EOT vs. ECT - Ford Powerstroke Diesel Forum
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Old 06-11-2010, 06:37 PM
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EOT vs. ECT

Well I switched my Edge to monitor ECT and EOT. Turns out that my oil temp is steadily 35 degrees higher than my coolant. Apparently this is not good. The truck seems to run fine though. No smoke, not puking, not using oil nor coolant. Does this still mean my head gaskets are going?

BTW, my coolant temps are between 185 and 190 constantly. My oil temps are between 210 and 225.

What do you guys think? Thanks in advance for any help!
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Old 06-11-2010, 06:48 PM
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your cooler needs to be rebuilt or replaced. You shouldnt exceede a 15 degree difference. 4-5 degrees is ideal. Mine has a new cooler when I fire ringed the heads. I am typically a 2-3 degree difference.
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Old 06-11-2010, 07:55 PM
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Yep, it's your oil cooler. If you let it ride for too long you'll be replacing the EGR cooler and the HG's as well.

My advice: Tear it down, put ARP's, an EGR delete, coolant filter, and a rebuilt oil cooler and never worry about it again
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Old 06-11-2010, 08:21 PM
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Thanks guys.

That's what I was affraid of. My EGR has already been deleted. So if I rebuild the cooler I won't have to worry about it any more? What makes it go out in the first place?

I will go ahead and put studs and gaskets in it while its apart.
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Old 06-11-2010, 08:28 PM
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You don't have to touch the heads to rebuild the oil cooler. You just need to pull the intake. If you have the bucks and feel like spending them go ahead but I'd wait till the head gaskets need replacing if I was paying for it. You are talking about $1000's more to do studs and head gaskets.
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Old 06-11-2010, 08:30 PM
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It clogs up from all the casting sand and crap in your coolant. Grab yourself a coolant filter and it will never happen again

Good thinking on the studs

And go ahead and do an oil bypass as well if you got the cash.
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Old 06-11-2010, 08:32 PM
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It can get packed with deposits just like anything that a fluid flows through... But honestly, this isn't the best time to do studs/gaskets. Untill you actually need them or if you plan on making serious amounts of power over stock, just leave it as is....for now.
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Old 06-11-2010, 09:03 PM
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Sweet! I thought everything had to come out. So just the intake manifold has to come off? Is this something I could do myself? I am mechanically inclined....though my las comment doesn't sound that way. I am brand new to the diesel scene. Does anyone know what kinda money this could cost me?
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Old 06-11-2010, 09:05 PM
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I plan on doing the coolant filter very soon. Is there a kit or recommendation by you all on what to go with on the oil cooler?
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Old 06-11-2010, 09:06 PM
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You just have to get down under all the other crap, but yes, you could do it. Just take a few pics during to make sure it all goes back on right. Have a beer or two on hand. It should be no more than a few hundred bucks to buy new and a little over a hundred to rebuild your current one... And the coolant filter can be a diy, but it is easier to just buy a kit. I believe Stealth sells one of the most popular ones. I would recommend both at the same time.
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