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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Components
COMPONENTS ILLUSTRATION *1 BACK DOOR CENTER GARNISH *2 REAR SIDE SPOILER SUB-ASSEMBLY LH *3 REAR SIDE SPOILER SUB-ASSEMBLY RH *4 REAR SPOILER ASSEMBLY *5 HOLE PLUG - - N*m (kgf*cm, ft.*lbf): Specified torque - - ILLUSTRATION *1 CENTER STOP LIGHT ASSE
Removal
REMOVAL PROCEDURE 1. REMOVE SERVICE PLUG GRIP Click here 2. REMOVE NO. 1 ENGINE COVER SUB-ASSEMBLY Click here 3. REMOVE REAR ENGINE UNDER COVER RH Click here 4. REMOVE FAN AND GENERATOR V BELT Click here 5. DISCONNECT RADIATOR RESERVE TANK ASSEMBLY Click here 6. REMOVE AIR CLEANER C
