New Thermostat Snap Retaining Ring for IH Farmall and International Harvester 140, 130, 100, 200, 330, 340, 404, Super C, 424 and other tractor models with the C123, C146, and C153 engines.
Case IH part numbers 257441R2, 105-22212, 35364.
Thermostat snap ring holds the thermostat in the tractors engine water neck.
On many of the above IHC tractors the previous owners may have removed the thermostat and discarded this retainer ring. Over time the groove this ring fits into will become filled with rust and scale. Clean the groove out good with a pick or other pointed tool to allow the ring to seat into the groove.