Cold enrichment thermostat enclosure

A cold enrichment thermostat enclosure adapted for use on an internal combustion engine, said enclosure comprising a housing having at least two circumferentially spaced rim portions with axially spaced front and rear surfaces, a cover having axially spaced inner and outer surfaces, said inner surface of said cover overlying said front surface of said housing rim portions, a thermostat enclosed between said housing and said cover, each of said rear surfaces of said housing rim portions having a lip extending axially away from said cover, said outer surface of said cover having a peripheral ridge extending axially away from said housing and a spring clip associated with each of said housing rim portions for retaining said cover in assembly with said housing, each of said clips including a hook portion embracing said lip of the associated housing rim portion, a shank portion having a first section extending axially from said hook portion approximately to the plane of said outer surface of said cover, a second section extending radially outwardly from said first section, and a third section extending axially from said second section beyond the plane of said outer surface of said cover, a cantilever portion extending radially inwardly from said third section of said shank portion beyond said cover ridge, and a gripping portion extending axially from said cantilever portion toward said outer surface of said cover and having a serrated edge engaging said outer surface to preclude rotary motion of said cover under said clip, said housing further having circumferentially spaced projections extending radially on each side of each of said clips to prevent movement of said clips about said housing, whereby said cover is retained against rotation on said housing.