Installing EGT probe on 2008 6.7L

[hwebster]

Thanks to Piers, I've just received an EGT to add to my Edge Insight. I believe on the 2008 6. 7L with Jake Brake there is a port built into the Jake for the insertion of the EGT. The instructions don't reference the 2008. Does anyone have a picture or schematic that shows the location of the port?



Harrison



BTW I am happy with the Insight, still throwing P:0128 Codes (Thermosat Rationality) and it clears them. I might try some Valium if the Thermosat stays irrational!

 

[nickleinonen]

i think the exhaust brake on the 6. 7 is just a software change along with a switch. . i don't think there is a butterfly valve after the turbo like on the 5. 9 models. unless there is a port somewhere along the exhaust manifold or turbo turbine section, your gonna be drilling. .

 

[hwebster]

Port on Jake Brake

The Jacobs site indicates a port for the installation of the EGT probe but no schematics... Guess I'll have to keep feeling around...

 

[hwebster]

There IS a port on the Jake for the EGT Probe!

Oo. This is from the Jacobs Support Desk. .



On the 2004. 5 and later exhaust brake, there is a pyrometer port On the underside of the brake, between the turbo and the brake butterfly valve. There is a 1/4- 18 NPTF plug in the housing at the pyrometer port. This location allows the temperature to be monitored with the probe located away from the actual butterfly valve. I hope that this helps. Thanks for the inquiry.

Regards,

 

[Cattletrkr]

Oo. This is from the Jacobs Support Desk. .

On the 2004. 5 and later exhaust brake, there is a pyrometer port On the underside of the brake, between the turbo and the brake butterfly valve. There is a 1/4- 18 NPTF plug in the housing at the pyrometer port. This location allows the temperature to be monitored with the probe located away from the actual butterfly valve. I hope that this helps. Thanks for the inquiry.
Regards,

Have you found it yet? Good luck. The exhaust brake on a 6. 7L is built into the turbo. There isn't any physically separate "brake" and no butterfly valve.

 

[JBonpua]

What size drill do I use for a 1/4- 18 NPTF tap?

 

[HBarlow]

Folks, I initially thought the exhaust brake on the new 6. 7L engines was a function of the turbo as you are saying but I no longer think that is correct. I think many of us must have read something that led us astray before the trucks were delivered to dealers.



If you look at the new truck brochures you will see that it is a separate butterfly valve device just like all of them have been.



The eb on the new trucks sounds and functions just like the older ones also.



Harvey

 

[hwebster]

Jake on 6.7L

The churn is a concern, so I've resubmitted my question to the Jacobs support desk asking for clarification and a schematic if possible. Will let you know what I find out!



H

 

[hwebster]

The Winner is Cattletrkr ..

Clarification from Jacobs...



Harrison,

The 6. 7 liter engine is equipped with a VGT turbo, which can function as a braking device, so we do not make a product for that application. That option is available through Mopar. The 2007

5. 9 liter engine has a fixed geometry turbo and will accept the exhaust brake. Sorry for the confusion.

Thanks for the inquiry.

Regards,

JVS Tech Support





Thanks Cattletrkr you were on the money! Gonna have to make some hole!

 

[HBarlow]

This is strange. I guess I was wrong.



I reviewed an old '07 Cummins ISB brochure, distributed by Cummins for the engine installed in MDTs. It includes a line referring to the VGT and says that the VGT can double as an exhaust brake. I remember reading that a year or so ago and that is why my original understanding was that the old butterfly valve exhaust brake was no longer used and a VGT provided exhaust braking.



We are talking about Dodge applications and I have scanned several different versions of them on a number of occasions. I guess that is where my "understanding" that the Dodge application utilizes a separate butterfly valve exhaust brake came from. The above reply from Jacobs refers to a MOPAR option.



Here is a quote from the "2008 Dodge Ram" brochure:



"9 FACTORY INSTALLED EXHAUST BRAKE

Another advantage to the current Cummins design in Dodge Ram: it's the first time an exhaust brake is installed at the factory. Utilizing the exhaust to aid braking power results in a number of significant advantages, including longer brake life, faster cab warm-up, and greater vehicle control. "



And this which makes the issue more confusing to me:



From the "2008 Dodge Commercial Vehicles and Programs" brochure.



"STANDARD EXHAUST BRAKE

One of the established advantages to diesel engineering is the exhaust brake. On the 6. 7L Cummins Turbo Diesel for Ram, the exhaust brake is factory-installed during production, a step that ensures outstanding reliablilty. The Cummins design works with the Variable Geometry Turbocharger and offers multiple assets: reduced brake fade, longer brake life, faster cab warmup, and greater control over the vehicle. "



Since I read the reply from Jacobs quoted above and then reviewed all the brochures I have again I think I was wrong. The Ram application and factory installed equipment must be only the switch and external controls that allow the driver to turn the exhaust brake function on or off but it uses only the VGT to perform braking.



Harvey

 

[hwebster]

I think you are right Harvey. Even the Jacobs guys were a little confused. The Jake for the 5. 9L is a Jacobs product, installed as an aftermarket option. The 6. 7L installed brake used the VGT to provide the braking.



What that means is that Cattletrkr is right, I'll have to do some drilling to install the EGT probe...



(Where are the aliens when you need them!)



Cheers...

 

[Cattletrkr]

To be fair, Nick beat me to it.

 

[hwebster]

You're right but since there isn't really a prize other than appreciation for this online community, there is plenty to go around!!



Now to sift thru the forums and plan the install!! Thanks again!!



H

 

[nickleinonen]

You're right but since there isn't really a prize other than appreciation for this online community, there is plenty to go around!!

i am the weiner... first rounds on me. . :-laf





as for drilling...



1/8"npt is "R" or 0. 3390" [i personally use either 5/16" or 11/32" - R is between them]

1/4"npt, you need a 7/16" hole [0. 4375"]



handy drill and tap chart

 

[gsbsparky]

I am looking at doing the same in my 08 and would like to know if anyone has drilled yet and where they did?

 

[hwebster]

The Edge Documentation for the Juice/Attitude has some good pictures

Just go to the Edge site and look at the documentation for installing the EGT...



H