Motorad CH1038 Engine Coolant Thermostat Housing - Lower

OE Quality 60-Day Returns

Motorad CH1038 Engine Coolant Thermostat Housing - Lower

Brand	Motorad CH1038
Position	Lower
Material	Metal
Color	Silver
Outlet Port Diameter	2.11
Height	4.84
Gasket Or Seal Included	No
Mounting Hole Quantity	5
Bolt Hole Center To Bolt Hole Center	1.94
Inlet Port Diameter	1.56
Flange Thickness	1.01
Mounting Hole Diameter	0.28
Bolts Included	No
Color	Silver
Height	4.84 in
Number Of Seals	0
Outlet Diameter	0.3 in
Outlet Port Quantity	9
Fits	Toyota · 36 vehicles

OE-supplier quality. Built to OEM standards for dependable cooling-system service.

Metal housing. Silver construction with precise port and flange dimensions.

Leak tested. Validated for thermal shock and sealing performance.

Cross-references Motorad CH1038, 9CH1038 and 16323-31021 for the same application. See all 4.

$102.40Free shipping

In stock · usually ships same day before 1pm CST

Step 1 — Confirm fitment

Free return shipping if it doesn't fit when you check fitment here first.

Confirm position

Select your vehicle to confirm fitment

Verify this part fits before purchasing — free returns if it doesn't

Step 2 — Quantity

Free shipping to the continental U.S.

Free returns within 60 days if it doesn't fit when fitment is verified.

Not what you need? See all Engine Coolant Thermostat Housing options

Engine Coolant Thermostat Housing

Motorad CH1038 is an engine coolant thermostat housing built for lower cooling-system service on select Toyota trucks and SUVs. It is made from metal and finished in silver, with OE-supplier manufacturing standards and thermal shock validation for demanding coolant conditions.

Key Features

Metal thermostat housing construction for cooling-system durability
Silver finish
Lower position application
5 mounting holes for secure installation
Inlet port diameter: 1.56 in
Outlet port diameter: 2.11 in
Thermal shock validated and 100% leak tested
OE-supplier manufacturing standards

Detailed Description

This Motorad thermostat housing, part number CH1038, is engineered as a lower engine coolant water outlet with housing for Toyota cooling-system service. It is a metal replacement housing with a silver finish and precise port and flange dimensions to match the original layout. The design is built to meet OEM quality expectations and is validated for thermal shock and leak integrity, making it a direct-fit service part for Toyota 4Runner, Tacoma, and Tundra applications listed below. This part cross-references Toyota 16323-31021 and 163230P020 for the same application.

Vehicle Fitment

Fits 2023-2024 Toyota 4Runner, Lower
Fits 2010-2022 Toyota 4Runner, Lower. Notes: Engine Coolant Water Outlet with housing.
Fits 2005-2015 Toyota Tacoma, Lower. Notes: Includes housing; with Towing Package
Fits 2005-2014 Toyota Tundra, Lower. Notes: Engine Coolant Water Outlet with housing.

Common Issues This Part Can Address

Coolant leaks at the thermostat housing or water outlet
Cracked or warped plastic housing on the lower cooling circuit
Improper sealing at the coolant outlet connection
Cooling-system service needs on a worn original housing

Installation Notes and Tips

Verify the lower-position application, port sizes, and mounting-hole layout before installation. This housing does not include a gasket or seal, so the sealing components must be selected separately. Inspect the mating surfaces, flush the cooling system if contamination is present, and torque fasteners to the vehicle manufacturer’s specification.

Quality Assurance

Motorad manufactures this housing to OEM quality standards as an OE supplier. It is thermal shock validated and 100% leak tested to confirm sealing performance under cooling-system conditions.

This part fits 36 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Liters	Cylinders	Position	Notes
2024	Toyota	4Runner	4.0L	V6	Lower	—
2023	Toyota	4Runner	4.0L	V6	Lower	—
2022	Toyota	4Runner	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2021	Toyota	4Runner	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2020	Toyota	4Runner	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2019	Toyota	4Runner	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2018	Toyota	4Runner	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2017	Toyota	4Runner	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2016	Toyota	4Runner	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2015	Toyota	4Runner	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2015	Toyota	Tacoma	4.0L	V6	Lower	Includes housing; with Towing Package
2014	Toyota	4Runner	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2014	Toyota	Tacoma	4.0L	V6	Lower	Includes housing; with Towing Package
2014	Toyota	Tundra	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2013	Toyota	4Runner	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2013	Toyota	Tacoma	4.0L	V6	Lower	Includes housing; with Towing Package
2013	Toyota	Tundra	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2012	Toyota	4Runner	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2012	Toyota	Tacoma	4.0L	V6	Lower	Includes housing; with Towing Package
2012	Toyota	Tundra	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2011	Toyota	4Runner	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2011	Toyota	Tacoma	4.0L	V6	Lower	Includes housing; with Towing Package
2011	Toyota	Tundra	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2010	Toyota	4Runner	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2010	Toyota	Tacoma	4.0L	V6	Lower	Includes housing; with Towing Package
2010	Toyota	Tundra	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2009	Toyota	Tacoma	4.0L	V6	Lower	Includes housing; with Towing Package
2009	Toyota	Tundra	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2008	Toyota	Tacoma	4.0L	V6	Lower	Includes housing; with Towing Package
2008	Toyota	Tundra	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2007	Toyota	Tacoma	4.0L	V6	Lower	Includes housing; with Towing Package
2007	Toyota	Tundra	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2006	Toyota	Tacoma	4.0L	V6	Lower	Includes housing; with Towing Package
2006	Toyota	Tundra	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
2005	Toyota	Tacoma	4.0L	V6	Lower	Includes housing; with Towing Package
2005	Toyota	Tundra	4.0L	V6	Lower	Engine Coolant Water Outlet with housing.
No rows match your filter.

Directly replaces or cross-references 4 part numbers

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

Motorad — CH10389CH103816323-31021163230P020