- Camshaft lobes
Blue discoloration/pitting/scratches → Replace the camshaft.
2. Measure:
- Camshaft lobe dimensions "a" and "b"
Out of specification → Replace the camshaft.
Camshaft lobe dimension limit Intake A 37.350-37.450 mm (1.4705-I.4744 in).
Limit 37.250 mm (1.4665 in).
Intake B 28.034-28.134 mm (1.10371.1076 in).
Limit 27.934 mm (1.0998 in).
Exhaust A 36.450-36.550 mm (1.43501.4390 in).
Limit 36.350 mm (1.4311 in).
Exhaust B 28.006-28.106 mm (1.10261.1065 in).
Limit 27.906 mm (1.0987 in).
3. Measure:
- Camshaft runout
Out of specification → Replace.
Camshaft runout limit 0.030 mm (0.0012 in).
4. Measure:
- Camshaft-journal-to-camshaft-cap clearance
Out of specification → Measure the camshaft journal diameter.
Camshaft-journal-to-camshaft-cap clearance 0.028-0.062 mm (0.0011-0.0024 in).
a. Install the camshaft into the cylinder head (without the dowel pins and camshaft caps).
b. Position strip of Plastigauge "1" onto the camshaft journal as shown.
c. Install the dowel pins and camshaft caps.
- Tighten the camshaft cap bolts in stages and in a crisscross pattern, working from the inner caps out.
- Do not turn the camshaft when measuring the camshaft journal-to-camshaft cap clearance with the Plastigauge.
Camshaft cap bolt 10 Nm (1.0 m·kgf, 7.2 ft·lbf).
d. Remove the camshaft caps and then measure the width of the Plastigauge "2".
5. Measure:
- Camshaft journal diameter "a"
Out of specification → Replace the camshaft.
Within specification → Replace the cylinder head and the camshaft caps as a set.
Camshaft journal diameter 25.459-25.472 mm (1.0023-1.0028 in).
