1969 Dodge Dart GTS - Drain Radiator To Remove Heater Box?

Lord Sparky said
The service manual says to drain the radiator before removing the two hoses to the firewall connectors to the heater box. Is this really necessary? Any other tips to easily get the heater box out and rebuild? I’ve heard remove the seat and glove box and get the Detroit Muscle rebuild kit. Mopar A Body 67-72 BIG NON AC Heater Box Rebuild Restoration Seal Gasket Kit

I would definitely recommend it and, cap of the ends of the heater core inlet and outlet unless you want coolant all over your interior and floors. Taking out the passenger seat and glovebox helps greatly! The Kit from Detroit Muscle is excellent , easy to install and greatly improves air flow by removing air leaks. One thing, be careful when splitting heaterbox. Those clips that clamp the two sections together are hard to remove and if you are not careful, will easily crack up the lip they are attached to. you need to work them off slowly, do not just put a screwdriver behind them and force them off, you'll break the lip every time!!