What causes the Roewe RX5 to have no response when starting and produce abnormal noises?
1 Answers
Here are the reasons why a car may have no response when starting and produce abnormal noises: 1. A sharp abnormal noise at the moment of starting is caused by belt slippage, insufficient tensioner preload, or prolonged belt usage. 2. Abnormal noises are caused by the starter gear and engine flywheel teeth grinding. Due to prolonged use of the starter and flywheel, severe gear wear leads to misalignment and grinding sounds. 3. The noise from the engine's valve closing mechanism in the valve train, which is the loudest in the engine. 4. Metallic friction noises occur because the vehicle has been parked for a long time, causing the oil to flow back into the oil pan. At the moment of engine start, the components are not fully lubricated, resulting in metallic friction sounds. 5. The sound of the car's fuel pump starting to work.