1. Measure the bend, and repair or replace if necessary.
Service limit:
0.020 mm (0.00079 in)
2. Check the journal for damage and wear. Replace if faulty.
3. Check the cutout portion used for camshaft sensor for damage. Replace if faulty.
4. Measure the outside diameter of camshaft journal. If the journal diameter is not within specification, check the oil clearance.
|
Camshaft journal | ||
|
Front |
Center, rear | |
|
Standard mm (in) |
37.946 — 37.963 (1.4939 — 1.4946) |
29.946 — 29.963 (1.1790 — 1.1797) |
5. Measure the oil clearance of camshaft journal.
(1) Clean the camshaft cap and the camshaft journal of the cylinder head.
(2) Place the camshaft on cylinder head. (Without installing the valve lifter.)
(3) Place a plastigauge across each camshaft journals.
(4) Gradually tighten the camshaft cap in at least two stages in alphabetical order shown in the figure, and then tighten to specified torque. Do not turn the camshaft.
Tightening torque:
T1: 9.75 N·m (1.0 kgf-m, 7.2 ft-lb)
T2: 20 N·m (2.0 kgf-m, 14.8 ft-lb)
(5) Remove the camshaft cap.
(6) Measure the widest point of the plastigauge on each journal. If oil clearance exceeds the standard, replace the camshaft. If necessary, replace the camshaft caps and cylinder head as a set.
Standard:
0.037 — 0.072 mm (0.0015 — 0.0028 in)
(7) Completely remove the plastigauge.
6. Check the cam face condition; remove the minor faults by grinding with oil stone. Measure the cam height H. If it exceeds the standard or offset wear occurs, replace it.
Cam height H:
Standard
Intake
46.15 — 46.25 mm (1.817 — 1.821 in)
Exhaust
44.65 — 44.75 mm (1.758 — 1.762 in)
Cam base circle diameter A:
37.0 mm (1.457 in)
7. Measure the thrust clearance of camshaft with setting the dial gauge at end of camshaft. If the thrust clearance exceeds the standard or there is offset wear, replace the camshaft caps and cylinder head as a set. If necessary replace the camshaft.
Standard:
0.068 — 0.116 mm (0.0027 — 0.0047 in)
