Camshaft (for Bank 1)

1UR-FSE ENGINE MECHANICAL: CAMSHAFT (for Bank 1): INSPECTION

1. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY

(a) Rotate the keyway part of the camshaft timing gear assembly's eccentric shaft by hand.





Standard:

Rotates smoothly

HINT
When rotating the eccentric shaft, the rotation will feel heavy due to the built-in spring. However, this is not a problem.

NOTICE:
* Do not drop the camshaft timing gear assembly. If the gear is dropped, replace it.
* Do not disassemble the camshaft timing gear assembly. If the gear is disassembled, replace it.

If the result is not as specified, replace the camshaft timing gear assembly.

(b) Using a caliper gauge, measure the width of the keyway part of the camshaft timing gear assembly.





Standard width:

6.02 to 6.11 mm (0.237 to 0.241 in.)

If the width is not as specified, calculate the clearance between the keyway part and the joint of the camshaft timing control with EDU motor.

(1) Using a vernier caliper, measure the width of the camshaft timing control with EDU motor joint.

Standard width:

5.90 to 5.95 mm (0.232 to 0.234 in.)

(2) Subtract the joint width measurement from the keyway part width measurement.

Standard clearance:

0.07 to 0.21 mm (0.00276 to 0.00827 in.)

Maximum clearance:

0.7 mm (0.0276 in.) or more

If the clearance is more than the maximum, replace the camshaft timing gear assembly.

2. INSPECT CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY

(a) Install the camshaft bearing cap Installation.

HINT
Only install the exhaust camshaft.

(b) Install the camshaft housing Installation.

(c) Apply a light coat of engine oil to the camshaft and camshaft timing exhaust gear.

(d) Using the hexagonal portion of the camshaft, align and attach the knock pin of the camshaft with the pin hole of the camshaft timing exhaust gear assembly.





NOTICE:
* Do not forcefully push on the camshaft timing exhaust gear assembly. This may cause the tip of the camshaft knock pin to damage the installation surface of the camshaft timing exhaust gear assembly.
* Be sure not to remove the other 4 bolts. If removed, replace the camshaft timing exhaust gear assembly.






(e) Apply a light coat of engine oil to the threads and under the head of the bolt.

(f) Using a wrench to hold the hexagonal portion of the camshaft, install the camshaft timing exhaust gear assembly with the bolt.





Torque : 100 Nm (1020 kgf-cm, 74 ft-lbf)

(g) Remove the camshaft bearing cap Removal.

(h) Check the lock of the camshaft timing gear.

(1) Make sure that the camshaft timing exhaust gear is locked.

(i) Release the lock pin.





(1) Cover the 4 oil paths of the cam journal with vinyl tape as shown in the illustration.

(2) Prick a hole in the tape placed on the advance side path. Prick a hole in the tape placed on the retard side path on the opposite side to that of the advance side path, as shown in the illustration.

(3) Apply approximately 200 kPa (2.0 kgf/cm2, 28 psi) of air pressure to the 2 broken paths (the advance side path and the retard side path).





CAUTION:
Cover the paths with a piece of cloth when applying pressure to keep oil from splashing.

(4) Check that the camshaft timing gear revolves in the retard direction when reducing the air pressure applied to the advance side path.





HINT
This operation releases the lock pin for the most retarded position.

(5) When the camshaft timing gear reaches the most retarded position, release the air pressure from the advance side path and retard side path in that order.

NOTICE:
Do not release the air pressure from the retard side path first. The gear may abruptly shift in the advance direction and break the lock pin.

(j) Check for smooth rotation.

(1) Turn the camshaft timing gear within its movable range (21°) 2 or 3 times, but do not turn it to the most advanced position. Make sure that the gear turns smoothly.

NOTICE:
Do not use air pressure to perform the smooth rotation check.

(k) Check the lock in the most advanced position.

(1) Confirm that the camshaft timing gear is locked at the most advanced position.

(l) Install the camshaft bearing cap Installation.

HINT
Only install the exhaust camshaft.

(m) Install the camshaft housing Installation.

(n) Hold the hexagonal portion of the camshaft with a wrench and loosen the bolt.





(o) Remove the camshaft bearing cap Removal.

(p) Remove the flange bolt and camshaft timing exhaust gear.





NOTICE:
Be sure not to remove the other 4 bolts.

3. INSPECT CAMSHAFT SUB-ASSEMBLY

(a) Inspect the camshaft runout.





(1) Place the camshaft on V-blocks.

(2) Using a dial indicator, measure the circle runout at the center journal.

Maximum circle runout:

0.04 mm (0.0016 in.)

If the circle runout is greater than the maximum, replace the camshaft.

HINT
Check the oil clearance after replacing the camshaft.

(b) Using a micrometer, measure the cam lobe height.





Standard cam lobe height:





Minimum cam lobe height:





If the cam lobe height is less than the minimum, replace the camshaft.

(c) Using a micrometer, measure the journal diameter.





Standard journal diameter:





If the journal diameter is not as specified, check the oil clearance.

4. INSPECT CAMSHAFT OIL CLEARANCE

(a) Clean the bearing caps, camshaft housing and camshaft journals.

(b) Place the camshafts on the camshaft housing.

(c) Lay a strip of Plastigage across each of the camshaft journals.





(d) Install the bearing caps Installation.

NOTICE:
Do not turn the camshaft.

(e) Install the camshaft housing Installation.

NOTICE:
Do not turn the camshaft.

(f) Remove the bearing caps Removal.

(g) Measure the Plastigage at its widest point.





Standard oil clearance:





Maximum oil clearance:





If the oil clearance is greater than the maximum, replace the camshaft. If necessary, replace the camshaft housing.