What causes the idle noise in Changan CS55?
3 Answers
It may be due to engine malfunction. Here are some relevant details about the Changan CS55: 1. Dimensions: The vehicle measures 4500x1855x1690mm in length, width, and height, with a wheelbase of 2650mm. 2. Powertrain: In addition to the conventional 1.5T engine, a 48V motor is installed at the front of the engine, paired with a 48V battery pack. The engine delivers a maximum power of 115kW (156 horsepower) at 5500rpm and a peak torque of 225 N·m between 2000-4000rpm. The 48V motor provides a maximum power of 11.5kW and a peak torque of 50 N·m. The 48V battery pack, located beneath the trunk floor, has a capacity of 0.8kWh.
My CS55 is making strange noises at idle, which is quite a headache. Common causes include a loose engine belt or worn bearings. Generally, an aging belt will squeak, sounding like friction noise; a failed bearing, such as the water pump bearing, can cause a humming or clicking sound. It could also be loose engine mount bolts, leading to slight body vibration and noise. Issues are more likely to occur during cold starts. If the noise persists after the engine warms up, it's time to check the vacuum pump or oil pump, as poor oil circulation can also cause noise. I suggest starting with the basics: identify the source of the sound. If it's coming from the front, it might be the belt; if it's from the rear, consider the exhaust system. Finally, don't try to fix it yourself—take it to the 4S shop as soon as possible for a diagnostic scan. Safety first! Avoid prolonged idling before repairs to prevent further wear and tear.
When it comes to idle speed abnormal noise, my CS55 has encountered similar situations, usually caused by engine component malfunctions. For example, a faulty belt tensioner can produce a ticking sound, or a crankshaft position sensor failure may trigger knocking noises. Additionally, wear on the air conditioning compressor pulley is also a common culprit, as minor issues become more noticeable at idle due to lower load. From my research, debris stuck in the engine compartment or leaks in the intake system can also cause hissing sounds. For diagnosis, I recommend turning off the air conditioning and audio system, then listening for sound changes while revving in neutral gear: if the noise disappears during acceleration, it indicates the problem lies with low-speed components. Before driving, always take a quick look under the hood for oil stains or loose parts - these details can be very helpful. Timely repairs can save you significant money.
