Here's the complete adjustment procedure from my helms.
CAUTION: Always adjust timing belt tension with the engine cold.
NOTE:
- The tensioner is spring-loaded to apply proper tension to the belt automatically after making the following adjustment.
- Always rotate the crankshaft counterclockwise when viewed from the pulley side. Rotating it clockwise may result in improper adjustment of the belt tension.
- Remove the cylinder head cover.
- Set the No. 1 piston at TDC.
- Rotate the crankshaft 5-6 revolutions to set the belt.
- Set the No. 1 piston at TDC.
- Loosen the adjusting bolt 1/2 turn (180 degrees) only.
- Rotate the crankshaft counterclockwise 3 teeth on the camshaft pulley.
- Tighten the adjusting bolt.
- After adjusting, retorque the crankshaft pulley bolt to 177 Nm (18.0 kgfm, 130 lbf-ft).