What are the reasons for the failure of the Magotan exhaust valve?
2 Answers
The reasons for the damage to the Magotan exhaust valve are as follows: 1. The service life has reached its limit, meaning aging. The exhaust valve operates under high engine temperatures, and over time, like the valve cover gasket and rubber rings, it will age. 2. Improper maintenance. 3. Quality issues with the exhaust valve itself. 4. Fuel quality problems. Below is more information about the Magotan: 1. Body dimensions: The length, width, and height of the body are 4865mm, 1832mm, and 1471mm respectively, with a wheelbase of 2871mm and a fuel tank capacity of 66 liters. 2. Powertrain: The front suspension is a MacPherson strut independent suspension, and the rear suspension is a multi-link independent suspension. It is equipped with a 1.4L turbocharged engine, delivering a maximum horsepower of 150 PS, a maximum power of 110 kW, and a maximum torque of 250 Nm, paired with a 7-speed dual-clutch transmission.
My Passat's exhaust gas recirculation (EGR) valve failed once, primarily due to excessive carbon buildup. During driving, engine exhaust gases recirculate through this valve. Over time, oil residues and carbon particles accumulate inside, causing the valve to get stuck in either open or closed position. Particularly with Volkswagen's design, the EGR valve is located in the engine's high-temperature zone, accelerating carbon deposition. I mostly drive in urban areas with frequent traffic lights, where the engine often operates at low RPMs – conditions that promote residue formation. Neglecting regular cleaning worsens the situation, much like clogged pores from skipped showers. I recommend inspecting/cleaning the valve every 20,000km or using specialized detergent additives to prevent clogging. When it fails, not only does it cause emission violations, but also triggers engine vibrations and drastic fuel consumption spikes – truly troublesome.
