Yet Another EOT/ECT Question
Senior User
Joined: Aug 2012
Posts: 163
Likes: 0
From: Chester, Va
If I were you I would not change the Oil Cooler at this point. I understand the whole "I am already in there" thought, but I think that by messing with stuff and disrupting the cooling system you could cause problems. You could stir up debris in the system and plug the new cooler. If I were in your shoes, I would sit the new cooler on the shelf for when you actually do need it. Lots of folks on here have replaced oil cooler and still only get as good as deltas as you are currently getting. JMHO.
Hotshot
Joined: Dec 2003
Posts: 15,368
Likes: 121
From: Stuttgart, Ar
Personally, without the EGR cooler being in place, I wouldn't worry about the temp delta unless you're getting some really high EOT's. You won't hit a defuel until 254, the standpipe in the oil filter doesn't melt until 350 (read this as NEW MOTOR), and modern oils don't start to break down until higher temps than that.
Senior User
Joined: Aug 2012
Posts: 163
Likes: 0
From: Chester, Va
Personally, without the EGR cooler being in place, I wouldn't worry about the temp delta unless you're getting some really high EOT's. You won't hit a defuel until 254, the standpipe in the oil filter doesn't melt until 350 (read this as NEW MOTOR), and modern oils don't start to break down until higher temps than that.
Senior User
Joined: Jan 2008
Posts: 371
Likes: 4
The high differences in the oil and water temp signifies that there is a restriction in the coolant system. If you have a working EGR cooler and there is a restriction in the system it can cause the EGR cooler to overheat and rupture. When this happens you can be putting antifreeze into the cylinders, which is a big no-no.
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Cargo Master
Joined: Apr 2010
Posts: 3,236
Likes: 0
From: Shelbyville, Indiana
Personally, without the EGR cooler being in place, I wouldn't worry about the temp delta unless you're getting some really high EOT's. You won't hit a defuel until 254, the standpipe in the oil filter doesn't melt until 350 (read this as NEW MOTOR), and modern oils don't start to break down until higher temps than that.
Besides, if the head gaskets blow, it'll be a good excuse for me to rebuild the top end and push her HP up to 700 or 800!
Senior User
Joined: Aug 2012
Posts: 163
Likes: 0
From: Chester, Va
The high differences in the oil and water temp signifies that there is a restriction in the coolant system. If you have a working EGR cooler and there is a restriction in the system it can cause the EGR cooler to overheat and rupture. When this happens you can be putting antifreeze into the cylinders, which is a big no-no.
Hotshot
Joined: Dec 2003
Posts: 15,368
Likes: 121
From: Stuttgart, Ar
I'm sure that with the EGR cooler being blocked off it takes some cooling load off the system but I doubt that it's significant. Your motor is getting cleaner air to burn but it's producing more NOx.
Senior User
Joined: Aug 2012
Posts: 163
Likes: 0
From: Chester, Va
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