OEM 2005 Toyota Highlander Heater Core

2005 Toyota Highlander Parts Questions & Experts Answers

• Q: How to replace the Heater Core on 2005 Toyota Highlander?

  A: Start your Heater Rear Assembly replacement by taking out both Deck Side Trim Cover Front LH and RH then proceed to the Deck Trim Side Panel Assembly RH. Start by disconnecting the Heater Water Outlet Hose through plier-manipulation of the clip; secure the heater water pipes while you perform this step to guard against hose damage; lay down a drain pan or cloth ready to collect any coolant that would leak during the process. Execute the exact procedure for disconnection on the Heater Water Inlet Hose. Start by uninstalling the Foot Air Duct Rear through 2 clip removal followed by detaching Air Duct Rear No.5 after unplugging its wire harness clamp and unfastening the 2 clips. The Rear Heater Assembly requires the washer hose clamp disconnection followed by bolt removal along with the plate and unfastening the Heater Relay No.1 clamp and Heater Blower Resistor connection before extracting the assembly. Extract the Water Pipe & Hose Sub-Assembly after sliding off the 2 clips with pliers since applying excessive force can be detrimental. The installer should begin by disconnecting the 2 clamps and connector from the Rear Heater Blower Resistor before using 2 screws to remove it altogether. Start dismantling by removing the nine screws and clamp from the Rear Heater Unit Sub-Assembly then proceed to disconnect the Rear Heater Blower Fan Sub-Assembly by uninstalling the nut and washer. The last step involves disconnecting the connector clamp from the Rear Heater Blower Motor Sub-Assembly before removing it together with its 3 screws. First position the Rear Heater Blower Fan Sub-Assembly with washer then secure it with a nut before tightening it to 4.0 N.m (41 kgf.cm, 35 in.lbf). First secure all 4 bolts on the Rear Heater Assembly using the specified torque order of 9.8 N.m (100 kgf.cm, 87 in.lbf), before reconnecting the Heater Blower Resistor connector, installing the Heater Relay No.1, reconnecting the water hose and finally tightening the plate with 4 bolts which includes tightening Bolt A to 9.8 N.m (100 kgf.cm, 87 in.lbf).