A small unit that snaps into a groove in the end of the valve stem . It is designed to secure the valve spring , valve spring retaining washer and valve stem together. Some are of a split design, some of a horseshoe shape, etc. Also called " valve key " or "valve retainer."
VALVE KEEPER
Meaning of VALVE KEEPER in English
English dictionary of automotive terms. Английский словарь автомобильных терминов. 2012