Hi this is Al, Here is the procedure from the workshop manual I hope it helps, If not let me know, Al
NOTE: If a heater core leak is suspected, the heater core must be pressure leak tested before it is removed from the vehicle. For additional information, refer to Section 412-00.
NOTE: Use care not to spill the coolant remaining in the heater core during removal.
Sorry, Try this I hope it helps, Al
Does it take a special tool to diengage the hoses from the heater core and can I reach them from the cab to disengage them after I remove the engine cover?
I want to change the anti freeze anyway so would draining the radiator negate the need for the plugs? I'm just wondering on this but is the blowere behind the core, that is when I remove the core will I be able to see the blower or is the blower going to interfer in the removal?