T100 Pickup 2WD L4-2.7L (3RZ-FE) (1994)
Heater Core: Service and Repair
1.
Remove cooling unit as outlined under Evaporator Core.
2.
Drain engine coolant from radiator.
3.
Disconnect water hoses from heater core pipes.
4.
Remove instrument panel and reinforcement.
5.
Disconnect control cables from heater unit.
6.
Remove heat duct to register No. 4.
7.
Remove heater to register center duct.
8.
Remove heater unit.
9.
Remove heater air duct.
10.
Remove heater core retaining screws and plates.
11.
Pull heater core from heater unit.
12.
Reverse procedure to install.