Depends on the vehicle and somtimes engine size. B Clear.
Best to get the shop manual but basically: Reomove Heater hoses from engine block and drain. Remove glove box. Disconnect cables that connect to heater core. Disconnect heater core from firewall. Disconnect hoses from heater core. Pull heater core from under dash.
Disconnect both heater hoses from heater core and connect them together
Disconnect heater core inlet and outlet hoses - couple them together
To disconnect the coolant hoses from the heater core supply line on a Saturn, first, ensure the engine is cool and the vehicle is parked on a level surface. Locate the heater core hoses, which are typically found on the passenger side of the engine bay. Use pliers to loosen the hose clamps, then gently twist and pull the hoses off the heater core fittings. Be prepared for some coolant spillage, so have a container ready to catch any fluid that may leak out.
Disconnect them from heater core and with a coupling and 2 hose clamps tie them together
To change the heater core in a 1986 Toyota Supra, first disconnect the battery and drain the coolant. Remove the dashboard and climate control assembly to access the heater core housing. Disconnect the heater core hoses from the firewall, then unbolt and remove the heater core itself. Install the new heater core, reassemble the housing, dashboard, and reconnect the hoses, ensuring to refill the coolant before testing the system.
To change the heater core on a 1988 Mercury Cougar, first ensure the engine is cool, then disconnect the battery. Remove the dashboard and the center console to access the heater core housing. Disconnect the hoses from the heater core, remove the mounting bolts, and take out the old core. Install the new heater core by reversing the disassembly steps, reattach the hoses, and reassemble the dashboard and console.
You have to pull the dash and all the lower fascia, then remove the box that houses the heater core. Take the clamps off the heater hoses from the engine compartment side of the firewall and disconnect the heater hoses. Disconnect the bracket that holds the heater core in place from the inside of the passenger compartment (if present.) Carefully remove the heater core and discard it. Install a new heater core reversing the above steps.
To replace the heater core in a 2008 Cadillac DTS, first, disconnect the negative battery cable and drain the coolant. Remove the dashboard and center console to access the heater core, which is located in the HVAC housing. Disconnect the heater core hoses, unbolt the core from its mounting, and replace it with the new unit. Reassemble the dashboard, reconnect the hoses, refill the coolant, and test the system for leaks.
you should only have to take loose the heater hoses where they go into the firewall and of course the heater core itself
To change the heater core in a 1998 Ford Ranger, first ensure the engine is cool and disconnect the battery. Remove the dashboard components to access the heater core, which typically involves removing the center console and the dashboard itself. Disconnect the heater hoses from the old heater core, remove the mounting screws, and take out the old core. Install the new heater core by reversing the removal process, reconnect the hoses, and reassemble the dashboard.
To replace the heater core on a 1989 Lincoln Mark VII, first, disconnect the battery and drain the coolant from the radiator. Remove the dashboard and the center console to access the heater box. Disconnect the heater hoses from the core, unbolt the heater box, and carefully remove the old heater core. Install the new heater core, reassemble the heater box, reconnect the hoses, and put the dashboard back in place before refilling the coolant and reconnecting the battery.