What to do if the Crown valve oil seals are installed incorrectly due to different colors?
2 Answers
Crown valve oil seals installed incorrectly due to different colors can be resolved by removing and reinstalling them correctly. The function of automotive valves is to specifically intake air into the engine and expel exhaust gases after combustion. Structurally, they are divided into intake valves and exhaust valves. The intake valve's role is to draw air into the engine to mix with fuel for combustion; the exhaust valve's function is to expel the burned exhaust gases and dissipate heat. Symptoms of damaged automotive valves are as follows: 1. It will affect the engine's working efficiency, reducing the car's power. 2. Abnormal noises may occur, with the engine experiencing unstable idling or poor acceleration during operation, and reduced overtaking performance. In severe cases, it may also cause difficulty starting the engine, leading to failure to ignite, and the car may exhibit air leakage or increased carbon buildup. 3. Damaged valves can cause unstable cylinder operation, leading to engine shaking, reduced engine power, and potential blockage of the exhaust system. In severe cases, it may also result in black smoke emissions from the exhaust.
Having worked on cars for years, I've seen this issue before. Different colors on Crown valve stem seals usually indicate different sizes or materials. If they're installed incorrectly, you need to address it immediately to avoid major trouble. The color variation might be due to differences in valve stem thickness or thermal expansion coefficients. Installing the wrong seal can cause engine oil to leak into the combustion chamber, mixing with fuel and burning, resulting in blue exhaust smoke, reduced engine power, or even permanent damage. In this situation, don't start the engine. Instead, use tools to carefully remove the valve cover section, take out the incorrectly installed seal, check for any damage, and then install a new seal with the correct color according to the manual or original car photos. It's best to ask a professional mechanic for help, as they know the precise installation techniques to avoid secondary damage. During regular maintenance, clearly mark part positions to minimize errors—this can save you a lot of hassle.
