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1994 K3500 extended cab dually

n8in8or

I never met a project I didn’t like
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Man that thing really zips for a dually!

What external regulator did you use for the raptor? Happy with the isolator for the gauge too?
This is the regulator I’m using. I ended up with one that has -6 inlet and outlet because it was a scratch n dent unit and I saved about $50. That doesn’t seem to effect its operation so I think it’s ok, but if all things were equal, I would have chosen one with -8 port sizes so it matched the hose size.


I’m not sure on the isolator yet. I sealed the seam with silicone and that seems to be working, but I think I still have air in the system I need to address because sometimes it will read really low at this gauge but be normal on the gauge at the regulator, then as things warm up it reads normal. I’m not sure it’s worth it to go mechanical for the gauge - between the cost of the gauge, the isolator and the hose and fittings to hook i, I probably spent just as much as I would have just getting an electronic gauge and it would have been easier to hook up.
 

n8in8or

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Last week I drove the truck in some 35 degree temperatures and I was getting very little heat out of the ducts. When I got home I pulled the screen out of the heater hose strainer for inspection and sure enough, it was blinded. It was covered with a layer of fine silt. Well this won’t do. I doubt that silt will plug the heater core, so the mesh is just too fine for this application. Tonight I replaced the 200 mesh with a 100 mesh screen. We’ll see how this does. In the pic, 200 is on the right and 100 is on the left.

1C4E7C15-6FEB-4EF8-B8BB-F3D934FFF6BC.jpeg
 

Husker6.5

135' diagonal 16:9HD, 25KW sound!
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What and where do you think this stuff is coming from and and is? Internal block corrosion? Crap in the well water you're putting into the system? Gremlin sabotage?
 

n8in8or

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What and where do you think this stuff is coming from and and is? Internal block corrosion? Crap in the well water you're putting into the system? Gremlin sabotage?
It’s coming from in the block. It was kinda crusty when I got it. I’m guessing it only had straight water run in it by the military, but that’s just a guess. I only use the finest artisanal distilled water in this thing now. 😋
 

Husker6.5

135' diagonal 16:9HD, 25KW sound!
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It’s coming from in the block. It was kinda crusty when I got it. I’m guessing it only had straight water run in it by the military, but that’s just a guess. I only use the finest artisanal distilled water in this thing now. 😋
Surprised you didn't do a chemical clean and back flush on the block before doing all of this. I'm sure Perrier appreciates the business with your fine, sparkling cooling system too, @n8in8or!
 

n8in8or

I never met a project I didn’t like
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Surprised you didn't do a chemical clean and back flush on the block before doing all of this. I'm sure Perrier appreciates the business with your fine, sparkling cooling system too, @n8in8or!
It was a few years ago, but I’m pretty sure the machine shop did some kind of clean on it, but now I don’t remember what for sure. I remember it still being scaly in the coolant jacket though when they were done. I don’t use that machine shop any longer for what it’s worth.

And I’ve been using San Pellegrino, not Perrier. 😁
 

MrMarty51

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I used to do quite a bit of engine rebuilding.
The old timer that I would take the blocks, heads, sheetmetal etc too, He would boil the componemts in his boil out tank, it was a hot solution of oakite. After retrieving the components from the tank they then would get thoroughly rinsed with hot water from a garden hose.
I was always surprised at the amount of sand and silt looking stuff that came from the internals of the blocks and heads.
I asked Him about that, He explained that it was casting sand from when the engines and heads were molded.
I am sure that after assembling those engines, the cooling systems were much cleaner than from the factory but, I always thought that through the heat and cool cycles, there would be still more of that sand and silt let loose and drift with the coolant, eddy in and settle in some of the calm areas too.

if I was running such a filter, I think I would run with that finer screen for just a few more cycles of clean to plugged, just to satisfy My curiosity. 🤷‍♂️😹😹😹😹
 

n8in8or

I never met a project I didn’t like
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I used to do quite a bit of engine rebuilding.
The old timer that I would take the blocks, heads, sheetmetal etc too, He would boil the componemts in his boil out tank, it was a hot solution of oakite. After retrieving the components from the tank they then would get thoroughly rinsed with hot water from a garden hose.
I was always surprised at the amount of sand and silt looking stuff that came from the internals of the blocks and heads.
I asked Him about that, He explained that it was casting sand from when the engines and heads were molded.
I am sure that after assembling those engines, the cooling systems were much cleaner than from the factory but, I always thought that through the heat and cool cycles, there would be still more of that sand and silt let loose and drift with the coolant, eddy in and settle in some of the calm areas too.

if I was running such a filter, I think I would run with that finer screen for just a few more cycles of clean to plugged, just to satisfy My curiosity. 🤷‍♂️😹😹😹😹
I may switch back to the finer screen in the spring when I need heat less, but I hadn't driven the truck probably 50 miles when the finer screen got blinded, so it's going to do it quite frequently right now and I don't want to be dealing with that during the winter - that could be dangerous to lose heat for defrosting purposes (as you know, since you're in the same climate :) ).
 
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