Collection: Thermostats
Thermostats are crucial components of the engine cooling system that regulate the flow of coolant to maintain optimal engine temperature. They are typically located between the engine & the radiator. The thermostat works by opening & closing based on the temperature of the coolant. When the engine is cold, the thermostat remains closed, preventing coolant from flowing through the radiator. This allows the engine to warm up quickly. Once the engine reaches the desired operating temperature, the thermostat opens, allowing coolant to flow through the radiator to dissipate heat. If the engine temperature drops below the set threshold, the thermostat closes again to maintain the optimal operating temperature. Thermostats are designed to ensure that the engine doesn't overheat or run too cool, which can negatively impact performance & fuel efficiency. Over time, thermostats can wear out or become stuck in either the open or closed position, leading to overheating or poor heating in the cabin. Regular maintenance & replacement of thermostats are important to ensure proper engine cooling & overall performance of the vehicle.
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Coolant Hose (Radiator to Thermostat)
Part # 025-121-062E-AMVendor:GoWestyRegular price $24.95 USDRegular priceSale price $24.95 USD -
GoWesty Thermostat Housing Kit
Part # GVW-THERM-HSNG-DLXVendor:GoWestyRegular price $325.00 USDRegular priceSale price $325.00 USD -
Thermostat Housing Pump Coolant Hose
Part # 025-121-073HVendor:GoWestyRegular price $9.95 USDRegular priceSale price $9.95 USD -
Thermostat Housing to Distribution Tower Coolant Hose
Part # 251-121-058AVendor:GoWestyRegular price $10.95 USDRegular priceSale price $10.95 USD -
Lower Thermostat Housing - Aluminum [2WD & Syncro]
Part # 025-121-117E-KITVendor:GoWestyRegular price From $42.95 USDRegular priceSale price From $42.95 USD -
Lower Thermostat Housing [Late Vanagon 2WD]
Part # 025-121-115Vendor:GoWestyRegular price $65.95 USDRegular priceSale price $65.95 USD -
Coolant Hose (Thermostat Housing to Bleeder Valve) [Early Vanagon]
Part # 025-121-073EVendor:GoWestyRegular price $29.95 USDRegular priceSale price $29.95 USD -
Upper Thermostat Housing [Late Vanagon]
Part # 025-121-114Vendor:GoWestyRegular price $19.95 USDRegular priceSale price $19.95 USD -
Stainless Steel Coolant Pipe - Water Pump to Thermostat [Late Vanagon]
Part # 025-121-081G-SSVendor:GoWestyRegular price $203.95 USDRegular priceSale price $203.95 USD -
Coolant Hose - Lower Crossover Pipe to Thermostat Housing [Syncro]
Part # 251-121-072-AMVendor:GoWestyRegular price $10.95 USDRegular priceSale price $10.95 USD -
Coolant Hose - Thermostat to Oil Cooler [Late Vanagon]
Part # 025-121-058DVendor:GoWestyRegular price $3.95 USDRegular priceSale price $3.95 USD -
Thermostat Housing Bundle
Part # THERM-HSNG-BUNDLE-2.1Vendor:GoWestyRegular price $117.95 USDRegular priceSale price $117.95 USD -
87°C Thermostat
Part # 025-121-113FVendor:GoWestyRegular price $35.95 USDRegular priceSale price $35.95 USD -
Billet Upper Cover for Thermostat Housing
Part # GVW-025-121-114Vendor:GoWestyRegular price $106.00 USDRegular priceSale price $106.00 USD -
