Antifreeze Leaking Connection On Intake Manifold

[gyver]

Heater hose connection on intake continues to leak again and again. Seems like every two years im replacing the retaining clip that holds the hose in the connector. The only retaining clip I can find is the cheap hard plastic ones that break or don't seal very well. someone needs to engineer something better is all.

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[Caman96]

What brand replacement? I replaced mine last summer with Acdelco, no leaks yet. I did save my original though just in case!

 

[JWOK]

You can replace the quick connect with a standard nipple style connector which are stocked at most parts stores, the threads are the same. Just requires a slightly longer heater hose and clamp. The quick connects have been notorious for leaks since they came out. Also pretty common for them to corrode internally and break when trying to replace them.

 

[454cid]

The clip just holds it together your oring is probably bad.

 

[1998_K1500_Sub]

See this post, it has recommendations and part numbers you might find useful in your situation.

mystery coolant hose - unable to identify

I have a 1996 C1500 4.3 and the water pump has two small hoses coming out of it. I was able to determine one of them is a bypass hose. 2 hours of research, i can't identify the other hose of roughly same size and ID. anyone know what this hose is called, or a part number? im trying to replace...

www.gmt400.com

 

[1998_K1500_Sub]

... replace the quick connect with a standard nipple style connector which are stocked at most parts stores

A restrictive nipple has been suggested to be used when replacing the quick connect, see...

Restricted fitting to replace heater QD. Udated Delco fitting 15-33220

There are several threads with the pros and cons to using brass fittings to replace the problematic quick disconnect that tends to leak and break. I'm not going to beat that dead horse but share the restricted fitting i have found. Orginally I used a NAPA fitting but it was 5/8 so I'm going to...

www.gmt400.com

Reportedly the quick connect was restrictive for a reason, and that restriction should be maintained.

 

[Papablunt]

This is what I used.

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[eran tomer]

i used this 3/4 nipple on the manifold:

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and this fabricated restrictor inside the heater core inlet:

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[El Tigre]

I converted this set-up to AN-10 hoses/fittings....

 

[Hamps]

i used this 3/4 nipple on the manifold:

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and this fabricated restrictor inside the heater core inlet:

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I used the same setup but didn’t use a restrictor. My heater still works really well. I’m curious if it improved heat on your setup. Have you ran it both ways? Thanks.