How to Inspect a Used Car Engine?
2 Answers
First, inspect the exterior, then check the screws, and finally listen to the sound. Below are the relevant details: Used car inspection items: 1. Engine: Check compression pressure, emissions, ignition, timing, etc. 2. Clutch: Clutch cable adjustment, noise detection, etc. 3. Transmission: Gear shift operability, transmission fluid level, etc. 4. Suspension: Shock absorber leakage, etc. 5. Drivetrain: Differential leakage and noise, etc. 6. Steering system: Steering rack, etc. 7. Brakes: Brake pad wear. 8. Cooling system: Pipe leakage, etc.
When it comes to inspecting a used car's engine, based on my experience of buying several used cars, this is something you can't take lightly. Open the hood and take a good look to check for oil stains or rust. Common leak spots like the oil pan and around the valve cover often have issues. Start the car and listen to the sound—it should be smooth at idle, without any harsh metal clanking or rattling noises. Then rev the engine to test the RPM response; if it's slow or shaky, there might be ignition system problems. Pull out the dipstick to check the oil color and level—if it's black or shows signs of emulsification, the engine internals may be heavily worn. Bring an OBD scanner to read any fault codes and uncover hidden issues. Also, take it for a test drive to feel the acceleration and uphill performance, and make sure it doesn’t stall when idling with the AC on. Remember, the engine's condition affects the entire car's lifespan—don’t skip this step and regret major repairs later.
