Heater Core O-rings
 

So fall is here and we got a cold front its getting a bit nippy even in louisiana and id like to have my heater back.

I tried using this website but it just confused me more http://www.rangerovers.net/repairdet...ateroring.html

Are the o-rings at the firewall or the transmission hump?

The o-rings are in the joint where the pipes connect to the heater core.