The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Heater coolant diverter and LS water pump, huh??

pwdcougar · 11-01-2015, 08:44 PM

On some of the newer engines the heater core is an integral part of the engine cooling system. If you were to block off the heater core connection, a part of the engine would not receive proper cooling. When you hit the max cool setting on the AC the diverter valve bypasses the heater core and allows the coolant to flow properly. I used one from a Ranger on a project once.

No idea why it is necessary for this application though.

Can you get a hose from an autoparts store that has two different sizes molded in? On my old Cougar the bypass hose that goes from the water pump to the intake is a molded L shaped hose with two different sizes.

Paul

11-01-2015, 08:44 PM	#3
pwdcougar Registered User Join Date: Oct 2013 Location: New Jersey Posts: 1,302	Re: Heater coolant diverter and LS water pump, huh?? On some of the newer engines the heater core is an integral part of the engine cooling system. If you were to block off the heater core connection, a part of the engine would not receive proper cooling. When you hit the max cool setting on the AC the diverter valve bypasses the heater core and allows the coolant to flow properly. I used one from a Ranger on a project once. No idea why it is necessary for this application though. Can you get a hose from an autoparts store that has two different sizes molded in? On my old Cougar the bypass hose that goes from the water pump to the intake is a molded L shaped hose with two different sizes. Paul __________________ "You know that little thing in your head that keeps you from saying things you shouldn't? Yeah well, I don't have one of those" 1969 Mercury Cougar Standard 4 speed 1969 Mercury Cougar XR7 convertible 1970 4WD Chevrolet Suburban 1997 4WD Chevrolet Silverado Extended Cab Short Bed (purchased new January 1997)