PACCAR MX-13 EGR Differential Pressure Sensor Housing Bolts
The MX-13 EGR differential pressure sensor housing mounts to the EGR cooler assembly. Proper torque ensures the housing seals correctly and prevents exhaust gas leaks. The sensor housing also contains the EGR temperature sensor on some configurations.
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 |
|---|---|---|
| Sensor Housing Mounting Bolts | 9 ft-lbs (12 Nm) | Use new gasket. Torque in a cross pattern. |
| EGR Pressure Sensor (if threaded) | 18 ft-lbs (24 Nm) | Apply anti-seize to sensor 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 PACCAR MX-13 EGR sensor housing bolts?
MX-13 EGR differential pressure sensor housing bolts torque to 9 ft-lbs (12 Nm) in a cross pattern with a new gasket.
Does the MX-13 EGR sensor housing require a new gasket?
Yes — always use a new gasket when reinstalling the EGR sensor housing to prevent exhaust gas leaks.
What fault codes are related to MX-13 EGR sensor issues?
Common related fault codes include SPN 412 FMI 3 (EGR temperature high), SPN 412 FMI 4 (EGR temperature low), and SPN 2659 FMI 9 (EGR mass flow abnormal).
What torque is used for the MX-13 EGR pressure sensor?
If the EGR pressure sensor is threaded directly into the housing, torque to 18 ft-lbs (24 Nm) with anti-seize on the threads.