Durable Valve Stem Seal

On heavy equipment and other non-road machines, a worn valve stem seal is a common reason for oil getting past the valve guide—especially after long idle time, high heat cycles, dusty work sites, or extended service intervals. When the valve stem oil seal hardens or the sealing lip wears, you may notice blue smoke on cold start, higher oil consumption, carbon buildup, rough idle, or spark plug fouling on gas engines. I stock valve stem seals designed to control oil precisely—enough lubrication for the valve stem, without flooding the combustion chamber.

Fitment & Specs to Match Before You Buy

To choose the correct valve stem seal set, match the engine model, intake vs. exhaust requirement (some applications use different materials), and seal style (commonly “positive” style for tighter metering). Key factors include stem diameter compatibility, guide OD fit, heat resistance for exhaust valves, and oil compatibility. As a primary supplier, we offer high-quality parts at affordable prices, so you can refresh top-end sealing without overpaying. In addition to valve stem seals, you can also purchase other seal kits.