Valve Clearance: Adjustment

HINT:

Inspect and adjust the valve clearance when the engine is cold.

1. REMOVE RH ENGINE UNDER COVER 
2. REMOVE AIR CLEANER ASSEMBLY 
3. REMOVE CYLINDER HEAD COVER 
4. SET NO. 1 CYLINDER TO TDC/COMPRESSION 
   1. Turn the crankshaft pulley, and align its groove with timing mark 0 of the timing chain cover.
      Fig 1: Aligning Groove With Timing Mark Turning Crankshaft Pulley

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Check that the timing marks of the camshaft timing sprocket and VVT timing sprocket are aligned with the timing marks of the No. 1 and No. 2 bearing caps as shown in Fig 2 .

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

      Fig 2: Checking Timing Marks & VVT Timing Sprocket Are Aligned With Bearing Caps

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. INSPECT VALVE CLEARANCE 
   1. Check only the valves indicated.
      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 adjusting valve lifter.

         Valve clearance (Cold): 

         VALVE CLEARANCE (COLD) SPECIFICATIONS
         
         

         Intake	0.19 to 0.29 mm (0.008 to 0.011 in.)
         Exhaust	0.30 to 0.40 mm (0.012 to 0.016 in.)

      Fig 3: Checking Valves

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Turn the crankshaft 1 revolution (360°) and align the mark as above (see step  4).
   3. Check only the valves indicated as shown in Fig 4. Measure the valve clearance (see step  a).
      Fig 4: Checking Valves Indicated

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. ADJUST VALVE CLEARANCE 
   1. Set the No. 1 cylinder to the TDC/compression (See step  4).
   2. Place matchmarks on the timing chain and camshaft timing sprockets.
      Fig 5: Placing Match Marks Of Timing Chain & Camshaft Timing Sprockets

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Remove the 2 nuts, gasket and chain tensioner.
   4. Hold the hexagonal head portion of the camshaft with a wrench, and loosen the camshaft timing sprocket bolt.
      NOTE: Be careful not to damage the cylinder head and valve lifter with the wrench.