EGR valve question: anyone have experience?

[Düsseldorfer]

I went to the dealer today to get a new gasket for the EGR valve in my '08 3.0L. It turns out that the parts book shows both the metal base gasket and an o-ring. The replacement o-ring provided is a green Viton (hard rubber) item. When I removed my EGR valve, as detailed in another thread, there was no o-ring.

Are there any experienced techs on the board who can say whether the o-ring should be installed? (Doktor?)

Does it only go with certain versions of the EGR assembly? I have heard the valve itself has been updated perhaps twice, though I haven't independently confirmed that.

Was it deleted from later production engines? Or should it be present on all?

Any guidance would be appreciated.

Regards,
D


PS- I wanted to break this question into its own thread so as to keep the 'hesitation' thread a little cleaner. I think when all is said and done I can post a how-to on EGR R&R.

[jdcaples]

EPC-EGR-Anatomy.JPG

The above picture is a screen shot from the MB USA, LLC Electronic Parts Catalog (EPC).

My Sprinter's engine is an OM642.993. There are are 23 variants of OM642 in the MB USA, LLC EPC). The OM642.993 is listed, and the picture illustrates parts for the OM642.993.


To be clear, the MB USA, LLC EPC doesn't list an o-ring as part of the EGR anatomy for OM642.993.

The Chrysler Service Manual CD content covering EGR remove and replace procedures doesn't mention an o-ring... it only says, "discard the gasket."

I think you've stumbled upon a mystery that may turn out to be non-trivial.

Using the picture above, can you indicate where the o-ring is supposed to go?

-Jon

[abittenbinder]

Originally Posted by Düsseldorfer

I went to the dealer today to get a new gasket for the EGR valve in my '08 3.0L. It turns out that the parts book shows both the metal base gasket and an o-ring. The replacement o-ring provided is a green Viton (hard rubber) item. When I removed my EGR valve, as detailed in another thread, there was no o-ring.

Are there any experienced techs on the board who can say whether the o-ring should be installed? (Doktor?)

Does it only go with certain versions of the EGR assembly? I have heard the valve itself has been updated perhaps twice, though I haven't independently confirmed that.

Was it deleted from later production engines? Or should it be present on all?

Any guidance would be appreciated.

The various years parts diagrams have numerous errors. I suspect this o-ring sneaked in from the Jeep's WK application (which has its own unique EGR valve design). Doktor A

[jdcaples]

Originally Posted by abittenbinder

The various years parts diagrams have numerous errors. I suspect this o-ring sneaked in from the Jeep's WK application (which has its own unique EGR valve design). Doktor A

I figure Andy's right, but honestly, I was hoping for so much more....

Here's a pic of an OM642.950's EGR parts... does the o-ring look like 122?

OM642960egr.JPG

-Jon


PS: I don't know which of the (at least 23 variants of the) OM642s are running round in Jeep WK bodies.... it wasn't hard to find an o-ring, though....

[abittenbinder]

Originally Posted by jdcaples

I figure Andy's right, but honestly, I was hoping for so much more....

Here's a pic of an OM642.950's EGR parts... does the o-ring look like 122?

PS: I don't know which of the (at least 23 variants of the) OM642s are running round in Jeep WK bodies.... it wasn't hard to find an o-ring, though....

Bingo. That's the Jeep's tulip valve EGR valve and there's the o-ring. Doktor A

[jdcaples]

Thank you, Doktor A!

Düsseldorfer,

The part number in EPC for my (and probably your) OM642.993 is revealed: A 642 140 17 60.

My EGR housing as two upside down triangles in place of the "17," but all the other numbers match.

Andy and the EPC have confirmed you don't need the o-ring.

So in my mind, only one other question remains:

Will the gasket they gave sold to you actually fit?

-Jon

[Düsseldorfer]

Part # for the gasket: A 642 142 23 80 / 68014085AA
Part # for the o-ring: (no MB part on the package) / 68001387AA

The gasket is correct. The o-ring does look like #122 in the pic-- but then, any o-ring would look like that.

The parts guy originally pulled up the wrong EGR application, possibly the Jeep (not sure) but nothing at all like the Sprinter. He was very insistent that it was the Sprinter diagram; finally I pointed out that only one of us had been under the hood of an '08 Sprinter, and it was not him.

When he got a second diagram that actually had the Sprinter EGR installation pictured, it did show both the gasket and o-ring. I remember that in the diagram the o-ring was #19 and the gasket #20, if that might help track down which diagram we looked at.

Maybe the o-ring wouldn't hurt, but I'm going to skip it. That said, I'd be interested to know if anyone out there found an o-ring under their EGR valve.

Thanks,
D

[Düsseldorfer]

Some quick Googling turned up the following:

EGR.JPG

You can see the o-ring and gasket are #19 and #20 respectively. So is this an error?

[abittenbinder]

Originally Posted by Düsseldorfer

Maybe the o-ring wouldn't hurt, but I'm going to skip it. That said, I'd be interested to know if anyone out there found an o-ring under their EGR valve.

Yes, it will hurt. Did you read my previous reply?

"The various years parts diagrams have NUMEROUS errors. I suspect this o-ring sneaked in from the Jeep's WK application (which has its own unique EGR valve design)." Doktor A

[Düsseldorfer]

Originally Posted by abittenbinder

Yes, it will hurt. Did you read my previous reply?

"The various years parts diagrams have NUMEROUS errors. I suspect this o-ring sneaked in from the Jeep's WK application (which has its own unique EGR valve design)." Doktor A

Due respect, Doc, but you did not say definitively that the o-ring does not go with the Sprinter EGR. It seems that's what you meant to say. Right?

"The various years' parts diagrams have numerous errors, and this is one of them, because the Sprinter application has never used an o-ring." Or, "I suspect this o-ring sneaked in from the Jeep's WK application, because the Sprinter application has never used an o-ring." Is that what you were saying? That you are quite sure?

Thanks again for all the help, guys.

Regards,
D