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Old 04-12-2012, 05:12 PM
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Oil Temp Issue

Hello everyone! I have a 2008 f350 srw 4wd, dfp/cat delete spartan 210 tune, 5" exhaust, afe intake. It has had the radiator changed by dealer 2 times they also installed new egr valve and so forth. all under warranty. Today for the first time i saw a Huge difference in my oil temp compared to my coolant. What could cause sudden oil temp rises? Normall driving conditions and it was anoud 75 degrees here today.. i wasn't getting into the peddle at all just crusin. factory gauges were normal but the dasdaq told me different oil temp was over 210 and coolant was 198-205, i checked the oil level and condition its about 2500 miles old and level was correct.

any info will be greatful!
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Old 04-12-2012, 06:31 PM
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Sensor is bad or oil cooler is clogged.
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Old 04-12-2012, 06:47 PM
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My EOT runs about 4 degrees over ECT. Which I'm told is about normal. What was your EOT before today? I would think a sudden change would indicate a bad sensor, but I don't know what happens when a cooler plugs.
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Old 04-13-2012, 04:17 AM
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Has anyone changed the sensor? And or the cooler? is it possible to unclog the cooler? also where is the sensor located?

Thanks!
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Old 04-13-2012, 05:48 AM
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Need to be more specific on temps. You said over 210* for oil, and between 198-205* coolant. If the oil was 211* and coolant was 205* then probably not an issue.
It it was 215 and 198 Id start to be concerned.
Like mentioned, sensor or cooler..
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Old 04-13-2012, 05:58 AM
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Quote:
Originally Posted by Riverbogger View Post
Has anyone changed the sensor? And or the cooler? is it possible to unclog the cooler? also where is the sensor located?

Thanks!
I'm fairly certain the oil cooler is a cab off job. And when an oil cooler goes bad, there is a good chance your EGR coolers are bad too.

I havent changed a sensor before though.

Funny story about oil coolers:
Awhile back before I had the mods in my sig below, I was constantly going into regen (or what I thought was regen) so I took it to the dealer and had them look at it. All was well the dealer said... Well it starts acting up again and I'm just tired of smoking people out on the freeway.

I finally got another tech at the dealer involved and they kept it overnight to run some tests. Apparently they drove it up and down the freeway with a monitor plugged in and found my ECTs to be in the 198-204 range and my EOTs in the 250-256 range!!!! WTF!! Oil cooler was almost completely clogged. Also, they found the right side exhaust up-pipe and the turbo down-pipe gasket was leaking. (Dont know how they found this)

They ended up flushing my coolant, replaced the oil cooler along with the other stuff, and flushed it again. Damn thing runs good now.

ECT-~194
EOT-~195

This is definitely why I recommend a monitor with a code reader.

Last edited by nlcougar; 04-13-2012 at 06:01 AM.
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Old 04-13-2012, 06:39 AM
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My egg coolers were previously replaced by dealer under warranty. I now have 104,000 miles on it. so anything from hereon out is on me! any ideas! Where is the oil cooler located> anyone have any pics ? or has anyone done a swap? I've changed one of my radiators previously myself. not a hard job just took a few jobs
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Old 04-13-2012, 06:48 AM
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And i have a monitor with a code reader... no codes pop up though.... no check engine lights nothing. i can't figure it out!
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Old 04-13-2012, 06:49 AM
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Im going to run the truck and watch the temps and get back to y'all
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Old 04-13-2012, 06:54 AM
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If your oil is hotter than the coolant by more than 15* then you need an oil cooler. It is a cab off job and not fun to do, trust me...

The oil cooler on the 6.4L was prone to clogging just like the 6.0L.
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