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 · 10-21-2020, 10:13 AM

Easier to just remove the bypass you have, plug the intake hole and use that spot on the pump for your heater hose return.
Run It like that.
If you read a bunch of threads on other forums you’ll see half the people out there run it just like that and have no problems.

Some thermostats come already drilled.
You don’t need to do that.

10-21-2020, 10:13 AM	#25
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,515	Re: Is this the right water pump for an L31 Vortec with Vintage AC? Easier to just remove the bypass you have, plug the intake hole and use that spot on the pump for your heater hose return. Run It like that. If you read a bunch of threads on other forums you’ll see half the people out there run it just like that and have no problems. Some thermostats come already drilled. You don’t need to do that.