Buy Genuine Cummins EGR Valve for ISB 6.7 - wisentpartscenter.com

Description

Cummins 5473368RX EGR Valve - Genuine Cummins Exhaust Recirculation Valve Kit for ISB and QSB 6.7

The Cummins 5473368RX is a genuine EGR valve kit for EPA10 6.7L ISB and QSB engines. It mounts between the EGR cooler and the intake and controls how much exhaust gets sent back into the engine. An electric motor moves the valve and a built in sensor tells the ECM where it is sitting. Also sold as 2881693, 2881693RX, 5264518, 5271307, 5473368 and 5483012.

Key Functions:

- Controls how much exhaust goes back into the intake
- Electric motor with position feedback to the ECM

Fitment & Specifications:

- Cummins ISB and QSB 6.7L
- EPA10, roughly 2011 to 2014

Note: Verify fitment with us before ordering to ensure the correct part for your application.

Purpose of the Part

Exhaust that goes back through the engine has already burned, so it takes up space in the cylinder without adding heat. That drops peak combustion temperature, which is what keeps NOx down. The ECM decides how much to send back based on load, rpm and temperature, and this valve is what puts that number into practice. It runs off an electric motor with a position sensor built in, so the ECM is watching the actual valve position the whole time and will set a fault if it does not match what was commanded.

Issue Symptoms / When to Replace

Because this valve reports its own position back to the ECM, most failures show up as a mismatch between where the ECM told it to go and where it actually went. The motor works harder to move a sooted up valve, draws more current, and eventually either stalls out or burns up. That is the difference between this and an older mechanical valve, it will often set a fault before you notice anything wrong with how the truck drives.

Symptoms to look for are a check engine light with EGR position or performance faults, sluggish throttle, black smoke, rough idle, higher EGT, more frequent regens, and derate if it sits long enough.

Since the ECM is watching position and not flow, a wiring problem looks identical to a bad valve. Check the connector and harness first, then the EGR cooler and tubes for restriction and the delta P lines for soot. Short trips and long idle hours are what soot these up quickest.

A leaking EGR cooler is worth ruling out any time a valve plugs up. Coolant getting into the exhaust side turns soot into a paste that packs the valve solid, and it will do the same to a brand new one within a short time. If the valve you are pulling out is heavily plugged with wet residue rather than dry carbon, check the cooler before you order anything.

Brand Information

Cummins builds this valve to the flow the EPA10 emissions calibration was certified around, and the ECM is watching position feedback constantly. A valve that reads position differently or does not seat like the original will keep setting the same faults you were trying to fix, which is the usual complaint with cheap copies on this one.

Installation Notes

1. Find out why the old valve failed before you put a new one on. An internally leaking EGR cooler will let coolant into the system and plug the new valve the same way it plugged the old one.
2. Pull the air cleaner assembly and blower hose for access, then disconnect the electrical connectors, minding the connector locks.
3. Remove the mounting bolts and lift the valve out with its plate and gasket set.
4. Clean the intake manifold and all the EGR ports. Soaking the intake in solvent overnight breaks down the heavy carbon, then run a wire through every port to make sure they are clear.
5. Clean the tubes going to the EGR cooler and fit them with new gaskets.
6. Reinstall the intake with a new gasket. Anti seize on the bolts makes the next service a lot easier.
7. Install the valve with fresh O rings and gaskets and torque evenly.
8. Reconnect the harnesses and make sure the connector locks are seated.
9. Compare EGR differential pressure before and after to confirm the fix, then run a regen and road test it.

How to Identify an OEM Part

There is no one marking that makes it obvious, so compare the new valve to the one you pulled off. The motor housing, connector position and flange should match exactly. A genuine casting usually looks a little rough and dull, not polished and shiny. Aftermarket units tend to look too clean, and the shape or connector position ends up slightly off.

Why Buy 5473368RX From Wisent Parts Center?

  • 1 Year
    Warranty

  • Genuine Parts

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  • 30-Day Returns

    Conditions apply

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Warranty & Return Information
Warranty Information

Wisent Parts offers a 1-year warranty on all parts from the date of delivery. This warranty covers orders placed directly through our website. If a part fails during this period, we’re here to help - whether it’s a replacement, repair, or refund. For full details, refer to the Warranty page.

Return Information

Wisent Parts accepts returns within 30 days of delivery. All returns are subject to a restocking fee. To qualify, parts must be unused and in their original condition. For full return instructions and restocking fee details, please refer to the Returns page.