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Unread 06-15-2009, 12:23 PM   #1
wookiee
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CRD Underhood Temps

I bought a dual probe temperature gauge and attached one on the manifold bracket with the probe itself hanging 1/4" off the metal. The other probe is attached just under the hose going to the Provent but directly over the exhaust pipe (about 12" of air between the hose and pipe.)

Preliminary temps at city speeds are as follows. All F

Ambient EGT Manifold Hose Speed

84 460 180 150 Idle
77 900 137 116 40
77 900 125 109 40
74 590 179 143 Idle

The temp at the manifold is less than 1/2 the EGT.
I doubt if the temp rises at all during regen since the DPF is below the passenger seat. I have another 500 miles to go before the next regen and will report the temps. I'll also try to get a probe right on the DPF to see how hot the exterior gets during regen.

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Unread 06-15-2009, 12:37 PM   #2
DarrylFlynn
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Quote:
Originally Posted by wookiee View Post
I bought a dual probe temperature gauge and attached one on the manifold bracket with the probe itself hanging 1/4" off the metal. The other probe is attached just under the hose going to the Provent but directly over the exhaust pipe (about 12" of air between the hose and pipe.)

The temp at the manifold is less than 1/2 the EGT..
I am not trying to be funny or sarcastic BUT Is there some point to this? What exactly are you hoping to achieve?
I have a CRD and perhaps naively thought that this type of work would have been done prior to the vehicle ever being manufactured. I am certainly unaware of any issue with the vehicle having unacceptable under bonnet temperatures and bearing in mind it is a vehicle designed to be used off road in arduous conditions, surely this has been done at the development stage.

Cheers Darryl
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Unread 06-15-2009, 03:37 PM   #3
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Quote:
Originally Posted by DarrylFlynn View Post
Is there some point to this?

Cheers Darryl
Point
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Unread 06-15-2009, 04:26 PM   #4
DarrylFlynn
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Well it looks like the response is about as useful as the project. Ho Humm!
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Unread 06-16-2009, 05:22 AM   #5
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Post your findings, I for one would like to know. We never park our jeep when its regening, I'm sure its fine, but man there is some serious heat coming off of it. We reset our miles, and keep track of the regens, and make sure we drive a few miles after regen before we park it.
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Unread 06-17-2009, 10:54 AM   #6
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How can you tell when it goes into regen without an EGT gauge?
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Unread 06-17-2009, 11:32 AM   #7
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How can you tell when it goes into regen without an EGT gauge?
In his sig it states he has the DashHawk with EGT gauge
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Unread 06-17-2009, 03:40 PM   #8
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Ah! Well, that would do it. I have a Scangauge, but it doesn't read EGT.
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Unread 07-30-2009, 09:27 AM   #9
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More info to waste DarrylFlynn's precious time...

At 90 OAT..
The temps at idle are 160 and 150
At idle and regenerating it goes up to 265 and 196, hardly enough to cause a fire from oil vapor.
At 80 mph the temps are 124 and 77
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Unread 07-30-2009, 09:29 AM   #10
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Originally Posted by chadhargis View Post
Ah! Well, that would do it. I have a Scangauge, but it doesn't read EGT.
The dashhawk also gives me cat1b1 temp reading which is the dpf, so you don't need the egt if you can read cat1b1
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Unread 08-11-2013, 10:01 AM   #11
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What are the max EGT temps when in heavy load?
Any one measured while in full throttle?

Thanks
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Unread 08-12-2013, 12:13 PM   #12
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All I know is the exhaust is hot enough to sting my feet from the tailpipe after a hard tow and I'm unhooking my trailer wearing flip flops!
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Unread 08-12-2013, 01:20 PM   #13
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I'm reading cat1b1 via Torque - I have seen over 900F while the ambient temp was about 105F, cruising @ 65

I'd have to go back to my logs, but I think that's as hot as it ever got
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Unread 08-12-2013, 01:36 PM   #14
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I asked because in stock form (with EGT probe before turbo) I'm reading 850C (~1560F) and don't even want to know how much with a tunned ECU!

Offcourse this is before turbo, but after, at the exhaust Cat's I'm reading only 650C (1200F) max

PS: garret says that turbo works with 830C (1526F) and new ball bearing turbo is up to 860C (1580F)
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