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CAMSHAFTS
CHECKING THE CAMSHAFT
1. Inspect:
• Cam lobe
Pitting/scratches/blue discoloration → Re-
place.
2. Measure:
• Cam lobe length "a" and "b"
Out of specification → Replace.
3. Measure:
• Runout (camshaft)
Out of specification → Replace.
4. Measure:
• Camshaft-to-cap clearance
Out of specification → Measure camshaft
outside diameter.
Measurement steps:
a. Install the camshaft onto the cylinder head.
b. Position a strip of Plastigauge
®
"1" onto the
camshaft.
Cam lobes length:
Intake "a":
37.750–37.850 mm
(1.4862–1.4902 in)
<Limit>:
37.650 mm (1.4823 in)
Intake "b":
28.129–28.229 mm
(1.1072–1.1114 in)
<Limit>:
28.029 mm (1.1035 in)
Exhaust "a":
33.540–33.640 mm
(1.3205–1.3244 in)
<Limit>:
33.440 mm (1.3165 in)
Exhaust "b":
24.769–24.869 mm
(0.9752–0.9791 in)
<Limit>:
24.669 mm (0.9712 in)
Runout (camshaft):
Less than 0.03 mm (0.0012 in)
Camshaft-to-cap clearance:
0.028–0.062 mm (0.0011–0.0024 in)
<Limit>:0.08 mm (0.003 in)