Valve Clearance: Adjustments
ADJUSTMENTNOTE: Adjust valve clearance while engine is cold.
1. Thoroughly wipe off engine oil around adjusting shim using rag.
2. Rotate crankshaft to position cam nose on camshaft of valve that must be adjusted upward.
3. Using small screwdriver, turn the round hole of adjusting shim in the direction of the arrow.
CAUTION: perform (the above procedure) during camshaft do not contact with adjusting shim.
4. Install lifter stopper [SST: 10115120 (J38972-2)] as follows:
a. Except exhaust side of No. 7 and 8 cylinder;
i. Place camshaft pliers (SST) around camshaft as shown in the figure.
ii. Rotate camshaft pliers so that valve lifter is pushed down.
CAUTION: Be careful not to damage cam surface, valve lifter and cylinder head with camshaft pliers.
iii. Place lifter stopper between camshaft and the edge of valve lifter to retain valve lifter.
CAUTION:
^ Lifter stopper must be placed as close to camshaft bracket as possible.
^ Be careful not to damage cam surface, valve lifter and cylinder head with lifter stopper.
iv. Remove camshaft pliers.
CAUTION: Camshaft pliers should be removed by rotating it slowly because lifter stopper hits and damages journal portion by rotating camshaft pliers quickly.
b. Exhaust side of No. 7 and 8 cylinders;
NOTE: Exhaust side of No. 7 and 8 cylinders does not have space for installing camshaft pliers [SST: KV10115110 (J38972-1)]. therefore, install lifter stopper [SST: KV10115120 (J38972-2)] according to the following instructions.
i. Rotate crankshaft to press cam nose to the adjusting part of valve lifter.
ii. Place lifter stopper between camshaft and the edge of valve lifter to retain valve lifter.
CAUTION:
^ Lifter stopper must be placed as close to camshaft bracket as possible.
^ Be careful not to damage cam surface, valve lifter and cylinder head with lifter stopper.
iii. Rotate crankshaft slowly 180° clockwise.
CAUTION: Rotating crankshaft slowly because lifter stopper hits and damages journal portion by rotating crankshaft quickly.
5. Blow air into the round hole to separate adjusting shim from valve lifter.
CAUTION: When blowing, use goggles to protect your eye.
6. Remove adjusting shim with magnetic hand.
7. Use the equation below to calculate adjusting shim thickness for
^ Using micrometer determine thickness of removed shim with measured at center.
^ Calculate thickness of new adjusting shim so valve clearance comes within specified values.
Valve lifter thickness calculation: t = t1 + (C1 - C2)
t = Valve lifter thickness to be replaced
t1 = Removed valve lifter thickness
C1 = Measured valve clearance
C2 = Standard valve clearance:
Intake: 0.30 mm (0.012 inch)
Exhaust: 0.33 mm (0.013 inch)
Shims are available in 64 sizes from 2.32 mm (0.0913 inch) to 2.95 mm (0.1161 inch) in steps of 0.01 mm (0.0004 inch).
^ Thickness of new adjusting shim can be identified by stamp marks on the reverse side (inside the cylinder).
8. Install new adjusting shim using suitable tool.
^ Install with the surface on which the thickness is stamped facing down.
9. Remove lifter stopper as follows:
a. Except exhaust side of No. 7 and 8 cylinder;
i. Perform same procedure for removal, place camshaft pliers (SST).
ii. Remove lifter stopper (SST).
iii. Remove camshaft pliers.
b. Exhaust side of No. 7 and 8 cylinder.
^ Rotate crankshaft slowly 180° clockwise. then remove lifter stopper.
10. Manually turn crankshaft pulley a few turns.
11. Make sure that the valve clearance is within the standard.
12. Install all removed parts in the reverse order of removal.
13. Warm up the engine, and check for unusual noise and vibration.