Cylinder Head, Intake Manifold, Exhaust Manifold: Replacement

REPLACE VALVE GUIDE BUSHINGS 

1. Using SST and a hammer, tap out the guide bushing.

   SST 09201-10000 (09201-01060), 09950-70010 (09951-07100)

   Fig 1: Using SST And Hammer To Tap Out Guide Bushing

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2. Using a caliper gauge, measure the bushing bore diameter of the cylinder head.
   Fig 2: Using Caliper Gauge To Measure Bushing Bore Diameter Of Cylinder Head

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3. Select a new guide bushing (STD or 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.

   BUSHING BORE DIAMETER AND BUSHING SIZE SPECIFICATION
   
   

   Bushing bore diameter mm (in.)	Bushing size
   10.985-11.006 mm (0.4325-4333 in.)	Use STD
   11.035-11.056 mm (0.4344-0.4353 in.)	Use O/S 0.05

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: 

   VALVE GUIDE BUSHINGS PROTRUSION HEIGHT SPECIFICATION
   
   

   Intake	12.3-12.7 mm (0.484-0.500 in.)
   Exhaust	11.4-11.8 mm (0.449-0.465 in.)

   Fig 3: Tapping New Guide Bushing To Specified Protrusion Height

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   Different bushings are used for the intake and exhaust.

   Fig 4: Identifying Intake And Exhaust Valve Bush Length

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5. Using a sharp 6 mm reamer, ream the guide bushing to obtain the standard specified clearance (See INSPECTION ) between the guide bushing and valve stem.

Fig 5: Reaming Valve Guide Bushing

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002