How often should valve stem seals be replaced?
2 Answers
Valve stem seals should be replaced every 20,000 to 30,000 kilometers. As one of the critical components of the engine's valve train, they play a vital role. Valve stem seals prevent engine oil from entering the intake and exhaust pipes, avoid oil loss, and also prevent the leakage of the air-fuel mixture and exhaust gases, thereby preventing the engine from burning oil. The primary material of valve stem seals is fluororubber. Over time, rubber products can age and harden. Therefore, to avoid a series of malfunctions caused by hardened valve stem seals, regular inspection and maintenance of automotive components are necessary. If the valve stem seals are damaged, they should be replaced promptly.
I've been driving for over 20 years. I remember one time when my car started emitting blue smoke and fuel consumption skyrocketed. After taking it to the repair shop, we found out it was caused by worn valve stem seals leading to oil burning. The mechanic told me these are usually replaced during engine overhauls, and should be inspected approximately every 80,000 to 120,000 kilometers. Don't wait until they fail completely, otherwise the engine could be damaged or even stall, especially in older vehicles. Now I proactively have technicians check the seal condition every 100,000 kilometers. Preventing problems in advance saves both money and hassle - safety always comes first.
