ECT VS EOT
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Junior User
Joined: Jan 2015
Posts: 57
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From: Miami
I think so. I have had my truck for months and only driven 5k miles and done 3 oil changes (Im paranoid when it comes to that.) But never checked the coolant. I had to do a 4hr trip and while driving something told me to check the EOT and it was at 220 and climbing. Finally I got to my destination and it was at 236. I was crapping my pants because I had my 2 daughters with me. I checked my coolant and I was low. I went to a Ford dealer and bought 4 gallons of Gold Coolant and it took half gallon. On my way back home about 30 minutes in the temp got to 233 and 4 hours later getting home it was down to 217. I dont drive more than 65-70mph and it was about 93 degrees outside.
During my stay i FINALLY found out how to read my ECT and it maintained around 185 and went as low as 180.
During my stay i FINALLY found out how to read my ECT and it maintained around 185 and went as low as 180.
More Turbo
Joined: May 2015
Posts: 670
Likes: 13
From: Nampa, ID
Coolant should stay 188+ after it has fully warmed up, especially if you are seeing oil temps like that. Possibly a t-stat starting to go out? It's a common issue.
Since you are EGR deleted, you can go a little further than 15 degree difference, but your oil temps are starting to get hotter than I would be comfortable with. Are you towing?
First thing I would do is check both the coolant temp and oil temp first thing before driving, after the truck has sat for 10+ hours to see if your sensors read close to each other after a cold soak. sensor bias is possible and easily ruled out this way.
If one of your sensors isn't biased and you still have high coolant/oil deltas running 65mph, you could be looking at a new oil cooler.
If it makes you feel any better, while 236F is somewhat hot, it's not critical. The engine begins to defuel at around 253F and that's where you need to really start worrying.
Since you are EGR deleted, you can go a little further than 15 degree difference, but your oil temps are starting to get hotter than I would be comfortable with. Are you towing?
First thing I would do is check both the coolant temp and oil temp first thing before driving, after the truck has sat for 10+ hours to see if your sensors read close to each other after a cold soak. sensor bias is possible and easily ruled out this way.
If one of your sensors isn't biased and you still have high coolant/oil deltas running 65mph, you could be looking at a new oil cooler.
If it makes you feel any better, while 236F is somewhat hot, it's not critical. The engine begins to defuel at around 253F and that's where you need to really start worrying.
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Junior User
Joined: Jan 2015
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From: Miami
Ill check my cold readings in the morning one more time. I feel a little better that as I drove the temp was droping.
I did a flush now (that Ill have to do again, because I didnt take out all the tap water. But it did take 3.5 gallons of coolant) and drove it for 20 minutes and my ect held at 188 and my eot was at 206 when I parked it.
Im gonna do a oil change in the next month (about 500 miles from now) before a 5 hour trip and Ill flush the radiator again and this time use distilled water a few times.
My F450 is a third vehicle I use to haul luggage and family on vacations and weekend grocery getter.
I did a flush now (that Ill have to do again, because I didnt take out all the tap water. But it did take 3.5 gallons of coolant) and drove it for 20 minutes and my ect held at 188 and my eot was at 206 when I parked it.
Im gonna do a oil change in the next month (about 500 miles from now) before a 5 hour trip and Ill flush the radiator again and this time use distilled water a few times.
My F450 is a third vehicle I use to haul luggage and family on vacations and weekend grocery getter.
Logistics Pro
Joined: Feb 2013
Posts: 4,073
Likes: 5
From: TX
I agree. Not having egr cooler just means you don't have to worry about it failing and hydrolocking the engine.
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Lead Driver
Joined: Sep 2012
Posts: 7,832
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From: Manteca,Ca
Yikes that's defueling area, did you hear the fan come on ? so about the EGR Valve is it stealth, meaning still in place with Electrical connected? or Block off plate and Valve laying on top of the Engine ? I second the Oil cooler plugging. when I do a Flush I add a OEM thermostat with the mix , My spread is with no load stays around 3 deg EOT 192 ECT 190 loaded EOT194 ECT 190/192 this is with the BPD egr cooler and New OEM oil cooler in 100deg temps.
Last edited by 04badford; May 25, 2015 at 12:40 PM. Reason: EOT ECT
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Junior User
Joined: Jan 2015
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From: Miami
Yikes that's defueling area, did you hear the fan come on ? so about the EGR Valve is it stealth, meaning still in place with Electrical connected? or Block off plate and Valve laying on top of the Engine ? I second the Oil cooler plugging. when I do a Flush I add a OEM thermostat with the mix , My spread is with no load stays around 3 deg EOT 192 ECT 190 loaded EOT194 ECT 190/192 this is with the BPD egr cooler and New OEM oil cooler in 100deg temps.
Laughing Gas
Joined: Nov 2014
Posts: 765
Likes: 5
From: Long Island, NY
I switched to Zerex Extended Life Coolant. It meets Cat EL-1 specs.
Valvoline.com > Products > Zerex > Antifreeze Zerex > Zerex? Extended Life Antifreeze / Coolant
Any coolant that meets the Caterpillar EL-1 spec is good to go.
Valvoline.com > Products > Zerex > Antifreeze Zerex > Zerex? Extended Life Antifreeze / Coolant
Any coolant that meets the Caterpillar EL-1 spec is good to go.
Lead Driver
Joined: May 2014
Posts: 6,545
Likes: 13
From: Virginia Beach VA
ELC (Extended Life Coolant) and is made by a handful of companies. CAT, Peak Charge, Xerox.. When you flushed, just a water flush? 188 isn't bad but stock should be 192 and if it stayed at 185, maybe time for a new thermostat. A chemical flush before the oil cooler change is recommended to remove anything in the system that could clog the oil cooler as its a great filter.
Laughing Gas
Joined: Nov 2014
Posts: 765
Likes: 5
From: Long Island, NY
I got it from Napa. Autozone and Advanceauto did not have it in my area. Make sure you flush out the gold stuff properly and be sure to buy the ELC in concentrate, not 50/50 mix. Once the gold is completely flushed out with distilled water then add 3.5 gallons of the ELC concetrate and top off with distilled water.
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Junior User
Joined: Jan 2015
Posts: 57
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From: Miami
ELC (Extended Life Coolant) and is made by a handful of companies. CAT, Peak Charge, Xerox.. When you flushed, just a water flush? 188 isn't bad but stock should be 192 and if it stayed at 185, maybe time for a new thermostat. A chemical flush before the oil cooler change is recommended to remove anything in the system that could clog the oil cooler as its a great filter.
I thought I was done and started to pour my Ford Gold Coolant and at exactly 3.5 gallons it filled up. Right then and there I realized why the extra distilled water is needed.