"Delta Line" Kit. Good? Bad? - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

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post #1 of 20 Old 03-31-2017, 08:38 AM Thread Starter
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"Delta Line" Kit. Good? Bad?

In looking through the forum(s) I see a lot of references to a "Delta Line" or "Delta Hose" mod. As I understand it, it basically reroutes coolant path coming out of the oil cooler to bypass the manifold and return straight to the degas bottle...thereby increasing the volume of coolant passing through the oil cooler via the less restrictive path....okay. My question is why does there seem to be no discussion about this mod since 2014? I'm sure there are references here and there, but for a mod that would supposedly lower your deltas by several degrees with a simple hose and a couple of fittings there is a surprising lack of current discussion. What are the current feelings about this mod?
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post #2 of 20 Old 04-02-2017, 04:47 PM Thread Starter
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Nobody? :-( Why does this "mod" get so little interest?

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post #3 of 20 Old 04-02-2017, 05:47 PM
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My understanding is this: Basically the "Delta" temps everyone refers to is only a means of measuring oil cooler health. Therefore lowering coolant temps by any other means does only that. It doesn't change the health of the oil cooler.

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post #4 of 20 Old 04-02-2017, 06:26 PM Thread Starter
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The discussions that I've seen indicate that the "bypass" aspect of the kit increases the throughput of coolant inside the oil cooler, thereby increasing oil cooler effectiveness, and decreasing the "delta". Most discussions mention lowering their delta by several degrees. I'm sure that if you had a badly clogged cooler that this would be less effective. Hell...may not be effective at all anyway...maybe that's why the discussions died. Seems plausible though.

Unable to post links...but one company selling is absoulteperformance.

Certainly not much there for $175! There are obviously DIY alternatives.

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post #5 of 20 Old 04-02-2017, 06:37 PM
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As I look at it, a manifold is added to the oil cooler like in the IPR filter and the kit sends some coolant back to the Degas bottle instead of just going to the EGR. This would increase flow through the cooler and cool the oil cooler down.

AP 6.0 Delta kit

The way I look at the kit can't be right. If this is the case, than it's letting a portion of the coolant bound for the EGR flow into the Degas bottle, and that can't be good for the EGR.

I have come across references to this kit, but by the time I joined the forum in late 2014, I never read a post on it.

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post #6 of 20 Old 04-02-2017, 06:41 PM Thread Starter
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Quote:
Originally Posted by ChrisSki View Post
As I look at it, a manifold is added to the oil cooler like in the IPR filter and the kit sends some coolant back to the Degas bottle instead of just going to the EGR. This would increase flow through the cooler and cool the oil cooler down.


The way I look at the kit can't be right. If this is the case, than it's letting a portion of the coolant bound for the EGR flow into the Degas bottle, and that can't be good for the EGR.

I have come across references to this kit, but by the time I joined the forum in late 2014, I never read a post on it.

What if you had EGR deleted?

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post #7 of 20 Old 04-02-2017, 06:49 PM
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I remember looking in to this
but dismissed it as something I could use with my setup

I will have to look at it again to refresh my memory

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post #8 of 20 Old 04-02-2017, 07:04 PM Thread Starter
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Originally Posted by ZMANN View Post
I remember looking in to this
but dismissed it as something I could use with my setup

I will have to look at it again to refresh my memory
It looked like it was getting some pretty good press a few years ago and then the discussion died.

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post #9 of 20 Old 04-02-2017, 07:16 PM
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It would only be useful on a deleted truck, IMO. But even then aren't you just masking a possible problem, not fixing it? If you're deltas are exceeding the recommendation and you are able to bring them down with this, you still have a clogging cooler. Like @kcoyner said, it's not the oil temperature your really worried about. The test is designed to determine the health of the cooler itself and the great minds at Ford decided that 15 was the point that you were risking reduced flow to the EGR cooler and possible structural damage to it due to that. At least that's my simplified understanding of it.
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post #10 of 20 Old 04-02-2017, 08:32 PM
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Quote:
Originally Posted by G8orFord View Post
It would only be useful on a deleted truck, IMO. But even then aren't you just masking a possible problem, not fixing it? If you're deltas are exceeding the recommendation and you are able to bring them down with this, you still have a clogging cooler. Like @kcoyner said, it's not the COOLANT temperature your really worried about. The test is designed to determine the health of the cooler itself and the great minds at Ford decided that 15 was the point that you were risking reduced flow to the EGR cooler and possible structural damage to it due to that. At least that's my simplified understanding of it.
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