What are the common problems with the B12 engine?
2 Answers
The common problems with the B12 engine include: 1. Unstable idle speed, fluctuating between high and low; 2. Lack of power during acceleration. The car engine is the device that provides power to the vehicle, acting as the heart of the car, determining its power, fuel efficiency, stability, and environmental performance. Depending on the power source, car engines can be classified into diesel engines, gasoline engines, electric motors for electric vehicles, and hybrid systems. Common gasoline and diesel engines are both types of reciprocating piston internal combustion engines, converting the chemical energy of fuel into the mechanical energy of piston movement to deliver power. Gasoline engines are characterized by high rotational speed, low weight, low noise, and easy starting; diesel engines feature high compression ratios, superior thermal efficiency, excellent fuel economy, and emission performance.
I've driven several cars equipped with the B12 engine, and the most common issue I've encountered is oil consumption. After running about a thousand kilometers, the oil dipstick shows a significant drop, mostly due to the less-than-ideal design of the oil-gas separator, which doesn't fully separate the oil vapor. Additionally, during cold starts, the timing chain often makes a clunking sound—this needs to be replaced promptly to avoid valve damage. The valve cover gasket also tends to leak oil frequently, as the plastic components are prone to deformation under high temperatures. Idle vibration is another annoyance, usually requiring carbon deposit cleaning or spark plug replacement. Overall, this engine delivers good power, but you need to check the oil level regularly and perform maintenance ahead of schedule to ensure longevity.
