MLA
- Inspect MLA. Using a micrometer, measure the MLA outside diameter. MLA O.D. Intake/Exhaust: 34.964 ~ 34.980 mm (1.3765 ~ 1.3771 in)
- Using a caliper gauge, measure MLA tappet bore inner diameter of cylinder head. Tappet bore I.D. Intake/Exhaust: 35.000 ~ 35.025 mm (1.3779 ~ 1.3789 in)
- Subtract MLA outside diameter measurement from tappet bore inside diameter measurement.
MLA to tappet bore clearance
[Standard]
Intake/Exhaust: 0.020 ~ 0.061 mm (0.0008 ~ 0.0024 in)
[Limit]
Intake/Exhaust: 0.07 mm (0.0027 in)
Scheme 407
Scheme 408
Scheme 409
Scheme 410
- Inspect cam lobes. Using a micrometer, measure the cam lobe height. Cam height [Standard value] Intake: 46.3 mm (1.8228 in) Exhaust: 45.8 mm (1.8031 in) If the cam lobe height is less than standard, replace the camshaft.
- Inspect camshaft journal clearance. Clean the bearing caps and camshaft journals. Place the camshafts on the cylinder head. Lay a strip of plastigage across each of the camshaft journal. Install the bearing caps. (See «INSTALLATION»(ref-286594-S29665655242008060300000) ) CAUTION: Do not turn the camshaft. Remove the bearing caps. Measure the plastigage at its widest point. Bearing oil clearance [Standard value] Intake No. 1 journal: 0.020 ~ 0.057 mm (0.0008 ~ 0.0022 in) No. 2,3,4 journal: 0.030 ~ 0.067 mm (0.0012 ~ 0.0026 in) Exhaust No. 1 journal: 0.020 ~ 0.057 mm (0.0008 ~ 0.0022 in) No. 2,3,4,, journal: 0.030 ~ 0.067 mm (0.0012 ~ 0.0026 in) If the oil clearance is greater than maximum, replace the camshaft. If necessary, replace cylinder head. Completely remove the plastigage. Remove the camshafts.
- Inspect camshaft end play. Install the camshafts. (See «INSTALLATION»(ref-286594-S29665655242008060300000) ) Using a dial indicator, measure the end play while moving the camshaft back and forth. Camshaft end play [Standard value]: 0.056 ~ 0.064 mm (0.0022 ~ 0.0025 in) If the end play is greater than maximum, replace the camshaft. If necessary, replace cylinder head. Remove the camshafts.
Scheme 411
Scheme 412
- Inspect CVVT assembly. Check that the CVVT assembly will not turn. Apply vinyl tape to the retard hole except the one indicated by the arrow in the illustration. Wind tape around the tip of the air gun and apply air of approx. 150 kpa (1.5 kgf/cm 2 , 21 psi) to the port of the camshaft. (Perform this order to release the lock pin for the maximum delay angle locking.) NOTE: When the oil splashes, wipe it off with a shop rag. Under the condition of (3), turn the CVVT assembly to the advance angle side (the arrow marked direction in the illustration) with your hand. Depending on the air pressure, the CVVT assembly will turn to the advance side without applying force by hand. Also, under the condition that the pressure can be hardly applied because of the air leakage from the port, there may be the case that the lock pin could be hardly released. Except the position where the lock pin meets at the maximum delay angle, let the CVVT assembly turn back and forth and check the movable range and that there is no disturbance. Standard: Movable smoothly in the range about 22.5° Turn the CVVT assembly with your hand and lock it at the maximum delay angle position (counter clockwise).