Re: Need to replace the Heater Core
Hmm, I've changed out a few from inside.
Drain coolant when disconnecting core hoses into drain pan outside firewall.
Push pass seat back as far as it will go.
Lay down a continuous sheet of plastic from trans tunnel to seat to toe panel at the top and over the rocker.
Unplug the resistor block above /behind the glovebox.
Remove the hoses and five speed nuts seen.
Inside wioth hands, pry out heater box - knida hard sincve you are working against the caulking and SLIGHTLY bent core nipples on engine side.
Once box loose from wall, lay with core facing up on floor.
Remove core and fix original core.
Assembly is reverse except install new clay weatherstripping on box for a good seal between box and firewall.
You should use a dab apiece of petroleum jelly on the core hoses, even if new, not a bad idea, when sliding on hoses.
Add coolant and more to fill core.
All done without removing anything other than resistor block plug.
The above works IF nipples are OE bent from OE core, If nipples bent more parallel to firewall, then it will be difficult tin removing box from firewall.
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