5-24 ENGINE TOP END
Camshaft, Camshaft Chain
Camshaft, Camshaft Cap Wear Inspection
•
Remove:
Camshaft Caps (see Camshaft Removal)
•
Cut the strips of plastigage (press gauge) to journal width.
Place a strip on each journal parallel to the camshaft in-
stalled in the correct position.
•
Tighten the camshaft cap bolts and upper camshaft chain
guide bolts to the specified torque (see Camshaft Instal-
lation).
○
Do not turn the camshaft when the plastigage is be-
tween the journal and camshaft cap.
•
Remove the camshaft cap again, measure each clear-
ance between the camshaft journal and the camshaft cap
using plastigage [A].
Camshaft Journal, Camshaft Cap Clearance
0.038 ∼ 0.081 mm (0.0015 ∼ 0.0032 in.)
Standard:
Service Limit: 0.17 mm (0.0067 in.)
If any clearance exceeds the service limit, measure the
diameter of each camshaft journal with a micrometer.
Camshaft Journal Diameter
23.940 ∼ 23.962 mm (0.9425 ∼ 0.9434 in.)
Standard:
Service Limit: 23.91 mm (0.9413 in.)
If the camshaft journal diameter is less than the service
limit, replace the camshaft with a new one and measure
the clearance again.
If the clearance still remains out of the service limit, re-
place the cylinder head unit.
Camshaft Runout Inspection
•
Remove the camshafts (see Camshaft Removal).
•
Set the camshaft in a camshaft alignment jig or on V
blocks.
•
Measure the runout with a dial gauge [A] at the specified
place as shown.
If the runout exceeds the service limit, replace the
camshaft.
Camshaft Runout
Standard:
TIR 0.02 mm (0.0008 in.) or less
Service Limit: TIR 0.1 mm (0.004 in.)
NOTE
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