What is the reason for abnormal noise when starting a cold engine?
1 Answers
Cold start engine abnormal noise reasons are: Engine oil not reaching operating temperature; Worn valve rocker arms causing excessive valve clearance; Throttle body dirt due to continuous accumulation of sludge and carbon deposits. Solutions: Clean throttle body carbon deposits; Check if battery voltage is abnormal. Reasons for abnormal noise during cold start include: Poor operation of fuel tank exhaust valve; Fluid impact inside the return pump; Partial blockage inside the fuel filter. Engine: A machine that can convert other forms of energy into mechanical energy, including internal combustion engines, external combustion engines, jet engines, electric motors, etc.