Oil Temperature - Assistance Please
Thread Starter
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Mountain Pass
Joined: Oct 2004
Posts: 186
Likes: 1
From: New Mexico
Oil Temperature - Assistance Please
I just got my ScanGauge II today. I programmed in EOT and TFT, ECT was already there, as in degrees F WT. I ran around the block and read 202 ECT, 149 TFT, and 259 EOT. I went straight home and got out the IR Temperature gun. I shot the oil filter cap, oil filter housing, and oil pan and all read 205. Can someone who is NOT trying to trouble shoot a plugged oil cooler as I am please check their trucks with an IR gun at these locations when at operating temp and let me know what they see? Additionally, has anyone seen this with the ScanGauge II? Has anyone seen the temperature sensor reading off like this? Is this a pipe dream and my oil temp really was 259 degrees, riding around town empty, with ECT at 202?
Edit: thats 259 EOT!!!!!
Thanks,
Fred
Edit: thats 259 EOT!!!!!
Thanks,
Fred
Senior User
Joined: Jun 2009
Posts: 390
Likes: 0
From: ABQ
Yep, sounds like something is screwy. I don't see how the EOT can be so low compared to the ECT. How long was the engine running? Mine takes a while to for the EOT to match ECT, but only lags by a few degrees till fully warmed. that is reading with a SCII also. Flakey EOT sensor?
Thread Starter
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Mountain Pass
Joined: Oct 2004
Posts: 186
Likes: 1
From: New Mexico
Here are the parameters I used for EOT:
TXD=07E0221310
RXF=046245130610
RXD=3010
MTH=00090005FFD8
checked them 3 times. Drove probably 15 miles or so, the EOT just kept climbing. Got worried that it could actually be correct and went back to the house. Shot the 3 locations with the IR gun and all were 205, while the ScanGauge was reading 259.
TXD=07E0221310
RXF=046245130610
RXD=3010
MTH=00090005FFD8
checked them 3 times. Drove probably 15 miles or so, the EOT just kept climbing. Got worried that it could actually be correct and went back to the house. Shot the 3 locations with the IR gun and all were 205, while the ScanGauge was reading 259.
Lead Driver
Joined: Sep 2007
Posts: 8,180
Likes: 669
From: Scio, OR
The EOT sensor is somewhere in the oil passages in the engine valley. I wouldn't be a bit surprised to see internal oil temps of 259 with pan and cap temps much lower. The amount of heat radiated by the pan and cap are going to be less than the actual oil temperature. Really I see little value to using an IR thermometer on the pan or the filter cap.
Also, with a plugged oil cooler, an oil temp of 259 is not at all surprising. I've seen threads from members with oil temps a lot higher than that.
Also, with a plugged oil cooler, an oil temp of 259 is not at all surprising. I've seen threads from members with oil temps a lot higher than that.
Thread Starter
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Mountain Pass
Joined: Oct 2004
Posts: 186
Likes: 1
From: New Mexico
Yes, that's why I hit Edit, and stated Edit: 259 EOT. Sorry for the confusion. Trying to determine the real temp. I can't see how the oil temp can be that much higher than a normal coolant temp. Additionally, the IR gun, at numerous points of inspection, shows a completely normal temperature. Again, sorry for the confusion.
Freshman User
Joined: Mar 2010
Posts: 35
Likes: 0
From: Monroe, NC
Here are the parameters I used for EOT:
TXD=07E0221310
RXF=046245130610
RXD=3010
MTH=00090005FFD8
checked them 3 times. Drove probably 15 miles or so, the EOT just kept climbing. Got worried that it could actually be correct and went back to the house. Shot the 3 locations with the IR gun and all were 205, while the ScanGauge was reading 259.
TXD=07E0221310
RXF=046245130610
RXD=3010
MTH=00090005FFD8
checked them 3 times. Drove probably 15 miles or so, the EOT just kept climbing. Got worried that it could actually be correct and went back to the house. Shot the 3 locations with the IR gun and all were 205, while the ScanGauge was reading 259.
Check your MTH value again, according to the code sheet at http://www.scangauge.com/support/pdfs/XGAUGE.pdf the Oil Temp
MTH=00090005F05F
The value you have is for Manifold Air Temperature (MAT).
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Thread Starter
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Mountain Pass
Joined: Oct 2004
Posts: 186
Likes: 1
From: New Mexico
Well, that may just answer it then. I'll check when I get home. I got those parameters here, and on a sheet I found on another list..........
Thanks for that.
Thanks for that.
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Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 25
From: Middle Tn.
Another check you can do is let the truck set over night and when you 1st lite the truck off the eot, ect and tft should all be within a degree or two of each other. If not there is a sensor or math problem involved.
Thread Starter
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Mountain Pass
Joined: Oct 2004
Posts: 186
Likes: 1
From: New Mexico
RedEagle58,
Thanks for the reality check, apparently that was the problem.
69cj,
Once I got the correct parameters in the ScanGauge II ECT, EOT, and TFT were all within about 1.5 degrees prior to engine start. Now I get to install the oil cooler that will be arriving on the 'Big Brown Truck' as the differential is a tad high.
Thanks again for the assistance,
Fred
Thanks for the reality check, apparently that was the problem.
69cj,
Once I got the correct parameters in the ScanGauge II ECT, EOT, and TFT were all within about 1.5 degrees prior to engine start. Now I get to install the oil cooler that will be arriving on the 'Big Brown Truck' as the differential is a tad high.
Thanks again for the assistance,
Fred
Freshman User
Joined: Mar 2010
Posts: 35
Likes: 0
From: Monroe, NC
No problem, just glad it was something that simple. 
I don't know how many times I messed up entering in the codes for what I wanted to monitor.
____________________________
Vic
2006 F250 6.0, CC, Lariat, High Idle mod, Dieselsite coolant filter, ScanGauge II
I don't know how many times I messed up entering in the codes for what I wanted to monitor.____________________________
Vic
2006 F250 6.0, CC, Lariat, High Idle mod, Dieselsite coolant filter, ScanGauge II
