Inspect the cam lobes.
Using a micrometer, measure the cam lobe height.
Cam height
LH camshaft
Intake : 35.452 ~ 35.652mm (1.3957 ~ 1.4306in)
Exhaust : 35.700 ~ 35.900mm (1.4055 ~ 1.4134in)
RH camshaft
Intake : 35.537 ~ 35.737mm (1.3991 ~ 1.4070in)
Exhaust : 35.452 ~ 35.652mm (1.3957 ~ 1.4036in)
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 ~ 14.7N.m (1.3 ~ 1.5kgf.m, 9.4 ~ 10.8lb-ft)
Do not turn the camshaft.
Remove the bearing caps.
Measure the plastigage at its widest point.
Bearing oil clearance
0.040 ~ 0.077mm (0.0016 ~ 0.0030in)
If the oil clearance is greater than specificaiton, 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 ~ 0.2mm (0.0039 ~ 0.0079in)
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.
