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Four Seasons 86021 Engine Coolant Thermostat Housing - Lower
| Brand | Four Seasons 86021 |
|---|---|
| Position | Lower |
| Bolt Hole Center To Bolt Hole Center | 3 |
| Description | Engine Coolant Components |
| Flange Thickness | 0.400 |
| Gasket Or Seal Included | Not Included |
| Inlet Port Diameter | 1.510 |
| Material | Aluminum |
| Meets / Exceeds OEM? | Yes |
| Overall Height IN | 7.000 |
| Style | w/o Thermostat |
| Thermostat Included? | Not Included |
| Type | Thermostat Housing |
| Product line | Thermostat Housing |
| Fits | Honda · 31 vehicles |
OE direct replacement. Meets OEM requirements for a precise thermostat housing fit.
Aluminum construction. Lightweight housing resists corrosion in cooling system service.
Thermostat housing. Built for engine coolant components without an included thermostat.
Cross-references Focus Auto Parts 86021, Motorad CH7021 and PRT 815841 for the same application. See all 8.
Thermostat Housing for Honda Civic and HR-V
Four Seasons Thermostat Housing 86021 is an aluminum engine coolant thermostat housing for select Honda Civic and Honda HR-V applications. It is built to meet or exceed OEM requirements and is supplied in a housing-only style without a thermostat.
Key Features
- Aluminum thermostat housing for engine coolant service
- Style: without thermostat
- Gasket or seal not included
- Inlet port diameter: 1.510 in.
- Bolt hole center to bolt hole center: 3 in.
- Flange thickness: 0.400 in.
- Overall height: 7.000 in.
- Meets or exceeds OEM specifications
Product Details
This Four Seasons thermostat housing is engineered for cooling system repair on Honda Civic and Honda HR-V models that use a lower or N/A thermostat housing configuration. Part number 86021 is a direct-fit coolant component for 2012-2015 Honda Civic, 2016-2017 Honda HR-V, and 2018-2020 Honda HR-V applications. This part cross-references Motorad CH7021 for the same application.
The Four Seasons Thermostat Housing line focuses on engine coolant components built for accurate fit and dependable sealing surfaces. For buyers searching for a Honda Civic thermostat housing or Honda HR-V lower thermostat housing, 86021 provides the housing body needed when replacing a damaged, corroded, or leaking coolant outlet.
Common Repair Uses
- Coolant leakage at the thermostat housing
- Cracked or warped aluminum housing
- Corrosion around the coolant outlet
- Failed sealing surface at the lower thermostat housing
- Cooling system service on Honda Civic and Honda HR-V models
Installation Notes
Verify the inlet port diameter, bolt spacing, and flange thickness against the original part before installation. Because the thermostat and gasket or seal are not included, transfer or replace those components as needed during service. Clean the mating surfaces thoroughly and inspect the cooling system for contamination before reassembly.
Quality Assurance
Four Seasons lists this thermostat housing as meeting or exceeding OEM specifications, supporting OE-level fit and function for the listed Honda applications.
| Year | Make | Model | Submodel | Transmission | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 2020 | Honda | HR-V | — | — | — | — | N/A | Thermostat Housing |
| 2019 | Honda | HR-V | — | — | — | — | N/A | Thermostat Housing |
| 2018 | Honda | HR-V | — | Automatic CVT | — | — | N/A | Thermostat Housing |
| 2018 | Honda | HR-V | LX | Automatic CVT | — | — | N/A | Thermostat Housing |
| 2018 | Honda | HR-V | EX | Automatic CVT | — | — | N/A | Thermostat Housing |
| 2018 | Honda | HR-V | EX-L | Automatic CVT | — | — | N/A | Thermostat Housing |
| 2017 | Honda | HR-V | — | Automatic CVT | — | — | Lower | Thermostat Housing |
| 2016 | Honda | HR-V | — | Automatic CVT | — | — | Lower | Thermostat Housing |
| 2015 | Honda | Civic | SE | Automatic CVT | 1.8L | L4 | Lower | Thermostat Housing |
| 2015 | Honda | Civic | Touring | Automatic CVT | 1.8L | L4 | Lower | Thermostat Housing |
| 2015 | Honda | Civic | LX | Automatic CVT | 1.8L | L4 | Lower | Thermostat Housing |
| 2015 | Honda | Civic | EX | Automatic CVT | 1.8L | L4 | Lower | Thermostat Housing |
| 2015 | Honda | Civic | HF | Automatic CVT | 1.8L | L4 | Lower | Thermostat Housing |
| 2015 | Honda | Civic | EX-L | Automatic CVT | 1.8L | L4 | Lower | Thermostat Housing |
| 2014 | Honda | Civic | Touring | Automatic CVT | 1.8L | L4 | Lower | Thermostat Housing |
| 2014 | Honda | Civic | LX | Automatic CVT | 1.8L | L4 | Lower | Thermostat Housing |
| 2014 | Honda | Civic | EX | Automatic CVT | 1.8L | L4 | Lower | Thermostat Housing |
| 2014 | Honda | Civic | HF | Automatic CVT | 1.8L | L4 | Lower | Thermostat Housing |
| 2014 | Honda | Civic | EX-L | Automatic CVT | 1.8L | L4 | Lower | Thermostat Housing |
| 2013 | Honda | Civic | Touring | Automatic | 1.8L | L4 | N/A | Thermostat Housing |
| 2013 | Honda | Civic | LX | Automatic | 1.8L | L4 | N/A | Thermostat Housing |
| 2013 | Honda | Civic | EX | Automatic | 1.8L | L4 | N/A | Thermostat Housing |
| 2013 | Honda | Civic | HF | Automatic | 1.8L | L4 | N/A | Thermostat Housing |
| 2013 | Honda | Civic | EX-L | Automatic | 1.8L | L4 | N/A | Thermostat Housing |
| 2013 | Honda | Civic | Natural Gas | Automatic | 1.8L | L4 | N/A | Thermostat Housing |
| 2012 | Honda | Civic | LX | Automatic | 1.8L | L4 | Lower | Thermostat Housing |
| 2012 | Honda | Civic | EX | Automatic | 1.8L | L4 | Lower | Thermostat Housing |
| 2012 | Honda | Civic | GX | Automatic | 1.8L | L4 | Lower | Thermostat Housing |
| 2012 | Honda | Civic | DX | Automatic | 1.8L | L4 | Lower | Thermostat Housing |
| 2012 | Honda | Civic | HF | Automatic | 1.8L | L4 | Lower | Thermostat Housing |
| 2012 | Honda | Civic | EX-L | Automatic | 1.8L | L4 | Lower | Thermostat Housing |
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