Water pump heater hose connection question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

JGross · 03-02-2013, 10:13 AM

I'm hooking up my Vintage Air HVAC system to my 5.3L and I need to know which of the connections on the water pump is the supply to the heater and which one is the return. I think the connection closest to the radiator is the supply and the one closest to the engine is the return, can someone please let me know if I'm correct?

Thanks

**chev3600** · 03-02-2013, 10:47 AM

The 5/8 connection supplies the heater. The larger 3/4 is the return.
Posted via Mobile Device

03-02-2013, 10:13 AM	#1
JGross Registered User Join Date: Apr 2010 Location: Hattiesburg Ms Posts: 235	Water pump heater hose connection question I'm hooking up my Vintage Air HVAC system to my 5.3L and I need to know which of the connections on the water pump is the supply to the heater and which one is the return. I think the connection closest to the radiator is the supply and the one closest to the engine is the return, can someone please let me know if I'm correct? Thanks

03-02-2013, 10:47 AM	#2
chev3600 Senior Member Join Date: Jan 2009 Location: Raleigh, NC Posts: 444	Re: Water pump heater hose connection question The 5/8 connection supplies the heater. The larger 3/4 is the return. Posted via Mobile Device __________________ 1949/1954 with LS swap-yeah! http://s260.photobucket.com/albums/i...0/AD%20trucks/jumbled mess of unorganized photos

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