Head Coolant Flow

[Cant Write]

Passenger Side, Heater hose comes from heater core to middle of the head. Is it worth my time to move that to the back of the head?

My gut tells me yes. There is a plug and I need to drain coolant anyways.

See photo:

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[Cant Write]

The drivers side goes to the rear heater core (van) and returns back to the rear of the Driver’s Side head.

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[ihc1470]

You think Ford engineering made a mistake? I am guessing it is more for room issues for the hoses in the different applications. What is it you are hoping to gain?

 

[Cant Write]

You think Ford engineering made a mistake? I am guessing it is more for room issues for the hoses in the different applications. What is it you are hoping to gain?

I guess just to minimize any chance of head gasket failure.

I think I have read where the rear two cylinders run the hottest due to lowest circulation, CDR…..

I don’t begin to think I’m smarter than the Ford engineers and I think you are right (to fit most applications)

Would you take the time and effort to move it? Thanks for your thoughts!!

 

[ihc1470]

I would not myself. But mine is factory turbo and there is not much room in the right rear corner with the HVAC box etc that is in the way. It is your truck do as you wish, you will find no fault from me.

 

[Cant Write]

Van is setup with access to the rear corner.

 

[Jesus Freak]

Id leave it be for the trip, and maybe experiment when you're back home just in case there is some engineering marvel that we plebians don't understand and it won't be dramatic IF something goes wry. If you do swap it around make sure you have a Honda 3 wheeler on a trailer so you can get your family safely and securely to the closest Motel 6, ya know, like if you have to go through woods or ford a river or such...... just sayin'....

 

[asmith]

You think Ford engineering made a mistake? I am guessing it is more for room issues for the hoses in the different applications. What is it you are hoping to gain?

You also have to remember that the engineers on vehicles have a lot of constraints when designing vehicles. Just look at the diesel trucks today. They have to meet so many emission requirements that the MPG suffers. If you delete the trucks reliability, power and mileage all go up.

Or the cars of the the late '70s early '80s the engineers knew how to get more power out of the motors or cooler running or lots of things, but couldn't do that and meet the emission requirements. So its not that we know more than the Ford engineers, its just that we dont have the laws and regulations forcing us to make compromises on all the things that they did.

 

[ihc1470]

I agree when it comes to modern diesels and what they have to do to keep EPA happy. Do you think they same idea applies to heater hoses and routing? For instance from the pictures earlier in the thread on a van it looks like they used the left head. On a truck application they chose the right side.

On my truck I added a water shut off valve so on max AC there is no water flow through the HVAC box. If the goal is to move to the back of the head to hopefully drop the water temp slightly in the head then it would not help at all when there is no water circulating at all. And what about the other head since there is no heater connections at all?

If the op feels that they will gain in making the modification then by all means go for it.

 

[IDIBRONCO]

For instance from the pictures earlier in the thread on a van it looks like they used the left head. On a truck application they chose the right side.

The ones on the driver's side are for the rear heater. The ones for the front heater are on the passenger's side like the trucks use.

 

[Cant Write]

I’m back on shift, days. But I have the hose cleaned up and removed “mid-head” and have boughten a coupler and hose to extend to the rear. My goal is to reduce a potential hot spot.

I don’t have valves to valve off heater core flow. Top of my WP has (2) 5/8ths take-offs. 1 going to the rear htr core and returning LHS rear head. 2nd going to front heater core and “soon to be” returning rear of RHS head. The 2nd also has a 3/8th tee’d in that goes to the bottom of the rad to aid in trans warming or cooling depending on trans temp relative to coolant temp.

@Jesus Freak trailer…….pffft….ill just load it in the rear of my long ****** van like a stow-away. And I’ll need that headlight in case Motel 6 forgets to leave the light on!!!

 

[Jesus Freak]

Ahhhhh, the head light, how many ATVs have a headlight with an extension cord? Gimme an 85-87 big red......

 

[IDIBRONCO]

The TRX250s and the Bayou 300s also had them.

 

[asmith]

I agree when it comes to modern diesels and what they have to do to keep EPA happy. Do you think they same idea applies to heater hoses and routing? For instance from the pictures earlier in the thread on a van it looks like they used the left head. On a truck application they chose the right side.

On my truck I added a water shut off valve so on max AC there is no water flow through the HVAC box. If the goal is to move to the back of the head to hopefully drop the water temp slightly in the head then it would not help at all when there is no water circulating at all. And what about the other head since there is no heater connections at all?

If the op feels that they will gain in making the modification then by all means go for it.

Maybe it makes a difference, maybe it doesnt, I dont know in this particular case. But I do know that in many cases engineers make the engine run hotter than what is optimum for power and longevity in favor of running cleaner. Look at the IDIs, they blocked off cooling passages in the heads of the 7.3 that are in the 6.9s to get them to run a little warmer. Maybe running the heater line at the back will increase the flow there a little bit.

 

[Cant Write]

Look at the IDIs, they blocked off cooling passages in the heads of the 7.3 that are in the 6.9s to get them to run a little warmer.

I had no clue about this.