Is this oil cooler finished?

[OldIron82]

I finally got my o-rings and decided to rebuild the oil cooler I got off the ambulance 6.9 so as soon as I yank the blown one on the 7.3 in the truck I can replace it immediately. This thing did not want to come apart at all. When it finally did I was treated to this view. The tiny pieces of rolly metal in my hand? Drill shavings [emoji15]. Lol. Also, blowing out the tubes, black oil in some, milk in the others. I think everything on the ambulance 6.9 is just complete crap. My "pocket ace" 6.9 lmao. You know what? I made my decision while writing this. I'll use the one on the truck. The oil is clean and so is the coolant. Enjoy these pics anyway.

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[79jasper]

Hmmm. Wander where someone was drilling into the cooling system.

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[cpdenton]

Was that ambulance a van chassis?

Looks pretty rough, but if you clean it out thoroughly and it doesn't have any holes it should be good.

Now, if it came from a van, the cooler headers will be different.

 

[crash-harris]

IIRC the consensus was that it came from a truck chassis.

 

[Koch13351]

Well if the cooling system was filled with straight water, it could have frozen and burst the tubes in the cooler. That would also explain why it was so difficult to get the headers off - Hard water deposits and rust. A failed o-ring would also cause cross contamination though.
I would find something to run through the tubes to clear them out of any buildup or blockages. 1/8" TIG filler rod worked perfect for me. Blow the tubes out after cleaning, Then get one of the air blowguns with the pointy rubber tip and check each tube for leaks by covering one end with your finger and holding the tip of the blowgun in the other and listening through the oil ports on either end of the cooler tube.
The sealing surfaces are generally protected by the o-rings, so I wouldn't worry about the corrosion and pitting on the end of the cooler tube. Just clean that off with a wire wheel, being careful not to hit the sealing surfaces. Clean those with something that won't scratch, gouge, or otherwise damage them.

 

[OldIron82]

Truck chassis. The headers are the ones I'm familiar with as well. I will try that leak down test.

The drilling shavings? Who the hell knows. If I had to guess the clown that remanufactured the engine was a wham bam thank you ma'am. The entire driver side bank of the engine had valve marks in the pistons. A rush job for sure. Thanks for the info!

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