Lexus NX: Repair
REPAIR
PROCEDURE
1. REPAIR INTAKE VALVE SEAT
NOTICE:
- Repair the seat while checking the seating position.
- Keep the lip free of foreign matter.
- Take off the cutter gradually to make the intake valve seat smooth.
| (a) Using a 45° cutter, resurface the valve seat so that the valve seat width is more than the specification. |
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| (b) Using 30° and 60° cutters, correct the valve seat so that the valve contacts the entire circumference of the seat. The contact should be in the center of the valve seat, and the valve seat width should be maintained within the specified range around the entire circumference of the seat. Standard width: 1.0 to 1.4 mm (0.0394 to 0.0551 in.) |
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(c) Hand-lap the valve and valve seat with an abrasive compound.
(d) Check the valve seating position.
2. REPAIR EXHAUST VALVE SEAT
NOTICE:
- Repair the seat while checking the seating position.
- Keep the lip free of foreign matter.
- Take off the cutter gradually to make the exhaust valve seat smooth.
| (a) Using a 45° cutter, resurface the valve seat so that the valve seat width is more than the specification. |
|
| (b) Using 30° and 75° cutters, correct the valve seat so that the valve contacts the entire circumference of the seat. The contact should be in the center of the valve seat, and the valve seat width should be maintained within the specified range around the entire circumference of the seat. Standard width: 1.2 to 1.6 mm (0.0472 to 0.0630 in.) |
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(c) Hand-lap the valve and valve seat with an abrasive compound.
(d) Check the valve seating position.
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Components
COMPONENTS ILLUSTRATION *1 EGR COOLER ASSEMBLY *2 EGR VALVE ASSEMBLY *3 FUEL DELIVERY PIPE *4 INJECTOR VIBRATION INSULATOR *5 INTAKE MANIFOLD *6 NO. 1 EGR PIPE *7 N
Removal
REMOVAL PROCEDURE 1. REMOVE TIMING CHAIN COVER ASSEMBLY Click here 2. REMOVE EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY Click here 3. REMOVE THROTTLE WITH MOTOR BODY ASSEMBLY Click here 4. REMOVE W
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How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use the following procedure to troubleshoot the automatic headlight beam level control system (for Triple Beam Headlight).
*: Use the Techstream
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. CUSTOMER PROBLEM ANALYSIS AND SYMPTO
Only Back Door cannot be Opened
DESCRIPTION The main body ECU (multiplex network body ECU) receives signals from the back door opener switch assembly. Then, the main body ECU (multiplex network body ECU) activates the back door lock motor. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
When using the Techstream with the vehicl
