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ENGINE TOP END 5-25
Camshaft, Camshaft Chain
Camshaft, Camshaft Cap Wear
•
Remove the camshaft cap (see Camshaft Removal).
•
Cut strips of plastigage to journal width. Place a strip
on each journal parallel to the camshaft installed in the
correct position.
•
Tighten the camshaft cap bolts and upper chain guide
bolts to the specified torque (see Camshaft Installation).
NOTE
○
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 c amshaft journal and the camshaft cap
using plastigage (press gauge) [A].
Camshaft Journal, Camshaft Cap Clearance
Standard: 0.038 ∼ 0.081 mm (0.0015 ∼ 0.0032 in.)
Service Limit: 0.17 mm (0.0067 in.)
If any clearance exceeds the service limit, measure the
diameter of each camshaft journal with a m icrometer.
Camshaft Journal Diameter
Standard: 23.940 ∼ 23.962 mm (0.9425 ∼ 0.9434 in.)
Service Limit: 23.9 1 mm (0.941 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 limit, replace the
cylinder head unit.
Camshaft Runout
•
Remove the camshaft (see Camshaft Removal).
•
Set the camshaft in a camshaft alignment jig or on V
blocks.
•
Measure runout with a dial gauge at the specified place
as shown.
If the runout exceeds the service limit, replace the shaft.
Camshaft Runout
Standard: TIR 0.02 mm (0.0008 in.) or less
Service Limit: TIR 0.1 mm (0.004 in.)
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