Valve Clearance: Adjustment

1. Turn the crankshaft damper, and align its groove with timing mark "0" of the timing belt No. 1 cover.
   Fig 1: Aligning Crankshaft Damper With Timing Mark

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2. Check that the timing marks (1 dot mark) of the intake and exhaust camshaft gears on the LH bank are aligned.
   Fig 2: Checking Intake And Exhaust Camshaft Timing Mark Alignment

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If not, turn the crankshaft 1 revolution (360°) and align the mark as above.

1. Check the only the valves indicated.
   Fig 3: Locating Valves On RH And LH Bank (1 Of 2)

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   1. Using a feeler gauge, measure the clearance between the valve lifter and camshaft.
   2. Record the out-of-specification valve clearance measurements. They will be used later to determine the required replacement adjust shim.
   VALVE CLEARANCE SPECIFICATIONS (COLD)
   
   

   Intake	0.15 - 0.25 mm (0.006 - 0.010 in.)
   Exhaust	0.25 - 0.35 mm (0.010 - 0.014 in.)

2. Turn the crankshaft 1 revolution (360°) and align the mark as above (See procedure in step 3).
3. Check only the valves indicated as shown. Measure the valve clearance (See procedure in step (a)).
   Fig 4: Locating Valves On RH And LH Bank (2 Of 2)

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1. Using a magnet with powerful force, remove the valve lifter and adjusting shim.
   NOTE:

   • Since shims might drop inside the cylinder head, the operation should be performed slowly.
   • Shims should be classified by the installation.
2. Determine the replacement adjusting shim size according to the these Formula or Charts:
   1. Using a micrometer, measure the thickness of the removed shim.
   2. Calculate the thickness of a new shim so that the valve clearance comes within the specified value.

      T = Thickness of removed shim

      A = Measured valve clearance

      N = Thickness of new shim

   INTAKE AND EXHAUST VALVE SHIM SPECIFICATIONS
   
   

   Intake	N = T + (A - 0.20 mm (0.008 in.))
   Exhaust	N = T + (A - 0.30 mm (0.012 in.))

   Fig 5: Identifying Valve Adjustment Shim

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3. Select a new shim with a thickness as close as possible to the calculated value.
   NOTE: Shims are available in 41 increments of 0.020 mm (0.0008 in.), from 2.00 mm (0.0787 in.) to 2.80 mm (0.1102).
4. Reinstall a new adjusting shim to the spring retainer.
5. Reinstall the valve lifter.