Inspect the cam lobes.
Using a micrometer, measure the cam lobe height.
Cam height
LH camshaft
Intake : 35.321 ~ 35.521mm (1.3906 ~ 1.3985 in)
Exhaust : 35.673 ~ 35.873 mm (1.4045 ~ 1.4123 in)
RH camshaft
Intake : 35.537 ~ 35.737 mm (1.3991 ~ 1.4070 in)
Exhaust : 35.452 ~ 35.652 mm (1.3957 ~ 1.4036 in)
If the cam lobe height is less than specification, replace the camshaft.
Inspect the 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 and tighten the bolts with specified torque.
Tightening torque :
12.7 ~ 14.7 N.m (1.3 ~ 1.5 kgf.m, 9.4 ~ 10.8 lb-ft)
Do not turn the camshaft.
Remove the bearing caps.
Measure the plastigage at its widest point.
Bearing oil clearance :
0.040 ~ 0.077 mm (0.0016 ~ 0.0030 in)
If the oil clearance is greater than specification, replace the camshaft. If necessary, replace the bearing caps and cylinder head as a set.
Completely remove the plastigage.
Remove the camshafts.
Inspect the camshaft end play.
Install the camshafts.
Using a dial indicator, measure the end play while moving the camshaft back and forth.
Camshaft end play
Standard : 0.1 ~ 0.2 mm (0.0039 ~ 0.0079 in)
If the end play is greater than specification, replace the camshaft. If necessary, replace the bearing caps and cylinder head as a set.
Remove the camshafts.
