ECT/EOT in cooler weather
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ECT/EOT in cooler weather
Just got a scangauge so definitely a new guy to all the values. I understand that you should probably not judge your delta on the ECT/EOT issue until your coolant gets to 190F. Is that the standard to judge on? Having never monitored these values before, I sit around 175F after a 20 minute or so drive, but it has been cool for Tucson lately, maybe that is impacting that number. It is the original thermostat also.
I'm hitting easy street
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That is pretty low on the ECT. It takes my temps to normalize after about 15 miles at highway speeds. And, my temps going to work right now is hovering around 30*f. And my temp will reach and hang at 190*. My EOT runs up to 195*
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From: ct
My trucks coolant was running 176 to 183 depending on outside temp. last weekend i changed out the thermostat and now it runs 189 to 190
With the old or new thermostat once the coolant temp. stabilized the oil temp. was within 4 degrees of the coolant temp.
With the old or new thermostat once the coolant temp. stabilized the oil temp. was within 4 degrees of the coolant temp.
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I have been driving in mid40s temps so the lower ECT is a reflection of the thermostat probably. The delta has been good, within 8 max.
Not being smart enough to know the effects, is the low ECT enough to say change the thermostat, and why would that be beneficial?
Not being smart enough to know the effects, is the low ECT enough to say change the thermostat, and why would that be beneficial?
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From: L.A. (Lower Alabama)
I knew mine was running a little cool but going to work this morning (28*) ECT maxed out at 175*. New thermostat for me this weekend.
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Diesels have no spark plugs and therefore rely on compression and heat for detonation once the glow plugs turn off. Ideal operating temps for the 6.0 is 190 to 204 range cruising on level ground after 15 to 20 miles on the highway. Lower temps can affect mileage, performance and emmissions. They can also cause carbon build up which can affect other vital components.
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Looks like were Both gona have some FUN
this weekendAnd even though my temps have been arpound 173- 175 ECT my oil cooler is still 178- 180 EOT
The ECT vs EOT should be nice and tight regaurdless of ambeint temp or bad thermistate
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So I took it out for a test run, about 15 minutes running 75-80mph on the freeway after about a 10 minute warmup getting to the freeway. Mostly sat around EOT 192, ECT 182, both would drop some to 187-189 and 177-179, that was it. 60F outside...
So I guess a thermostat is in order, any other comments with that spread? I was thinking safety so I didn't stare down the Scangauge but there may have been one time with a spread of 12.
So I guess a thermostat is in order, any other comments with that spread? I was thinking safety so I didn't stare down the Scangauge but there may have been one time with a spread of 12.
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From: L.A. (Lower Alabama)
So I took it out for a test run, about 15 minutes running 75-80mph on the freeway after about a 10 minute warmup getting to the freeway. Mostly sat around EOT 192, ECT 182, both would drop some to 187-189 and 177-179, that was it. 60F outside...
So I guess a thermostat is in order, any other comments with that spread? I was thinking safety so I didn't stare down the Scangauge but there may have been one time with a spread of 12.
So I guess a thermostat is in order, any other comments with that spread? I was thinking safety so I didn't stare down the Scangauge but there may have been one time with a spread of 12.
You read my mind rusty stopped by Ford 2day and picked up an OEM thermistate Looks like were Both gona have some FUN this weekend
And even though my temps have been arpound 173- 175 ECT my oil cooler is still 178- 180 EOT
The ECT vs EOT should be nice and tight regaurdless of ambeint temp or bad thermistate
Looks like were Both gona have some FUN this weekendAnd even though my temps have been arpound 173- 175 ECT my oil cooler is still 178- 180 EOT
The ECT vs EOT should be nice and tight regaurdless of ambeint temp or bad thermistate
) . Might be interesting to compare temps next week sometime and see if there's a difference
Last edited by Rusty Axlerod; Dec 9, 2011 at 07:48 PM. Reason: Add
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From: ct
So I took it out for a test run, about 15 minutes running 75-80mph on the freeway after about a 10 minute warmup getting to the freeway. Mostly sat around EOT 192, ECT 182, both would drop some to 187-189 and 177-179, that was it. 60F outside...
So I guess a thermostat is in order, any other comments with that spread? I was thinking safety so I didn't stare down the Scangauge but there may have been one time with a spread of 12.
So I guess a thermostat is in order, any other comments with that spread? I was thinking safety so I didn't stare down the Scangauge but there may have been one time with a spread of 12.
Lead Driver
Joined: Feb 2011
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From: L.A. (Lower Alabama)
According to the TSB the ECT should be at 195* when taking the measurements but spread should be 15* or less. 30* difference between oil and coolant temps is not good. You can try flushing the coolant system. It has helped some trucks reduce the spread and really should be done anyway before changing the clogged up oil cooler. Many guys do an EGR delete or an aftermarket EGR cooler at the same time, unless you have the early ('03-'04) round EGR cooler. Driving the truck with the oil cooler clogged up reduces coolant flow to both EGR and oil cooler an one or the other may fail. Oil cooler failure allows oil into the coolant system and makes a big mess and a lot more work to repair. EGR cooler failure allows coolant into the intake and causes steam out the tail pipe, overheating, head gasket failure and can hydrolock the engine by filling a cylinder with coolant. Starting a hydrolocked engine can bend connecting rods and cause sever engine damage.
I would flush it ASAP and see if that helps ( it may not).
I would flush it ASAP and see if that helps ( it may not).