Description
The Caterpillar 9Y2586 is a used genuine Cat thermostat housing for C15, 3406E, and 3406B inline-six diesel engines. This is a take-out core unit, inspected for crack-free condition and serviceable mating surfaces, and sold as a cost-effective alternative to a new-part 137-7331 / 146-0194 housing set when the original is damaged or missing.
Specifications
| Manufacturer | Caterpillar (genuine OEM) |
|---|---|
| Part Number | 9Y2586 |
| Part Type | Thermostat Housing |
| Condition | Used — inspected take-out |
| Engine Compatibility | Caterpillar C15 ACERT, 3406E, 3406B |
| Sold As | Single housing (gaskets and thermostats not included) |
Cross References
Related new-part Cat thermostat housing references (for context):
- Caterpillar (related): 137-7331, 146-0194, 2477133, 3299776 (new-part outer / inner housing service numbers — verify your application before substituting)
Applications
This thermostat housing fits the following Caterpillar engines:
- Caterpillar C15 / C15 ACERT 15.2L (1999–2010)
- Caterpillar 3406E 14.6L (1993–2003)
- Caterpillar 3406B 14.6L (1982–1993)
Representative vehicles using these engines:
- Kenworth T600, T660, T800, W900 with Cat 3406E / C15 (1990s–2010)
- Peterbilt 379, 386, 387 with Cat 3406E / C15 (1990s–2010)
- Freightliner Coronado, Columbia, Argosy with Cat 3406E / C15
- Western Star 4900 with Cat 3406E / C15
Verify your engine serial number, housing variant (outer vs inner), and bolt pattern against your old housing before ordering. Used parts are sold as-is; gaskets and thermostats are not included.
