What are the precursors of timing chain failure in Roewe 350?
3 Answers
Roewe 350 timing chain failure precursors include difficulty in ignition when starting the car in a cold state, or obvious "clicking" abnormal noise from the engine when stepping on the accelerator pedal. If you find that the car has difficulty in ignition or the engine noise is very loud, you should check whether the timing chain of the car is faulty in time. If so, the timing chain should be repaired or replaced in time. The following is the information about the timing chain: 1. The timing chain connects the timing wheel of the engine cylinder head and the crankshaft, and cooperates with a certain transmission ratio to ensure the accuracy of the intake and exhaust time. 2. The timing chain plays a "bridge" role in the engine. Driven by the crankshaft, it transmits kinetic energy to the corresponding parts, and keeps the pistons, valves and other parts in the correct position at different steps, so that the engine can operate normally.
I remember before my old 350 had issues, there was a 'clattering' friction sound coming from the engine bay near the driver's side, especially noticeable during cold starts, like a metal chain slipping. The noise became louder when the RPM exceeded 2000, and although it improved slightly after the engine warmed up, it didn't disappear. When the AC was on or going uphill, the engine clearly lacked power, and the idle needle wasn't very stable. Later, a mechanic checked it and said the chain had stretched and could skip teeth. Although the dashboard didn't show any warning lights, continuing to drive could lead to valve damage. He suggested checking for trouble codes if unusual noises are heard, and being alert if it shows a camshaft position deviation.
Last winter, I noticed something was off during cold morning starts. After turning the key, the engine wheezed for ages before firing up, like it was gasping for air. The most annoying part was the whole car shaking at idle, with the steering wheel vibrating so badly it made my hands go numb. When I took it in for inspection, they found severe wear on the timing chain guides – the chain was practically sagging. The mechanic said these aluminum guides are only designed to last about 100,000 kilometers. Once the chain stretches and skips 2-3 teeth, the valve timing goes completely out of whack. Now I've developed a habit of listening before starting – if I hear that distinct ticking sound like a stopwatch, I know it's time to open my wallet for repairs.
