OEM 2003 Toyota Highlander Fuel Injector

2003 Toyota Highlander Parts Questions & Experts Answers

• Q: How to replace the fuel injector assembly on 2003 Toyota Highlander?

  A: The first step to replace the fuel injector assembly consists of protecting against fuel spillage. Start by removing the air cleaner cap combined with the air cleaner hose and afterward separate the fuel tube sub-assembly. You should remove the fuel delivery pipe along with its injectors carefully because dropping the injectors must be avoided. Begin by disconnecting the 4 injector connectors before removing the 2 clamps as well as the wire harness from the delivery pipe and finally taking out the 2 bolts to separate the delivery pipe with its attached 4 injectors. Take away the two spacers which are attached to the cylinder head. Remove the 4 injectors through the delivery pipe as the next step. To install these components use new insulators placed on each injector followed by application of spindle oil or gasoline to new O-rings before installation and an additional light coat of spindle oil or gasoline should be applied where delivery pipe meets the O-rings. Install the injectors inside delivery pipes by turning them clockwise and counter-clockwise but refrain from twisting the O-rings. Follow up the injector installation procedure by testing the smooth rotation of all components and replace any injector which does not function properly. Position the injector connectors downward. The installation of the delivery pipe with injectors requires first positioning two spacers upon the cylinder head followed by placing the delivery pipe and four injectors on top of the cylinder head. Install the two bolts temporarily to maintain the delivery pipe position before checking the injector movement because incorrect O-ring placement could require new parts. Position the injector connectors outward to secure the 2 delivery pipe bolts at a torque of 20 N.m (204 kgf.cm, 15 ft.lbf) on the cylinder head. Finally, inspect for fuel leaks.