1 Answer

Things You'll Need
Waste oil collection pan
Phillips screwdriver
Flat-blade screwdriver
Wrench set
Socket set
Antifreeze
Water

Instructions
Draining the Cooling System

1
Park the vehicle on a level surface. If the engine has been running allow it to cool completely.

2
Drain the cooling system. Remove the radiator cap from the radiator. Locate the petcock valve on the lower corner of the radiator. Place a waste oil collection pan underneath the petcock valve and turn it counterclockwise to open. Allow the cooling system to drain completely.

3
Label and remove the heater hoses from the heater core. The heater hoses will connect to the heater core in the engine bay, on the firewall, on the passenger side of the vehicle. Use either the Phillips or the flat-blade screwdriver to loosen the hose clamps that secure the hoses to the heater core. Then pull the hoses off the heater core.

Removing the Heater Core

4
Remove the heater core cover. Move to inside the passenger compartment. Locate the heater case. It will be bolted to the firewall, below the dash on the passenger side of the vehicle. Use an appropriate sized socket or wrench to remove the five screws that connect the heater core cover to the heater case, and remove the cover.

5
Remove the steel straps that secure the heater core to the heater case. Unscrew the four screws that connect the steel straps to the heater case using a socket or wrench and remove the straps.

6
Remove the heater core by pulling it out of the heater case.

Installing the Heater Core

7
Place the new heater core into position inside the heater case. Be sure to carefully guide the inlet and outlet tubes through the holes in the firewall.

8
Reinstall the heater core retaining straps, by reinstalling the four screws that secure them.

9
Place the heater core cover into position over the heater case and reinstall the five screws that secure it.

Refilling the Cooling System

10
Reconnect the heater hoses to the heater core. Slide the hoses onto the inlet and outlet fittings that extend through the firewall, and tighten the hose clamps.

11
Close the petcock valve on the lower corner of the radiator by turning it clockwise.

12
Refill the radiator with a 50/50 mix of antifreeze and water.

13
Reinstall the radiator cap onto the radiator.

14
Run the engine and visually inspect for leaks.

Read more: How to Replace an S10 Heater Core | eHow.com http://www.ehow.com/how_5640780_replace-s10-heater-core.html#ixzz27aLvXOHp