Heater question again

[jason340]

This did not get answered in an earlier thread, which is the inlet to the heater, the small hose or the large one. 70 Challenger 440

[rUNCHARGER]

The large one.

Sheldon

[cudabob496]

The large one.

Sheldon

makes sense, gonna have hotter expanded fluid in it.

[70chall440]

Pulled this from the internet. If you look closely you can see arrows in the hoses depicting flow.

[jason340]

Thanks 70chall Looks like the small one is the inlet to the heater and the large one is the return.  Update on the rad flush for the heater core. While I am getting some flow through the core it isn't enough. I tried back flushing, recirculating with the rad flush and a sump pump and compressed air. I gave up and ordered a new heater core. Should have done that to start with.

[70chall440]

I went through the same thing to a degree at one point and it took me awhile to see which one was which, that is why I posted the drawing.

New heater core is the way to fly for sure.