DEF Doser Valve

[JimT]

So, like many with these SCR systems I've reached the point where I need to replace my DEF Doser vavle/injector. I have a 2012 Pete 587 with Cummins ISX cm2250.

This particular valve/injector is used on MANY different engine/aftertreatment systems. Most Cummins ISX engines with SCR and many (all?) PACAR engines utilize the same Cummins aftertreatment system. OEM for this valve is Bosch. There's a few slight variations so double check what part number your truck requires.

Pricing this out showed costs ranging from $300-$500 for new OEM parts. A little more digging however turned up a lot of no name valves that looked identical to the OEM but cost 1/10th the price! So, after a little research I decided $45 was worth experimenting on one of these no-name valves. Worst case I end up replacing it with an OEM one and I'm out $45 and 30 min of my own labor. So I ordered one from Amazon with Prime shipping and got it in today.

Here's what I found when I opened the box:
   
   

It appears to be an actual OEM part with electrical tape covering the markings. Again, purchased through Amazon with Prime shipping. Not sure how the part actually came to be, but it was NOT advertised as being OEM.

So, we will see how it actually works. I still had to get the gasket/spacer from the dealer/OEM so once that comes in I will install and report back. If it turns out to be complete junk I will be happy knowing that others can learn. Otherwise, it could be a great value find in what is typically an expensive system to maintain. Even if it only lasts about a year, it's still cheaper than some of the sensors that we would replace for an EGR tune-up.

Stay tuned...