Motorad CH2103 Engine Coolant Thermostat Housing - Upper

Brand Motorad CH2103
Position Upper
Material Steel
Color Silver
Outlet Port Diameter 1.31
Gasket Or Seal Included Yes
Mounting Hole Quantity 2
Bolts Included No
Outlet Diameter 1.31 in
Fits Chevrolet, GMC, and Isuzu · 23 vehicles

OE-quality construction. Built by an OE supplier to meet demanding cooling-system standards.

Leak-tested design. 100% leak tested for added sealing confidence in service.

Steel housing. Silver-finished metal construction with a gasket or seal included.

Cross-references Dayco 85017, Dorman - OE Solutions 902-2048 and Gates CO34772 for the same application. See all 7.

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Engine Coolant Thermostat Housing Overview

The Motorad CH2103 engine coolant thermostat housing is built for cooling-system service where a sealed, OE-style replacement is needed. It is engineered with OEM-level standards in mind and validated for thermal shock and leak resistance.

Compatible With Chevrolet LUV, Chevrolet S10, GMC Sonoma, and Isuzu Hombre applications listed below, this thermostat housing uses a steel construction with a silver finish and includes a gasket or seal. The CH2103 is a direct-fit cooling component for vehicles that need a reliable coolant outlet housing replacement.

Key Features

  • Steel construction for cooling-system durability.
  • Thermal shock validated for demanding temperature changes.
  • 100% leak tested for sealing confidence.
  • Includes gasket or seal for the housing assembly.
  • Two mounting holes for OE-style installation.
  • 1.31 in outlet diameter.

Detailed Description

Motorad CH2103 is an engine coolant thermostat housing designed to meet or exceed OEM standards as an OE supplier product. It is intended for cooling-system repairs where the original housing has cracked, warped, or begun leaking at the outlet. The steel body and proprietary material selection are used to withstand repeated heat cycling, while the leak-tested construction supports dependable coolant control. This part cross-references Dorman - OE Solutions 902-2048 and Gates CO34772 for the same application.

For Chevrolet S10, Chevrolet LUV, GMC Sonoma, and Isuzu Hombre fitments, the CH2103 provides a service-ready replacement for the upper coolant outlet housing. The Motorad CH2103 and CH2103 part number are useful references when matching the correct thermostat housing for these cooling-system applications.

What It Is Used For

  • Replacing a cracked or corroded coolant outlet housing.
  • Restoring a leaking thermostat housing seal.
  • Addressing coolant loss at the upper housing connection.
  • Correcting fitment issues from a damaged original housing.
  • Supporting stable coolant flow through the cooling system.

Installation Notes and Tips

Verify the outlet diameter, mounting hole count, and fitment notes before installation. The housing includes a gasket or seal, and the listing does not state that bolts are included. Clean the mating surfaces thoroughly and inspect the coolant passages for residue or corrosion before assembly.

Quality Assurance

Manufactured by an OE supplier to OEM quality standards, this housing is thermal shock validated, 100% leak tested, and built to meet or exceed OEM requirements.

This part fits 23 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2005ChevroletLUV2.2LL4UpperEngine Coolant Water Outlet with housing and gasket included.
2004ChevroletLUV2.2LL4UpperEngine Coolant Water Outlet with housing and gasket included.
2003ChevroletLUV2.2LL4UpperEngine Coolant Water Outlet with housing and gasket included.
2003ChevroletS102.2LL4UpperEngine Coolant Water Outlet with housing and gasket included.
2003GMCSonoma2.2LL4UpperEngine Coolant Water Outlet with housing and gasket included.
2002ChevroletLUV2.2LL4UpperEngine Coolant Water Outlet with housing and gasket included.
2002ChevroletS102.2LL4UpperEngine Coolant Water Outlet with housing and gasket included.
2002GMCSonoma2.2LL4UpperEngine Coolant Water Outlet with housing and gasket included.
2001ChevroletLUV2.2LL4UpperEngine Coolant Water Outlet with housing and gasket included.
2001ChevroletS102.2LL4UpperEngine Coolant Water Outlet with housing and gasket included.
2001GMCSonoma2.2LL4UpperEngine Coolant Water Outlet with housing and gasket included.
2000ChevroletLUV2.2LL4UpperEngine Coolant Water Outlet with housing and gasket included.
2000ChevroletS102.2LL4UpperEngine Coolant Water Outlet with housing and gasket included.
2000GMCSonoma2.2LL4UpperEngine Coolant Water Outlet with housing and gasket included.
2000IsuzuHombre2.2LL4N/AEngine Coolant Water Outlet with housing and gasket included.
1999ChevroletLUV2.2LL4UpperEngine Coolant Water Outlet with housing and gasket included.
1999ChevroletS102.2LL4UpperEngine Coolant Water Outlet with housing and gasket included.
1999GMCSonoma2.2LL4UpperEngine Coolant Water Outlet with housing and gasket included.
1999IsuzuHombre2.2LL4N/AEngine Coolant Water Outlet with housing and gasket included.
1998ChevroletLUV2.2LL4UpperEngine Coolant Water Outlet with housing and gasket included.
1998ChevroletS102.2LL4UpperEngine Coolant Water Outlet with housing and gasket included.
1998GMCSonoma2.2LL4UpperEngine Coolant Water Outlet with housing and gasket included.
1998IsuzuHombre2.2LL4N/AEngine Coolant Water Outlet with housing and gasket included.
Directly replaces or cross-references 7 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Dayco — 85017Dorman - OE Solutions — 902-2048Gates — CO34772Motorad — CH21039CH210324576531NI