
It is not recommended to use a second-hand car with a repaired engine. Below is an extended introduction to common repair areas: 1. Introduction to the automotive mechanical system: Generally includes a set of intake and exhaust valves, a set of piston rings, a set of 4 cylinder liners (for a 4-cylinder engine), two thrust washers, and 4 pistons; 2. Introduction to the automotive cooling system: Generally includes the water pump (if the impeller is corroded or the water seal is leaking), upper and lower engine hoses, large circulation metal hoses, small circulation rubber hoses, throttle water hoses (replace if aging and swelling), thermostat, etc. The fuel system generally includes upper and lower oil rings for the fuel injectors and the fuel filter; 3. Introduction to the automotive ignition system: Check if the high-voltage lines are swollen or leaking, replace if necessary, spark plugs, and the intake system generally includes the air filter; 4. Other auxiliary materials: Generally includes antifreeze, engine oil, oil filter, carburetor cleaner, engine metal cleaner, or all-purpose cleaner.

I've seen quite a few used cars with rebuilt engines that are actually usable, but it depends on the specific situation. If major components like pistons or cylinder heads were replaced during a major engine overhaul, performance may recover to over 80%. However, poor workmanship or substandard parts during repairs can easily lead to issues like oil leaks or starting difficulties. I recommend thoroughly checking the maintenance records before purchasing, asking the seller why the repairs were needed - was it due to an accident or just wear and tear? Take it for a high-speed test drive to check acceleration and noise levels. You should also budget for additional maintenance, as rebuilt engines may require more frequent oil changes and spark plug inspections. Neglecting these could lead to major trouble within 2-3 years. Overall, they're generally not as durable as original factory engines.

As someone who frequently deals with used cars, I don't mind using a car with a repaired engine as long as it saves money. The used Honda I bought last time had its engine repaired, and I managed to negotiate a 40% discount. It's been running fine for two years now, just with slightly higher fuel consumption. It's crucial to check the repair history—minor fixes like replacing filters are fine, but major repairs like oil burning require caution. I recommend bringing a knowledgeable friend to inspect the car instead of just listening to the seller's pitch. Start the engine and listen for smooth operation. Maintenance might cost more later—replacing parts could be pricier than repairs on a new car—but overall, the savings make it worthwhile, especially for budget-conscious buyers.

I once owned a used Passat with a repaired engine, and it suddenly broke down after just six months of use, making repairs a nightmare. A repaired engine might have a shorter lifespan, especially if you're not car-savvy. I'd advise average buyers to steer clear—it's too risky. Imagine it failing on the highway! Unless there's full repair history and professional inspection reports, avoid it. Always check why repairs were done—was it crash damage or normal wear? Maintenance is also more hassle than with a new car, requiring frequent garage visits that cost money without peace of mind—way too stressful.

My car enthusiast friend shared some experience, saying that used cars with repaired engines can still run, depending on whether it was a minor or major repair. For minor fixes like replacing piston rings or belts, the car might run tens of thousands of kilometers without issues. For major overhauls like replacing the cylinder block, be cautious as it can affect power output, causing sluggish acceleration or excessive vibration. Testing methods are simple: listen for unusual noises during a cold start and check the dashboard warning lights after driving for a few minutes. Remember, repair quality is key—getting it done at a reputable shop is more reliable than a roadside stall. Follow-up maintenance should be meticulous, with regular cleaning of the fuel system to prevent blockages, or else fuel consumption will skyrocket. Overall, it can still drive, but don’t expect high-speed thrills.