Description

Sierra’s 18-3668D Thermostat Kit features a 142°F Temperature Rating. It is designed for use with 1983 and newer GM V-6 and V-8 engines with standard cooling. It is interchangeable with GLM 13390, Mallory 9-43150, Mercruiser Stern Drive 807252Q4, 807252T4. The kit contains 18-2552 Thermostat Cover Gasket, 18-2553 Thermostat Gasket, 18-2554 Thermostat Cover Gasket, 18-2917 Thermostat Housing Gasket, 18-3551 Thermostat, and 18-7173 O-Ring. Each Sierra product meets or exceeds the original equipment part it replaces.
Temperature rating: 142°F
Interchangeable with GLM 13390, Mallory 9-43150, Mercruiser Stern Drive 807252Q4, 807252T4
Kit contains 18-2552 Thermostat Cover Gasket, 18-2553 Thermostat Gasket, 18-2554 Thermostat Cover Gasket, 18-2917 Thermostat Housing Gasket, 18-3551 Thermostat, and 18-7173 O-Ring
Each Sierra product meets or exceeds the original equipment part it replaces