Cylinder head replacement - 2JZ-GE Engine - Toyota Supra A80

Replace valve guide bushings

1. Using SST and a hammer, tap out the guide bushing.
   SST 09201-10000 (09201-01060), 09950-70010 (09951-07100)
2. Using a caliper gauge, measure the bushing bore diameter of the cylinder head.
3. Select a new guide bushing (STD or O/S 0.05).
   Both intake and exhaust

   Bushing bore diameter mm (in.)	Bushing size
   10.985 - 11.006 mm (0.4325 - 0.4333 in.)	Use STD
   11.035 - 11.056 mm (0.4344 - 0.4353 in.)	Used O/S 0.05

   If the bushing bore diameter of the cylinder head is greater than 11.006 mm (0.4333 in.), machine the bushing bore to the following dimension:
   11.035 - 11.056 mm (0.4344 - 0.4353 in.)
   If the bushing bore diameter of the cylinder head is greater than 11.056 mm (0.4353 in.), replace the cylinder head.
4. Using SST and a hammer, tap in a new guide bushing to the specified protrusion height.
   SST 09201-10000 (09201-01060), 09950-70010 (09951-07100) Protrusion height:
   Intake 12.3 - 12.7 mm (0.484 - 0.500 in.)
   Exhaust 11.4 - 11.8 mm (0.449 - 0.465 in.)
   Different bushings are used for the intake and exhaust.
   
5. Using a sharp 6 mm reamer, ream the guide bushing to obtain the standard specified clearance (See page EM-35 ) between the guide bushing and valve stem.