The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Is this the right water pump for an L31 Vortec with Vintage AC?

geezer#99 · 10-20-2020, 03:14 PM

Water neck riser does no good. You already have a spot for your heater hose.
You need a spot to hook up a return line to.
Either on the water pump or on the rad. Your down flow rad doesn’t help with that. Return should be on outlet of rad which is the bottom tank on yours. I’m not sure if you’d get adequate flow down to the bottom.

10-20-2020, 03:14 PM	#14
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,517	Re: Is this the right water pump for an L31 Vortec with Vintage AC? Water neck riser does no good. You already have a spot for your heater hose. You need a spot to hook up a return line to. Either on the water pump or on the rad. Your down flow rad doesn’t help with that. Return should be on outlet of rad which is the bottom tank on yours. I’m not sure if you’d get adequate flow down to the bottom.