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Motorad 470-221 Engine Coolant Thermostat Housing Assembly
| Brand | Motorad 470-221 |
|---|---|
| Bleeder Hole | Yes |
| Bolts Included | No |
| Color | Silver |
| Gasket or Seal included | Yes |
| Gasket/Seal Material | Rubber |
| Gasket/Seal Material | Rubber |
| Hardware included | No |
| Installation Tool Included | No |
| Jiggle Pin Included | Yes |
| Material | Aluminum, Stainless Steel, Copper |
| Mounting Hardware Included | No |
| Number Of Bolt Holes | 4 |
| Number Of Outlet Ports | 1 |
| Number Of Seals | 1 |
| Opening Temperature | 221 |
| Outlet Diameter | 1.69 in |
| Start to Open Temperature | 221 Deg. F |
| Temperature | 221 Deg. F |
| Temperature (Degree) | 221 |
| Product line | Integrated Housing Thermostat |
| Fits | BMW · 7 vehicles |
OE supplier quality. Built with OEM materials and processes for dependable cooling performance.
Rapid temperature response. Copper case and wax compound react quickly to coolant changes.
Seals included. Rubber gasket and OEM-style seals are included where applicable.
Cross-references Dorman - HELP 47021, Dorman - OE Solutions 902-818 and Four Seasons 54702 for the same application. See all 11.
Integrated Housing Thermostat for BMW Cooling Systems
Motorad 470-221 is an engine coolant thermostat housing assembly built for BMW cooling system service. It combines the thermostat, housing, sensor, and seal in an OE-style layout for 1996-1998 BMW 740iL, 1997-1998 BMW 540i, and 1997-1998 BMW 740i applications.
The Integrated Housing Thermostat line is engineered around OEM specifications and processes, with materials selected for consistent temperature control and reliable sealing in demanding cooling systems. The 221 Deg. F opening temperature and integrated bleed features support proper coolant flow and air management during operation.
Key Features
- Motorad 470-221 engine coolant thermostat housing assembly
- 221 Deg. F start-to-open temperature
- Integrated housing design with thermostat, housing, sensor, and seal
- Bleeder hole and jiggle pin included for air relief
- Rubber gasket/seal included
- 4 bolt holes for OE-style mounting
- 1.69 in outlet diameter
- Aluminum, stainless steel, and copper construction
- Silver finish
Detailed Description
Motorad 470-221 is an integrated housing thermostat assembly for BMW cooling system repair. It uses a copper case and wax compound for responsive temperature control, while the offset design and air relief valve help support proper coolant circulation and bleeding. This part cross-references Dorman OE Solutions 902-818 for the same application.
Compatible With 1996-1998 BMW 740iL, 1997-1998 BMW 540i, and 1997-1998 BMW 740i, this thermostat housing assembly is a direct-fit service part for vehicles that require a 221 Deg. F thermostat housing configuration. The Motorad 470-221 part number is also referenced in aftermarket catalogs under related interchange numbers.
Common Repair Uses
- Restores coolant temperature regulation when the thermostat sticks open or closed
- Addresses coolant leaks at the housing or seal interface
- Helps correct overheating caused by restricted thermostat operation
- Supports air bleeding after cooling system service
- Replaces a worn or damaged OE-style thermostat housing assembly
Installation Notes and Tips
Verify engine code and cooling system configuration before installation. Inspect the mating surface, replace any damaged hoses or clamps, and follow the vehicle service procedure for coolant refill and air bleeding. The assembly includes a seal, but bolts and mounting hardware are not included.
Quality Assurance
Manufactured by an OE supplier using OEM-quality materials and production methods, Motorad 470-221 is built to meet the demands of modern automotive cooling systems. The design follows OEM specifications for fit and function in the listed BMW applications.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1998 | BMW | 540i | 4.4L | V8 | N/A | Temperature rating of 221F, includes thermostat, housing, sensor, and seal, meets OE specifications.; Integrated Housing Thermostat |
| 1998 | BMW | 740i | 4.4L | V8 | N/A | Temperature rating of 221F, includes thermostat, housing, sensor, and seal, meets OE specifications.; Integrated Housing Thermostat |
| 1998 | BMW | 740iL | 4.4L | V8 | N/A | Temperature rating of 221F, includes thermostat, housing, sensor, and seal, meets OE specifications.; Integrated Housing Thermostat |
| 1997 | BMW | 540i | 4.4L | V8 | N/A | Temperature rating of 221F, includes thermostat, housing, sensor, and seal, meets OE specifications.; Integrated Housing Thermostat |
| 1997 | BMW | 740i | 4.4L | V8 | N/A | Temperature rating of 221F, includes thermostat, housing, sensor, and seal, meets OE specifications.; Integrated Housing Thermostat |
| 1997 | BMW | 740iL | 4.4L | V8 | N/A | Temperature rating of 221F, includes thermostat, housing, sensor, and seal, meets OE specifications.; Integrated Housing Thermostat |
| 1996 | BMW | 740iL | 4.4L | V8 | N/A | Temperature rating of 221F, includes thermostat, housing, sensor, and seal, meets OE specifications.; Integrated Housing Thermostat |
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