Repair [08/2015 - ]: Procedure
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2024 Lexus IS 300, 2023 Lexus IS 300, 2022 Lexus IS 300, 2021 Lexus IS 300, and 2020 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.
- REPAIR INTAKE VALVE SEAT NOTE:
- 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.
- Using a 45° cutter, resurface the valve seat so that the valve seat width is more than the specification.
- 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.
*a Width *b 60° *c 45° *d 30° Standard width
1.0 to 1.4 mm (0.0394 to 0.0551 in.)
- Hand-lap the valve and valve seat with an abrasive compound.
- Check the valve seating position.
- REPAIR EXHAUST VALVE SEAT NOTE:
- 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.
- Using a 45° cutter, resurface the valve seat so that the valve seat width is more than the specification.
- 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.
*a Width *b 75° *c 45° *d 30° Standard width
1.2 to 1.6 mm (0.0472 to 0.0630 in.)
- Hand-lap the valve and valve seat with an abrasive compound.
- Check the valve seating position.