What are the symptoms of valve stem seal failure?
1 Answers
Valve stem seal failure can cause: 1. The engine oil level will gradually decrease due to valve stem seal failure, eventually leading to insufficient oil quantity (low oil pressure); 2. Valve stem seal failure may result in carbon buildup in the combustion chamber, causing poor engine performance; 3. If the valve stem seal becomes loose or detached, engine oil may enter the combustion chamber through the valve guide, leading to oil burning. Valve stem seals are typically made by vulcanizing an outer metal frame with fluororubber, featuring a self-tightening spring or wire at the radial opening. They serve to seal the engine valve guide and belong to a category of oil seals. Oil from valve stem seals will burn in the combustion chamber. If the valve stem seal leaks oil due to poor sealing, the exhaust may emit blue smoke, and carbon deposits can easily accumulate over time.