What Causes the Engine Abnormal Noise When Accelerating in a Hot Geely Boyue?

[LeVera]

Geely Boyue hot car acceleration engine abnormal noise reasons are as follows: Engine carbon deposits: Carbon deposits can cause incomplete combustion of gasoline, making the engine shake. The impact of engine carbon deposits on the car is significant, first by reducing engine power, meaning the power output becomes uneven and gradually diminishes, in other words, the car becomes increasingly less powerful. Transmission overload operation: Overloading the transmission can degrade the quality and frictional characteristics of the transmission oil, increasing friction and wear, leading to transmission noise. At the same time, sludge (impurities or dirt) can also form inside the transmission (such as in the valve body), causing the transmission to jerk, slip out of gear, experience shocks, slip, make abnormal noises, delay, overheat, or leak oil.

[VanAliyah]

I've been driving the Boyue for over two years and encountered a situation where the engine made a clicking noise during acceleration when hot. When the oil temperature rises in a hot engine, the oil flows better but may expose clearance issues. The most common cause is loose timing chains, especially in vehicles with over 80,000 kilometers, where the stretched chain can slap against the guides, producing a metallic sound. Additionally, worn turbocharger bearings can create a high-frequency whistling noise during sudden acceleration, like a whistle. Last time, my car had a tensioner pressure relief issue, where low oil pressure when hot caused the chain to skip teeth and make noise. Exhaust manifold gaskets leaking due to thermal expansion and contraction can also produce a popping sound. Don't rush to dismantle the engine—first, check if the oil viscosity is appropriate, then locate the noise by having a mechanic use a stethoscope against the cylinder block to pinpoint the source of the abnormal sound.

[VanKingston]

The issue of the Boyue's engine noise during acceleration requires categorized analysis. If it only occurs when the engine is warm but not during cold starts, mechanical damage can generally be ruled out. I've encountered three typical scenarios: First, engine knocking – where the engine makes a metallic rattling sound like hitting iron sheets, often caused by carbon deposits affecting the compression ratio. Using two tanks of 98-octane fuel can alleviate this. Second, belt system problems – when bearings of the alternator or AC compressor dry grind at high temperatures, producing a squealing noise. If the sound disappears immediately after splashing water, this is the culprit. Third, fuel system failure – when the low-pressure fuel pump is clogged causing insufficient fuel supply, a distinct whirring sound during rapid acceleration is particularly noticeable. It's recommended to conduct a fuel pressure test and inspect the fuel filter. Never ignore abnormal noises as prolonged neglect may damage the catalytic converter.

[VanStephanie]

Hot car acceleration noises are most likely concentrated in the front section of the powertrain. During repairs, I found that the aging of the engine mounts on the Boyue is the most easily overlooked issue. When the rubber hardens due to high temperatures, engine vibrations transfer to the frame, causing a resonant muffled sound. Turbocharger pipe leaks are also common, with silicone pipes softening and cracking under high temperatures, leading to a hissing leak sound. Piston ring sticking produces a grinding noise when the engine is hot, and cylinder misfire vibrations are most noticeable during sudden acceleration. Regarding engine oil, avoid using 5W-40 and stick with 5W-30, as excessive viscosity can cause hydraulic lifters to stick, resulting in a clicking sound. It's recommended to first run a diagnostic scan to check cylinder pressure data—spending a few hundred dollars can rule out major fault risks.