Is the valve spring of the new Jetta longer for the intake or exhaust?
2 Answers
The valve spring for the exhaust valve of the new Jetta is longer. Here are the relevant details: 1. The function of car valves: They are specifically responsible for introducing air into the engine and expelling the exhaust gases after combustion. Structurally, they are divided into intake valves and exhaust valves. The intake valve draws air into the engine to mix with fuel for combustion, while the exhaust valve expels the burned gases and dissipates heat. 2. Symptoms of damaged car valves: Abnormal noises may occur, the engine may experience unstable idling or poor acceleration during operation, overtaking performance may also decrease, and in severe cases, it may lead to difficulty starting the engine, failure to ignite, as well as air leakage or increased carbon deposits in the car.
I've done a lot of Volkswagen repairs myself, especially common models like the new Jetta. After opening the hood and inspecting the valve system, the exhaust valve springs are generally longer and stiffer than the intake ones because the exhaust side runs much hotter—if they're not sturdy enough, they can deform and cause leaks. Once, while repairing a customer's car with severe engine noise, I measured the spring lengths after disassembly. The exhaust springs were noticeably longer than the intake ones but showed signs of fatigue—replacing them fixed the issue. In most modern engines, this design is quite common: reinforced exhaust springs to withstand high temperatures and wear. The new Jetta follows the same approach. For long-term vehicle health, regular maintenance is crucial, and checking spring condition can prevent major problems.
