EOT and ECT

[dagnabit9]

I've just installed the ScanGauge II in my truck and programmed it for the EOT in the XGauge feature. I drove it into town (about 8 miles one way) and back and the coolant never rose above 183 degrees but the oil temp went up to 215 degrees. Intake air temp was about 80 degrees. I'm thinking I have a problem but what? Help..??!!!

[20046.0]

Stuck T-stat and a failing oil cooler.

[xu67585]

^^^ exactly. I had the same issue. Replaced both, flush and ELC fill. 194/194 now.

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[colo_dually]

You will need a new oil cooler at a minimum, even with the EGR delete, you can still find yourself in receipt of an oil cooler rupture if you don't address the problem soon.

Flush (restore and restore plus), rebuild/replace the oil cooler, refill with silicate-free ELC, and enjoy the truck worry-free of this situation reoccurring.

[amdriven2liv]

Originally Posted by dagnabit9

I've just installed the ScanGauge II in my truck and programmed it for the EOT in the XGauge feature. I drove it into town (about 8 miles one way) and back and the coolant never rose above 183 degrees but the oil temp went up to 215 degrees. Intake air temp was about 80 degrees. I'm thinking I have a problem but what? Help..??!!!

Let it sit over night and check the gauges again. Make sure they are within a degree or two of each other before you start buying parts.

That is a good place to start. They should be close to ambient temps after a 12 hour sit.

Then you can go from there.

[dagnabit9]

Guess I should've mentioned...cooling system has been flushed already, truck has 149,000 miles on it and no puking, and EGR delete was done in the spring. What's the average mileage before an oil cooler needs to be replaced?

[colo_dually]

Flushed already, was it before or after you rebuilt/replaced your current oil cooler?

Oil Coolers last a lot longer on silicate-free ELC (Cat EC-1 rated), since there isn't anything that will gel and clog the cooler (no set mileage).
On Ford Gold, you flush every 50K, and therefore rebuild the oil cooler at the same time.

[dagnabit9]

Please bear with me, this is my first diesel truck and I am a bit ignorant of all the parts that make up a (this) diesel engine - my forte used to be gas engines. That being said, I don't think the oil cooler has ever been replaced or rebuilt, at least they've never said anything to me at the dealership - the EGR delete was done by my diesel mechanic at a local shop (I suppose I could ask him though, eh?). Are they using coolant to cool the oil, much like the EGR setup, or air? How easy/hard is it to get at the oil cooler?

[Snake]

Yessir, the 6.0 uses coolant to cool the oil via an oil cooler. These often clog due to silicates in the coolant falling out of suspension or the cooling system picking up left over casting sand in the block. When they clog, you'll see the oil temp higher (15* or more) than the coolant temp. If you've wrenched on gassers, replacing the oil cooler isn't too bad. I think I remember reading that its a 6 hour job.

[dagnabit9]

Ok, I'm going to ask this question to the forum (as I will be asking the guy that did my EGR delete): Why would any respectable mechanic do an EGR delete and NOT do the oil cooler replace/rebuild? I mean, you're already in there - why not?