Heater core hose quick disconnect upgrade

[A-2 ace]

Today I had to tackle the task of replacing one of these s.o.b's.. I wanted to change it out to a Earl's AN fitting, but not sure what to buy? Anyone know how to go about doing this?

 

[WILWAXU]

Here's the fitting I used: https://www.amazon.com/dp/B000LNMQTO/

 

[A-2 ace]

Have you had any problems with your heater core? When you switched from the quick connect to the barbed fitting?

 

[WILWAXU]

I replaced most of my cooling system at the same time, including the heater core. No problems. https://www.gmt400.com/threads/swap-meet-slam.42821/page-4

 

[WILWAXU]

Here's a couple threads on the subject. There are many more.
https://www.gmt400.com/threads/quick-disconnect-replacement.16385/
https://www.gmt400.com/threads/heat...barbed-fitting-and-hose-clamp-swap-fix.23434/

 

[Schurkey]

The original fitting is restricted so that the heater core doesn't explode when the RPM goes way up. It's necked-down internally to less than 1/4" diameter. Note restricted fitting on this TBI engine, "below" distributor at lower-left in this photo.

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You install a non-restricted fitting, expect problems when you wind the engine up. The radiator cap pressure is added to the water-pump pressure. Pump pressure is significant at high RPM.

 

[Supercharged111]

Parts stores always have these on the shelf, cleaner and easier just to shove a new one in. Takes all of 30 seconds and easier to take apart in the future.

 

[TechNova]

It will be just fine the barb fitting. Millions of SBC's made with similar setups that haven't exploded.

 

[TechNova]

It will be just fine the barb fitting. Millions of SBC's made with similar setups that haven't exploded.

 

[L29Sub]

Use top quality heater hoses. Cheap imports will fail prematurely.
Spring clamps are nice too. Not rough on the hose, yet maintains constant pressure.


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