Disassembly and Assembly: Assembly

Replace with oversized [0.2 mm (0.008 in)] valve guide (EXH).

1. Using a suitable tool (A), ream cylinder head valve guide (EXH) hole.

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   Oversize (service) [0.2 mm (0.008 in)]:

   : Refer to Cylinder Head .

2. Heat cylinder head to 110 to 130 deg.C (230 to 266 deg.F) by soaking in heated oil (A).

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3. Using the suitable tool, press valve guide (EXH) from camshaft side to the dimensions as shown in the figure.

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   Projection (A)

   : Refer to Cylinder Head .

   WARNING: Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
4. Using the suitable tool (A), apply reamer finish to valve guide (EXH).

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   Standard

   : Refer to Cylinder Head .

Replace with oversize [0.5 mm (0.020 in)] valve seat (EXH).

1. Ream cylinder head recess diameter (a) for service valve seat (EXH) or valve seat (INT).

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   Oversize (service) [0.5 mm (0.020 in)]:

   : Refer to Cylinder Head .

   • Be sure to ream in circles concentric to valve guide center. This enables valve to fit correctly.
2. Heat cylinder head to 110 to 130 deg.C (230 to 266 deg.F) by soaking in heated oil (A).

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3. Provide valve seats (EXH) or valve seat (INT) cooled well with dry ice. Force fit valve seat (EXH) or valve seat (INT) into cylinder head.
   WARNING: Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
   CAUTION: Avoid directly touching cold valve seats.
4. Using a suitable tool, finish seat to the specified dimensions. Refer to Cylinder Head .

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   CAUTION: When using the valve seat cutter, firmly grip cutter handle with both hands. Then, press on the contacting surface all around the circumference to cut in a single drive. Improper pressure on cutter or cutting many different times may result in staged valve seat.
5. Using compound, grind to adjust valve fitting.
6. Check again for normal contact. Refer to Inspection .

1. Apply new engine oil on new valve oil seal joint and seal lip.
2. Using a suitable tool (A), press fit valve seal to height (b) shown in figure.

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   Height (b)
   Intake, Exhaust	: 14.3 - 14.9 mm (0.563 - 0.587 in)

• Install narrow pitch (B) end [paint mark (C)] to cylinder head side (valve spring seat side).

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  (A)	: Wide pitch
  	: Cylinder head side

  Paint mark color
  Intake	: Orange
  Exhaust	: White

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• Compress valve spring with a suitable tool (A/B/C). Install valve collet with a magnet hand.
  CAUTION: When working, take care not to damage valve lifter holes.
• Tap valve stem edge lightly with plastic hammer after installation to check its installed condition.