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Fuel System (Service Information): Overview Lexus IS III

Fuel System 5 illustrations ~576 words

Scheme 34

Scheme 34: ILLUSTRATION
Scheme 34: ILLUSTRATION

*1 FUEL INJECTOR ASSEMBLY *2 NO. 3 FUEL PIPE SUB-ASSEMBLY *3 FUEL INJECTOR SEAL *4 FUEL DELIVERY PIPE SUB-ASSEMBLY *5 NO. 2 FUEL DELIVERY PIPE SUB-ASSEMBLY *6 NO. 1 BACK-UP RING *7 NO. 2 BACK-UP RING *8 O-RING *9 NO. 3 BACK-UP RING *10 E-RING *11 NOZZLE HOLDER CLAMP *12 INJECTOR VIBRATION INSULATOR N*m (kgf*cm, ft.*lbf): Specified torque • Non-reusable part

Scheme 35

Scheme 35: PROCEDURE
Scheme 35: PROCEDURE

Scheme 36

Scheme 36
Scheme 36

Scheme 37

Scheme 37
Scheme 37

Scheme 38

Scheme 38
Scheme 38
  1. REMOVE FUEL PUMP ASSEMBLY Refer to «REMOVAL [04/2013 - ]»(ref-665752-S11712684222014102400000)
  2. REMOVE NO. 3 FUEL PIPE SUB-ASSEMBLY Remove the 4 bolts and No. 3 fuel pipe sub-assembly from the fuel delivery pipe sub-assembly. Front NOTE: Pull and remove the No. 3 fuel pipe sub-assembly in a straight line to avoid damage to the seal surface of the delivery pipe O-rings. Remove the 2 O-rings, No. 1 back-up ring, No. 2 back-up ring, No. 3 back-up ring and 2 E-rings from the No. 3 fuel pipe sub-assembly.
  3. REMOVE NO. 2 FUEL DELIVERY PIPE SUB-ASSEMBLY Disconnect the 3 wire harness clamps. Nut Bolt Front Side Remove the 2 bolts and 2 nuts. With the connectors still connected, disconnect the No. 2 fuel delivery pipe sub-assembly. Front Side NOTE: Make sure that the fuel delivery pipe sub-assembly and No. 2 fuel delivery pipe sub-assembly are disconnected from the No. 2 fuel delivery pipe sub-assembly. Be extremely careful not to touch or strike the tips of the fuel injector assembly. Pull and remove the fuel pipe in a straight line without tilting it. Disconnect the 3 fuel injector assembly connectors. Remove the 3 injector vibration insulators from the cylinder head sub-assembly.
  4. REMOVE FUEL DELIVERY PIPE SUB-ASSEMBLY Disconnect the fuel pressure sensor connector and wire harness clamp. Disengage the 2 wire harness clamps. Nut Bolt Front Side Remove the 2 bolts and 2 nuts. With the connectors still connected, disconnect the fuel delivery pipe sub-assembly. Front Side NOTE: Be extremely careful not to touch or strike the tips of the fuel injector assembly. Pull and remove the fuel delivery pipe sub-assembly in a straight line without tilting it. Disconnect the 3 fuel injector assembly connectors. Remove the 3 injector vibration insulators from the cylinder head sub-assembly.
  5. REMOVE FUEL INJECTOR ASSEMBLY Secure the fuel delivery pipe sub-assembly and No. 2 fuel delivery pipe sub-assembly in a vise between aluminum plates and pull out the 6 fuel injector assemblies. NOTE: Pull and remove each fuel injector assembly in a straight line to avoid damage to the seal surface of the fuel delivery pipe sub-assembly and No. 2 fuel delivery pipe sub-assembly O-ring. For reinstallation, attach a tag or label with the corresponding cylinder number to each fuel injector assembly. Remove the nozzle holder clamp from each fuel injector assembly. Remove the O-ring, No. 1 back-up ring, No. 2 back-up ring, No. 3 back-up ring, and E-ring from each fuel injector assembly.
  6. REMOVE FUEL INJECTOR SEAL Using the tip of needle nose pliers, pinch and pull either of the 2 fuel injector seals at several points to stretch it. Repeat this for the other fuel injector seal. NOTE: Excessively pinching the fuel injector seal may damage the groove of the fuel injector assembly. If a fuel injector assembly is dropped or the tip of a fuel injector assembly is struck, replace it with a new one. Remove the 2 fuel injector seals from the fuel injector assembly.

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