GF40 Valve Spring Retainer OS49460400 for O.S. Engine  [OS49460400]

GF40 Valve Spring Retainer Overview

This O.S. Engine OS49460400 valve spring retainer is a replacement component for GF40 glow/nitro engines, designed to retain the valve springs during assembly, inspection and tuning. Its role is purely mechanical within the cylinder head, helping maintain correct spring seating which supports stable valve timing under load.

Fitting is straightforward for anyone familiar with glow engine head service: remove the cylinder head and valve assembly as required, locate the retainer on the valve stem and reassemble components in the proper order, confirming springs and keepers seat correctly. Follow standard engine reassembly practice and verify clearances before running the engine.

For routine tuning and maintenance the retainer is a small but critical part, especially when changing spring rates or carrying out frequent head work; inspect the retainer and springs for signs of wear or deformation after heavy use and replace if any looseness or damage is found to avoid valve train inconsistency.