Heater Hose - Aluminum Parts Upgrade

[Yukon_driver]

Has anyone replaced the plastic hose connections on the firewall with metal aftermarket parts? Specifically the Dorman T connector and the Dorman 800-409 adapter? I attached pictures of these parts below for your reference. I have ordered these parts because I want to minimize the risk of failure in my coolant system, especially something that does fail so universally on these engines!

Anyway, I was hoping to get advice from someone who knows: should I expect to replace any O rings in this process? If so, can someone please provide me with a part number? I have had a pretty difficult time determing from the websites if I need new O rings and there is very little to find about them on youtube. Also, would anyone know the part number for the plastic clips that snap the adapters into place or will I need to transfer those from the old T connectors?

Thank you for your help!

 

[Tonyrodz]

Has anyone replaced the plastic hose connections on the firewall with metal aftermarket parts? Specifically the Dorman T connector and the Dorman 800-409 adapter? I attached pictures of these parts below for your reference. I have ordered these parts because I want to minimize the risk of failure in my coolant system, especially something that does fail so universally on these engines!

Anyway, I was hoping to get advice from someone who knows: should I expect to replace any O rings in this process? If so, can someone please provide me with a part number? I have had a pretty difficult time determing from the websites if I need new O rings and there is very little to find about them on youtube. Also, would anyone know the part number for the plastic clips that snap the adapters into place or will I need to transfer those from the old T connectors?

Thank you for your help!

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Pretty sure @89Suburban swapped his. He has a GMT900, but those are pretty much the same parts between the 2.

 

[Yukon_driver]

Pretty sure @89Suburban swapped his. He has a GMT900, but those are pretty much the same parts between the 2.

Nice thread man! Seems like you've done a lot of the things I want to do with my Yukon, I'll definitely be looking into your project for inspiration.

 

[Tonyrodz]

Nice thread man! Seems like you've done a lot of the things I want to do with my Yukon, I'll definitely be looking into your project for inspiration.

Thank you for the compliment. You're gonna have to weed out a lot of bs pertaining to my procrastinating lol.

 

[rockola1971]

Has anyone replaced the plastic hose connections on the firewall with metal aftermarket parts? Specifically the Dorman T connector and the Dorman 800-409 adapter? I attached pictures of these parts below for your reference. I have ordered these parts because I want to minimize the risk of failure in my coolant system, especially something that does fail so universally on these engines!

Anyway, I was hoping to get advice from someone who knows: should I expect to replace any O rings in this process? If so, can someone please provide me with a part number? I have had a pretty difficult time determing from the websites if I need new O rings and there is very little to find about them on youtube. Also, would anyone know the part number for the plastic clips that snap the adapters into place or will I need to transfer those from the old T connectors?

Thank you for your help!

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Lock clips and oring should already be installed on the new parts. Every replacement ive ever used has them installed. The top picture shows the clips installed. Cant tell on the bottom pic. You should be able to reuse your old locks if needed and assuming they are compatible with the new parts. Orings can be bought at just about any hardware store. They are nothing special since gas or oil is not involved.

 

[89Suburban]

Pretty sure @89Suburban swapped his. He has a GMT900, but those are pretty much the same parts between the 2.

Iamdub/Chris installed them and texted me the photos and info. I don't think he did that adaptor though. I have not seen that piece before in metal.

Links to the metal tee pics:

https://www.tahoeyukonforum.com/threads/the-what-you-up-to-thread.54016/page-7975#post-1947494

https://www.tahoeyukonforum.com/threads/the-what-you-up-to-thread.54016/page-7976

 

[Joseph Garcia]

Has anyone replaced the plastic hose connections on the firewall with metal aftermarket parts? Specifically the Dorman T connector and the Dorman 800-409 adapter? I attached pictures of these parts below for your reference. I have ordered these parts because I want to minimize the risk of failure in my coolant system, especially something that does fail so universally on these engines!

Anyway, I was hoping to get advice from someone who knows: should I expect to replace any O rings in this process? If so, can someone please provide me with a part number? I have had a pretty difficult time determing from the websites if I need new O rings and there is very little to find about them on youtube. Also, would anyone know the part number for the plastic clips that snap the adapters into place or will I need to transfer those from the old T connectors?

Thank you for your help!

View attachment 453901View attachment 453903

I would either use (1) OEM plastic Tees (Dorman plastic tees don't last as long), or (2) use the Gruven metal Tees.

When you change out the tees, be sure to wear gloves, as the firewall insulation is quite aggressive, and your hands will itch for days.

 

[Yukon_driver]

Iamdub/Chris installed them and texted me the photos and info. I don't think he did that adaptor though. I have not seen that piece before in metal.

Links to the metal tee pics:

https://www.tahoeyukonforum.com/threads/the-what-you-up-to-thread.54016/page-7975#post-1947494

https://www.tahoeyukonforum.com/threads/the-what-you-up-to-thread.54016/page-7976

I was not able to view the pictures, says I don't have permission or something like that. Could you drop the picture directly into the post maybe? It would be really cool to see the metal T's installed on someones system before I get started!

 

[Yukon_driver]

Lock clips and oring should already be installed on the new parts. Every replacement ive ever used has them installed. The top picture shows the clips installed. Cant tell on the bottom pic. You should be able to reuse your old locks if needed and assuming they are compatible with the new parts. Orings can be bought at just about any hardware store. They are nothing special since gas or oil is not involved.

Great, thanks! I just got the adapter from the second picture today and thankfully it does have the rubber seal on the inside and the clip is also pre-installed

 

[Fless]

I was not able to view the pictures, says I don't have permission or something like that. Could you drop the picture directly into the post maybe? It would be really cool to see the metal T's installed on someones system before I get started!

You should be able to view the pics now.