Paccar PX8 DOC 2008-2010

Emissions Control for PX8 Engines – Paccar PX8 DOC (2008–2010)

What is it?
The DOC (Diesel Oxidation Catalyst) for Paccar PX8 engines built between 2008 and 2010 is an exhaust aftertreatment component that oxidizes hydrocarbons (HC) and carbon monoxide (CO) in the exhaust gas before they move on to downstream filters or catalytic units.

Why choose this OEM DOC?
This DOC is manufactured to meet Paccar’s original design specifications. It ensures optimal flow dynamics, correct backpressure, and durability. A genuine or properly matched DOC helps prevent diagnostic faults, flow restrictions, excessive backpressure, or early failure common with substandard replacements.

Key Benefits
 ✅ Direct‑fit for Paccar PX8 engines (2008–2010)
 ✅ Efficient oxidation of HC & CO in the exhaust stream
 ✅ Maintains proper exhaust flow and limits backpressure
 ✅ Built to withstand high temperatures and strenuous conditions
 ✅ Fully compatible with factory emission systems and diagnostics

Applications
Used in Paccar trucks and machinery running PX8 engines from 2008–2010. The DOC forms a key stage in the emissions control chain, helping reduce upstream pollutants before gases enter particulate filters or catalytic converters.

Installation Notes
Installation should be performed by a qualified technician. Ensure the exhaust system is completely cool before removal. Take off the existing DOC and carefully preserve sensor connections. Clean mating flanges and inspect surfaces. Replace any worn gaskets or seals. Install the new DOC with correct alignment and torque fasteners to Paccar specs. Afterward, check for leaks, confirm exhaust flow, and clear any emissions‑related fault codes using diagnostic tools.

Final Thoughts
If your PX8 engine is showing emissions faults, poor exhaust performance, or elevated smoke levels, replacing the DOC with the correct factory-spec unit for 2008–2010 helps restore system integrity. A proper DOC supports cleaner emissions, protects downstream components, and maintains reliable, compliant engine operation.