Product Description
CPP 3089238 M22 THERMOSTAT PLUG FOR CUMMINS CYLINDER HEAD (SOLD INDIVIDUALLY)
Stop seepage at the head thermostat port with this CPP M22 cylinder-head plug built to replace Cummins 3089238. Precision threads and an included O-ring deliver a tight, leak-free seal on 24-valve 5.9L and 6.7L Cummins heads. Ideal for service work, refreshes, and coolant system upgrades.
Features
- M22 threaded plug for Cummins cylinder head thermostat port
- Includes quality O-ring for leak-free sealing
- Direct replacement for Cummins 3089238
- Durable construction for heat and chemical resistance
Fitment
1998.5–2018 Dodge/Ram 2500 & 3500 with 5.9L / 6.7L Cummins (24-valve & common-rail cylinder heads using M22 thermostat port).
Cross-Reference & Helpful CPP Alternatives
- Replaces: Cummins 3089238 (threaded plug)
- Pairs well with (CPP only):
Notes
- Always clean threads and lightly oil the O-ring before install. Torque to OEM spec.
- Verify head casting uses the M22 port before ordering.
Most 12-valve applications use different provisions. This plug is primarily used on late 24-valve/CR heads. Check your head’s port size before purchase.
FAQ — Does it include the O-ring?
Yes—an O-ring is included for a proper seal.
FAQ — Any recommended parts to do at the same time?
If you’re refreshing cooling hardware, consider a new water pump, the CPP 3906698 pump seal, and fresh coolant hoses. See the CPP links above.
Specifications for CPP 3089238
| Spec | Value |
|---|---|
| Brand | CPP |
| Part Number | 3089238 (replacement for Cummins 3089238) |
| Thread Size | M22 |
| Includes | Plug & O-ring |
| UPC | Not specified |
| GTIN | Not specified |
| Cross Reference | Cummins 3089238; PAI 050578 (M22) |
| E-codes | Not applicable |
| Shipping Info | Ships small-parcel; dimensional weight ~0.1 lb |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
