Rear Heater Core

[tekfire07]

Update to my post. I got the aluminum Dorman part and the Oteiker clamps. I will post pictures tomorrow after the repair. Thanks for all the advice.

 

[opfor2]

Do you feel comfortable using the "Oteiker Clamps" on radiator and fuel hoses?

 

[rdezs]

Radiator hoses, yes. On fuel hoses, it depends. On a low pressure carbureted system, I have used them. Higher pressure fuel injection requires different type of fitting.

 

[Foggy]

You can carefully cut it at the crimp, or replace it. Dorman has a 3/4 inch quick connect elbow that goes to 5/8 hose barb. Drop your spare tire and look up. You'll see the two half inch aluminum pipes, the hoses are cripped to the end of those pipes. It's easier to use a small pipe cutter and cut the pipes, then use a half inch compression fitting adapted to a hose barb.
Here's the parts I used, along with 5/8 silicone heater hose.

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And then there's the old ones that were all rotted

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Here's where I cut the aluminum pipes...
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Not very user friendly to get in there and carefully cut the crimp off, which is why I went with relocating the connection for easy access later on. You can see where the original crimps were

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Everything's available on Amazon. I used the half inch compression to 8AN male fitting. Then an 8AN female to a 5/8 hose barb. I prefer the oetiker crimp connections, but of course you can use your choice of hose clamps.

Great Post !
I am going to do this at preventative maint on both Yukons.
Do you happen to have a part number for the #8 an x 5/8 hose barb fittings??
The only one I can find is by aeromotive on summit for $38 each ! Gotta be a cheaper alternative