2000 Pontiac Grand Prix replace heater core


Heater problem
2000 Pontiac Grand Prix 6 cyl Two Wheel Drive Automatic 110000 miles

would welcome detailed advice on how to replace heater core in above car which has 3.8 motor. I am a good home mechanic
thank you

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Saturday, January 23rd, 2010 AT 12:18 PM

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1. Disconnect the negative battery cable.
2. Remove the cosmetic/acoustic engine cover, as equipped.
3. Remove the air cleaner and duct assembly.
4. Drain the engine coolant into a suitable container.
5. On the 3.4L (VIN X) engine, remove the throttle body and the throttle body tube to which it mounts.
6. Disconnect both heater hoses from the heater core. On some vehicles, accessing the firewall side heater hoses can be a challenge due to limited working space. In addition, some vehicles equipped with the 3.1L engine may have quick-connect fittings on the hose, requiring special tool J 38723 Heater Line Quick Connect Separator, or equivalent.
7. Remove the lower center console, if equipped. Additional information may be found in the Control Panel service instructions, found in this section.
8. Remove both left and right underdash sound insulator panels.
9. Disconnect the lower heater duct.
10. Remove the heater core cover. The sealer usually should be discarded and replaced with new sealer. Evaluate the condition of the existing sealer and the availability of new sealer.
11. Locate and remove the heater core mounting clip and bracket and remove the heater core from the vehicle. Use care as it will likely have coolant inside and could drip onto the rugs or seats.
12. Installation is the reverse of the removal process. After refilling the cooling system, bleed out the air and check for leaks as outlined in of this guide.
13. Connect the negative battery cable.

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Monday, January 25th, 2010 AT 9:11 PM

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