Cummins X15 EGR Valve Mounting Bolts
The X15 EGR valve mounts to the EGR cooler outlet with four bolts. Proper torque ensures the EGR valve gasket seals correctly and prevents exhaust gas leaks into the intake. Coolant line fittings must also be torqued to prevent coolant leaks at the EGR cooler.
Important: These torque specs are reference values. Always verify against your OEM service manual for your specific engine serial number and build date. Torque-to-yield bolts must be replaced — never reused.
Torque Specifications
| Step | Torque Value | Notes |
|---|---|---|
| EGR Valve Mounting Bolts | 18 ft-lbs (24 Nm) | Use new gasket. Torque in a cross pattern. |
| EGR Cooler Coolant Inlet Fitting | 37 ft-lbs (50 Nm) | Apply thread sealant to fitting threads. |
| EGR Cooler Coolant Outlet Fitting | 37 ft-lbs (50 Nm) | Apply thread sealant to fitting threads. |
Related Fault Codes
Click any fault code to open the AI Diagnostic Engine for guided troubleshooting.
Frequently Asked Questions
What is the torque spec for Cummins X15 EGR valve bolts?
X15 EGR valve mounting bolts torque to 18 ft-lbs (24 Nm) in a cross pattern with a new gasket.
Do X15 EGR valve bolts require a new gasket?
Yes — always use a new EGR valve gasket on installation. Reusing the old gasket risks exhaust gas leaks.
What fault codes are related to X15 EGR valve issues?
Common related fault codes include SPN 412 FMI 3 (EGR temperature voltage high), SPN 412 FMI 4 (EGR temperature voltage low), and SPN 2659 FMI 9 (EGR mass flow abnormal update rate).
What is the torque for X15 EGR cooler coolant fittings?
EGR cooler coolant inlet and outlet fittings torque to 37 ft-lbs (50 Nm) with thread sealant applied.