Repair [04/2013 - 08/2015]: Procedure
WARNING: This page is about a different car, the 2015 Lexus IS 250 and 2014 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
- REPAIR INTAKE VALVE SEATS NOTE:
- Repair the intake valve 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 intake valve seat so that the intake valve seat width is more than the specification.
*1 45° Cutter - Using 30° and 75° cutters, correct the intake valve seat so that the intake valve contacts the entire circumference of the intake valve seat.
The contact should be in the center of the intake valve seat, and the intake valve seat width should be maintained within the specified range around the entire circumference of the intake valve seat.
*a Standard Width Standard width
1.0 to 1.4 mm (0.0394 to 0.0551 in.)
- Hand-lap the intake valve and intake valve seat with an abrasive compound.
- Check the intake valve seating position.
- REPAIR EXHAUST VALVE SEATS NOTE:
- Repair the exhaust valve 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 exhaust valve seat so that the exhaust valve seat width is more than the specification.
*1 45° Cutter - Using 30° and 60° cutters, correct the exhaust valve seat so that the exhaust valve contacts the entire circumference of the exhaust valve seat.
The contact should be in the center of the exhaust valve seat, and the exhaust valve seat width should be maintained within the specified range around the entire circumference of the exhaust valve seat.
*a Standard Width Standard width
1.2 to 1.6 mm (0.0472 to 0.0630 in.)
- Hand-lap the exhaust valve and exhaust valve seat with an abrasive compound.
- Check the exhaust valve seating position.