1.9 Thermostat Housing Gasket
Part # 025-121-127CVendor:GoWestyRegular price $5.95 USDRegular priceSale price $5.95 USD -
Coolant Hose (Thermostat Housing to Bleeder Valve) [Early Vanagon]
Part # 025-121-103CVendor:GoWestyRegular price $22.95 USDRegular priceSale price $22.95 USD -
Thermostat Housing Bundle (1900cc) [Vanagon]
Part # THERM-HSNG-BUNDLE-1.9Vendor:GoWestyRegular price $466.95 USDRegular priceSale price $466.95 USD -
O-Ring for Lower Thermostat [Late Vanagon]
Part # N-902-781-01Vendor:GoWestyRegular price $1.15 USDRegular priceSale price $1.15 USD -
Coolant Hose - Thermostat Housing to Oil Cooler [Late Vanagon]
Part # 025-121-058EVendor:GoWestyRegular price $3.95 USDRegular priceSale price $3.95 USD -
HOLLEY Elect Choke Thermostat 45-230
Part # 45-230Vendor:HOLLEYRegular price $101.95 USDRegular price$114.95 USDSale price $101.95 USDSale -
DERALE LS Engine Thermostatic Bypass Cooler Adapter 35621
Part # 35621Vendor:DERALERegular price $204.74 USDRegular price$225.21 USDSale price $204.74 USDSale -
CHEVROLET PERFORMANCE Engine Coolant Thermostat 190 Degrees 89018168
Part # 89018168Vendor:CHEVROLET PERFORMANCERegular price $56.99 USDRegular price$62.69 USDSale price $56.99 USDSale -
BILLET SPECIALTIES Thermostat Housing Straight LT Engine Black BLK90524
Part # BLK90524Vendor:BILLET SPECIALTIESRegular price $214.45 USDRegular price$235.89 USDSale price $214.45 USDSale -
EDDIE MOTORSPORTS Thermostat Housing LS Engine MS106-90M
Part # MS106-90MVendor:EDDIE MOTORSPORTSRegular price $124.07 USDRegular price$136.48 USDSale price $124.07 USDSale



![Lower Thermostat Housing - Aluminum [2WD & Syncro]](http://milkymotorsports.com/cdn/shop/files/full_2e4d47c0aa93278acf7895e495715f4e.jpg?v=1787689104&width=533)
![Lower Thermostat Housing [Late Vanagon 2WD]](http://milkymotorsports.com/cdn/shop/files/THERM-HSNG-BUNDLEDET_df9ab8d5-fea8-4e5c-8d71-fbad6c52a9fa.jpg?v=1785526954&width=533)
![Coolant Hose (Thermostat Housing to Bleeder Valve) [Early Vanagon]](http://milkymotorsports.com/cdn/shop/files/full_52ba99c09f643a2972904101ed2f7402.jpg?v=1791402263&width=533)
![Upper Thermostat Housing [Late Vanagon]](http://milkymotorsports.com/cdn/shop/files/full_1442e743d71c6383f01cfcff068d7bc3.jpg?v=1785445094&width=533)
![Stainless Steel Coolant Pipe - Water Pump to Thermostat [Late Vanagon]](http://milkymotorsports.com/cdn/shop/files/full_84196338afeeef7a42e79b7dcf47be80_919ad395-52e1-4829-9d8a-374b47227fc5.jpg?v=1785445484&width=533)
![Coolant Hose - Thermostat to Oil Cooler [Late Vanagon]](http://milkymotorsports.com/cdn/shop/files/full_3bba404e509561891a727d955dd3fc9b.jpg?v=1785862606&width=533)



![Coolant Hose (Thermostat Housing to Bleeder Valve) [Early Vanagon]](http://milkymotorsports.com/cdn/shop/files/full_31ce166ad7bed7a8edb9b1e410cfdcf3.jpg?v=1786047813&width=533)
![Thermostat Housing Bundle (1900cc) [Vanagon]](http://milkymotorsports.com/cdn/shop/files/THERM-HOUSING-BUNDLE-1.9DET1.jpg?v=1786141614&width=533)
![Coolant Hose - Thermostat Housing to Oil Cooler [Late Vanagon]](http://milkymotorsports.com/cdn/shop/files/full_0f2143f17295cb42f481fc383611f4c1.jpg?v=1785445489&width=533)