sensors, and spark plugs; 3. Examining the vehicle for any knocking issues; 4. Inspecting the ignition coils for faults.

[McGabriela]

I also experienced a 'clicking' noise when starting my Buick Excelle. Later, I found out it was because the engine underguard was loose, causing vibrations to hit the chassis frame during startup. It could also be due to wear in the CV joint, which is more noticeable when turning—it's like a 'clunk' sound when a joint is bad. If the rubber hangers of the exhaust pipe age and crack, the metal pipes can collide, producing a 'clanging' noise. Of course, the worst-case scenario is a loose timing chain, which makes a 'rattling' sound inside the chain case, like rolling marbles. Don't ignore it—take it to the repair shop early to get it checked. Last time, I ignored the noise and ended up spending extra money on replacing engine mounts.

[JoyAnn]

I often encounter abnormal noises when starting my Buick Excelle during car repairs. The belt system should be the primary focus of inspection. A 'squeak-squeak-squeak' noise from the belt when the engine is cold is mostly caused by a stuck tensioner pulley bearing. If it's a 'clack-clack-clack' metallic knocking sound, first check if the engine oil level is sufficient - hydraulic lifters can produce this noise when starved of oil. The most typical symptom of worn engine mounts is a 'thud' sound as the engine impacts the frame during acceleration. Here's a small detail to note: abnormal noises from the fuel pump in the gas tank can also transmit to the engine compartment, producing a mosquito-like 'hummm' continuous sound. These issues actually don't cost much to fix if detected early - replacing a tensioner pulley only costs a few hundred yuan.

[Olga]

My 2015 Excelle always makes a 'clicking' sound when starting, and the inspection revealed a broken transmission mount. Although the newer models have improved the mount, there's still a gear impact noise when the dual-clutch jerks during start-up. Excessive engine carbon buildup can also cause knocking, like a 'clanging' sound from the cylinders, especially noticeable when using 92-octane fuel. Last time, an endoscope showed my car's piston top had 3mm of carbon buildup, which improved significantly after cleaning. Turbocharged cars need attention on the turbine blades; foreign objects sucked in can cause a 'scraping' sound. Actually, when hearing abnormal sounds, you should check the OBD data stream—the ECU records abnormal cylinder pressure.