EGT Probe Locations...
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Freshman User
Joined: Jun 2007
Posts: 39
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From: Castle Rock, CO
EGT Probe Locations...
So...I installed my gauges, got the tranny whammy'd, INSTALLED THE DP YESTERDAY!!!! Too bad the weather isn't conducive to really driving this thing. 
I officially have the bug!
Now, aside from the compressor surge issues to work on, and the remaining list of to-do's that won't ever be complete, I was told I have placed my EGT probe in the wrong place. I clamped it in about 4" down from the turbo on the downpipe. I understand there can be quite a discrepency between pre-turbo and post-turbo temps, and there may be a little lag in temperature gauge response on the downpipe. My question is whether or not it's actually necessary to move the probe. If I allow for the fact that the gauge is reading post-turbo, and there may be a little lag in readings, is it really necessary? And with that, I've heard that sustained temps in the 1400-1500 degree range WILL be detrimental, if I watch for greater than 1000 degrees, and back off if I get close, will I be safe enough? I'm certainly not drag racing or anything. I'm towing about 10k in the 5th wheel and just want to be able to pull the hills without impeding traffic or turning on the 4-ways.
I appreciate the thoughts and input...this site is the best!
still plays with trucks
Joined: Mar 2004
Posts: 1,743
Likes: 3
From: Twin Falls Idaho
I second what Ron said. It need to be Pre Turbo as close to the engine as possible. Drivers side exhaust manifold just as it stars to bend. 7/16 drill and 1/4 pipe tap. its easy to get to and the most accurate. By the way I'm just down the road from you today, in Colo Springs. Nice weather Huh? Barney
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Freshman User
Joined: Jun 2007
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From: Castle Rock, CO
So, I could simply move it to the up-pipe, between the manifold and the turbo and clamp it in?
And PMS? P? Modification Syndrome? Sorry...I'm used to the F.A.A.T. List...the FEMA Abbreviations and Acronyms Text, and other glossary-type publications!
And PMS? P? Modification Syndrome? Sorry...I'm used to the F.A.A.T. List...the FEMA Abbreviations and Acronyms Text, and other glossary-type publications!
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Freshman User
Joined: Jun 2007
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From: Castle Rock, CO
I second what Ron said. It need to be Pre Turbo as close to the engine as possible. Drivers side exhaust manifold just as it stars to bend. 7/16 drill and 1/4 pipe tap. its easy to get to and the most accurate. By the way I'm just down the road from you today, in Colo Springs. Nice weather Huh? Barney
Post Fiend
Joined: Jun 2006
Posts: 9,714
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From: White Mnt's,New Hampshire
sorry again lol left ya a good link in the other thread to help you out..(fixed it in red above in your quote)
still plays with trucks
Joined: Mar 2004
Posts: 1,743
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From: Twin Falls Idaho
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Freshman User
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From: Castle Rock, CO
Alright...just so I'm clear then: I move the probe, get it closer to the engine. What temps am I looking for?
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Post Fiend
Joined: Jun 2006
Posts: 9,714
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From: White Mnt's,New Hampshire
you can hold 1250 max you can go above but only in short burst like doing drag runs..if you put it in the manifold..start with a sharp small bit and work your way up..I magnetized my drill bits before I used them to hold most of the shavings..when i was done drilling i stuck the small bit up in to catch what the last bit didnt get...
still plays with trucks
Joined: Mar 2004
Posts: 1,743
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From: Twin Falls Idaho
Keep it under 1100 and you'll be fine. short burst over that are alright but not recommended. Remember higher RPM= more exhaust flow=lower EGT. glad you're moving the probe. you're 7.3 will thank you. Barney
Post Fiend
Joined: Jun 2004
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From: Parker, CO
Mike, like the others have said, put the probe before the turbo. Either the manifold or up-pipe is perfectly fine. But definately get it out of the downpipe, it's not doing any good there.
If you ever need any help, I'm only about 15 minutes away from you. Heck, if you want the probe in the manifold, I have the tap for it.
If you ever need any help, I'm only about 15 minutes away from you. Heck, if you want the probe in the manifold, I have the tap for it.
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Freshman User
Joined: Jun 2007
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From: Castle Rock, CO
Thanks, Curtis...I've actually kinda been waiting for you to post here. I've read many of your most recent replies to other threads and am very impressed with your knowledge. And the fact that you're just down the road, certainly helps!
I actually work right over by the Harbor Freight in Littleton, so I just bought the right pipe tap. I'm hoping to get this changed before our trip to Phoenix, but this weather has really put a damper on my Pre-Vacation-Honey-Do-List, so the 5W isn't even ready yet.
Is the up-pipe thick enough to take a tap? or do I need the weld-in fitting? And if I go to the manifold, is there a particular place that's better? or one to stay away from?
Someday, I'll learn all the fine details of this engine!
I actually work right over by the Harbor Freight in Littleton, so I just bought the right pipe tap. I'm hoping to get this changed before our trip to Phoenix, but this weather has really put a damper on my Pre-Vacation-Honey-Do-List, so the 5W isn't even ready yet.
Is the up-pipe thick enough to take a tap? or do I need the weld-in fitting? And if I go to the manifold, is there a particular place that's better? or one to stay away from?
Someday, I'll learn all the fine details of this engine!
Lead Driver
Joined: Jan 2007
Posts: 6,708
Likes: 5
From: Kiowa CO
Here's the location in the manifold. Click on photos #22 & #23
Gauge Installations at DieselManor- 1999-2003 7.3L Powerstroke
I have the clamp-style probe and it's been just fine for three+ years now.
I nominate Curtis as well to help you out!
Actually, I'm up the road also and if you need a hand, let me know. 
Gauge Installations at DieselManor- 1999-2003 7.3L Powerstroke
I have the clamp-style probe and it's been just fine for three+ years now.
I nominate Curtis as well to help you out!
Actually, I'm up the road also and if you need a hand, let me know.