Why can't a diesel car exceed 2500 RPM?
1 Answers
If a diesel car cannot exceed 2500 RPM, possible causes include issues with the turbocharger, clogged air filter, clogged oil filter, insufficient oil pressure, or high coolant temperature. Below are detailed explanations: 1. Causes: Common scenarios include: Check if the turbocharger is functioning properly and whether there are any air leaks; Clean or replace the clogged air filter; Replace the clogged diesel filter; Replace the clogged oil filter; If the fuel line is clogged, ask a mechanic to use high-pressure air to test and clear it; Check the oil level and viscosity if oil pressure is insufficient; High coolant temperature; If all these factors are ruled out, inspect the piston rings and cylinder liners. This can usually be observed from the exhaust pipe—if there is excessive exhaust, this is often the issue. 2. Pros and cons of diesel cars: Pros: Long lifespan, economical, and durable; High torque at low speeds; High safety; More environmentally friendly. Cons: Loud noise and significant vibration; High manufacturing costs, strict fuel quality requirements, and heavy weight; Due to diesel's low volatility and compression ignition, cold starts in winter are not as smooth as gasoline engines. Even with preheating devices, it may take several dozen seconds of preheating before starting.
