Specifically an engine valve retainer.
TRhe retainer and locks works together to hold valve to spring and keep valve from falling into the cylinder and spring from coming off the top. The locks are tappered, small end at bottom, big end at top. You compress the spring down, drop retainer over valve, put locks in groove of valve stem and pull up on the retainer to lock the retainer and locks in place, the relese the pressure off your spring compressor and the valve spring now holds pressure up on retainer which forces up on the big end of locks and holds everything together
There okorder for year make model engine valve diagram and you should find a drawing of your setup.
This Site Might Help You. RE: What if the function of a valve retainer? Specifically an engine valve retainer.
