Forest and the Trees.

Stepping back from OH’ing as an Event.

Some DMax overheat, some do not. TxC’s question "Why", is nagging me big time.

Engine design flaw? With over 600,000 units produced, not a high probability.

Package design (Chevy, Jimmy, 2000HD, 3000, etc.) flaw? To many operate normally, not a high probability.

Package materials used? The front of our trucks are predominately plastic, not very thick and is very flexible, (Fingers had his valance move back against his dam, at speed). With just engine vibration, then augmented ultimately by road vibration; the front of our trucks is fluid and in constant motion. Clearances and relationships are therefore fluid.

Assembly variables? Parts are manufactured to be within acceptable tolerances. If the parts on assembly are All at the low/high tolerance end (equals a lemon) the Unit - Unit variations will be different than nominal Unit - Unit variations.

Changing the trucks geometry, (tires, front/back relationship, lifts) appears, though not conclusively, to be a vital element in the OH equation.

As TxC has stated, What is the True Cause, we know the Effect. "Why".

In my judgment we have assembled enough data to change the OH condition to an acceptable condition for Most OH’ers.

Virgin undiluted air for the stack and reduce IAT (grill/stack ducting, sealed stack, deflect prop wash, dam to exhaust engine bay, augmented valance, etc.). That is really the essence, as I see it.

As Mods are installed and operating conditions become acceptable, continued research/interest will wane and disappear. Such is the nature of the bear.

However, it's not over until it's over (fat lady has laryngitis).

I will continue to wonder "Why".

This is a Team effort, the Team is the Forum members. No one has ever been excluded from inputting.

Personally, I thank the Team. :grd:

I am LB7, however I fully intend to benefit, Hugh.

FWIW

Idahofox

Excellent post idahofox!!! No OH'ing for me so far. Sad it has created hard feelings between members. Can't help feeling bad about the disaggreements. With so much great info from guys that know so much. Just thinking in type written form.

Good post.

Damn good.

.

Do we have a list of what's overheating yet? I'm talking by body style, options, etc.? I have an 05 crew cab 4x4, and I run the predator on 40, and no cat, and couldn't get the temp gauge to budge from 210 if I tried. I am running stock tires. I didn't know if there is a certain combo that's causeing more than others?

Great post Idaho!!

Do we have a list of what's overheating yet? I'm talking by body style, options, etc.? I have an 05 crew cab 4x4, and I run the predator on 40, and no cat, and couldn't get the temp gauge to budge from 210 if I tried. I am running stock tires. I didn't know if there is a certain combo that's causeing more than others?

TxC ran a Poll with Three (3), count'em variables.

Total responding, 157.

To answer your question, No.

Idahofox

Some ask "why"

others ask "why ask why"

while some :grd:

Here's to those in that last group... Great post idahofox

By design it was intended only to get an idea of the scope of the problem, not to identify it. It worked as intended. Its unfair to ask it to have done more than it was intended to do.

.

Some ask "why"

others ask "why ask why"

while some :grd:

Here's to those in that last group... Great post idahofox

The last group has to start out as the first group to ever become the last group.

.

Do we have a list of what's overheating yet? I'm talking by body style, options, etc.? I have an 05 crew cab 4x4, and I run the predator on 40, and no cat, and couldn't get the temp gauge to budge from 210 if I tried. I am running stock tires. I didn't know if there is a certain combo that's causeing more than others?

The only thing that stands out is towing heavy weight brings the problem out. That is what the 3 count 'em variables were sent out to find out and they did it well.

.

By design it was intended only to get an idea of the scope of the problem, not to identify it. It worked as intended. Its unfair to ask it to have done more than it was intended to do.

.

My point was simply that, there could easly be more than 157 variables required to answer a question with that dimention. Sorry it didn't come across that way. ):h

Idahofox

It still may be as simple as environmental factors, stacked on top of a system that is on a razor's edge of going into thermal overload due to design. OAT, load, altitude, grade, duration of grade, headwind, etc. Add in on some trucks parts that could be on the high/low side of tolerances.

What some here who have not witnessed this situation may not understand, is that the issue is self perpetuating. Once it begins to go into an OH situation, it will continue that way unabated until the driver either stops, or there is no more hill.

My point was simply that, there could easly be more than 157 variables required to answer a question with that dimention. Sorry it didn't come across that way. ):h

Idahofox

Very true. Everyone modifying the vehicles and towing different combos sends the variables flying.

.

It still may be as simple as environmental factors, stacked on top of a system that is on a razor's edge of going into thermal overload due to design. OAT, load, altitude, grade, duration of grade, headwind, etc. Add in on some trucks parts that could be on the high/low side of tolerances.

What some here who have not witnessed this situation may not understand, is that the issue is self perpetuating. Once it begins to go into an OH situation, it will continue that way unabated until the driver either stops, or there is no more hill.

See, thats the thing. Like I recently told JJ in a pm, I have never owned a vehicle that behaved in this fashion that did not end up with a major mechanical defect of some kind. Look at the post by oteo, 210 to 240 in TWO MINUTES?????????????

Its just not possible to overheat a vehicle that quickly that is functioning anywhere near as intended. They would ALL overheat if the design was that weak.

.

It still may be as simple as environmental factors,....

I will pray, doubt he'll listen to this Sinner. :(

Idahofox

I CAN'T believe this, a CIVIL topic and replies :eek:

Nick's going to fire us if this keeps up ):h

I CAN'T believe this, a CIVIL topic and replies :eek:

Nick's going to fire us if this keeps up ):h

learning curve:beerchug:

By the way me and the woman downed a potatoe each with our steaks out at Saltgrass last night.

Cha-ching!!

.

By the way me and the woman downed a potatoe each with our steaks out at Saltgrass last night.

Cha-ching!!

.

And More, More; we Thank 'ya.

Idahofox

:hug: :hug: :clap: I like the "Team" approach the best! JJ

:hug: :hug: :clap: I

Don't start anything or I'm going to have to edit U.

Come in here trying to start things ):h

:hug: :hug: :clap: I like the "Team" approach the best! JJ

Just because I have round heels, don't be calling me a Push-Over. :lol:

Idahofox

What some here who have not witnessed this situation may not understand, is that the issue is self perpetuating. Once it begins to go into an OH situation, it will continue that way unabated until the driver either stops, or there is no more hill.

Understood ! ! !

Idahofox

Let us all just take in this moment! :exactly: It has been a good week on the DP. Great strides by the DP Team!

Now about that $25? ):h Just couldn't help myself! :D JJ :)

Let us all just take in this moment! :exactly: It has been a good week on the DP. Great strides by the DP Team!

Now about that $25? ):h Just couldn't help myself! :D JJ :)

Pimp ! :grd:

Idahofox

It still may be as simple as environmental factors, stacked on top of a system that is on a razor's edge of going into thermal overload due to design. OAT, load, altitude, grade, duration of grade, headwind, etc. Add in on some trucks parts that could be on the high/low side of tolerances.

What some here who have not witnessed this situation may not understand, is that the issue is self perpetuating. Once it begins to go into an OH situation, it will continue that way unabated until the driver either stops, or there is no more hill.

Great post and thread Idaho!

I, for one have stood silently since the fiasco and I am glad I did. I have some, be it small experience with this issue. Having had a 04.5 truck that was stock, except for the larger wheels and tires that overheated while towing, and now have a virtual duplicate to that 04.5, with an 05 with the exception of a few mods and I no longer experience the OH conditions of the 04.5 truck. Maybe it’s as Oilburner stated, and with a few improvements in these circumstances the problem does not arise.