Kia Rio: Inspection
Camshaft Assembly
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1. |
Inspect the cam height.
Using a micrometer, measure the cam height.
Cam height
Intake : 44.15mm (1.7382in)
Exhaust : 43.55mm (1.7146in)
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If the cam lobe height is less than specified, replace the camshaft.
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2. |
Check the cranshaft journal for wear.
If the journal is worn excessively, replace the camshaft.
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3. |
Inspect the camshaft journal clearance.
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(1) |
Clean the bearing caps and camshaft journals.
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(2) |
Place the camshafts on the cylinder head.
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(3) |
Lay a strip of plastigage across each of the camshaft
journal.
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(4) |
Install the bearing caps and tighten the bolts with specified
torque.
Tightening torque
1st step
M6 bolt : 5.9 N.m (0.6 kgf.m, 4.3 lb-ft)
M8 bolt : 9.8 N.m (1.0 kgf.m, 7.2 lb-ft)
2nd step
M6 bolts : 11.8 ~ 13.7N.m (1.2 ~ 1.4kgf.m, 8.7
~ 10.1lb-ft)
M8 bolts : 18.6 ~ 22.6N.m (1.9 ~ 2.3kgf.m, 13.7
~ 16.6lb-ft)
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Do not turn the camshaft.
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(5) |
Remove the bearing caps.
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(6) |
Measure the plastigage at its widest point.
Bearing oil clearance
Standard :
0.027 ~ 0.058 mm (0.0011 ~ 0.0023 in)
Limit : 0.1 mm ( 0.0039 in)
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| A. |
If the oil clearance is greater than specified,
replace the camshaft.
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| B. |
If necessary, replace the bearing caps and cylinder
head as a set.
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4. |
Inspect the camshaft end play.
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(1) |
Install the camshafts.
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(2) |
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)
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| A. |
If the end play is greater than specified, replace
the camshaft.
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| B. |
If the end play is still greater than specification
after camshaft replacment, replace the bearing caps
and cylinder head as a set.
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(3) |
Remove the camshafts.
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CVVT (Continuously Variable Valve Timing) Assembly
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1. |
Inspect the CVVT for smooth rotation.
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(1) |
Clamp the camshaft using a vise. Be careful not to damage
the cam lobes and journals in the vise.
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(2) |
Check that the CVVT is locked by turning it clockwise
or counterclockwise. It must not rotate.
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(3) |
Intake CVVT : Seal one of the two advance holes in the
camshaft journal with tape.
Exhaust CVVT : Seal one of the two retard holes in the
camshaft journal with tape.
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(4) |
Intake CVVT : Apply approx. 150 kPa (1.5 kgf/cm², 21 psi
) of compressed air into the unsealed advance hole to release
the lock.
Exhaust CVVT : Apply approx. 150 kPa (1.5 kgf/cm², 21
psi ) of compressed air into the unsealed retard hole to release
the lock.
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Cover the oil paths with a piece of cloth when
applying compressed air to prevent oil from spraying.
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(5) |
Intake CVVT : With compressed air applied, rotate the
CVVT into the advance direction (counterclockwise) within its
phasing range and check that the CVVT turns smoothly.
Exhaust CVVT : With compressed air applied, rotate the
CVVT into the retard direction (clockwise) and check that the
CVVT turns smoothly.
CVVT phasing range
Intake : 25°±1° (from the most retarded position
to the most advanced position)
Exhaust : 20°±1° (from the most advanced position
to the most retarded position)
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(6) |
Intake CVVT : Rotate the CVVT into the most retarded position
(clockwise) and then check that the CVVT is locked.
Exhaust CVVT : Rotate the CVVT into the most advanced
position (counterclockwise) and then check that the CVVT is
locked.
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1.
Remove the cyliner head cover.
(Refer to Timing System)
2.
Remove the timing chain cover.
(Refer to Timing System)
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1.
Install the intake CVVT (A) and exhaust CVVT (B).
Tightening torque :
63.7 ~ 73.5 N.m (6.5 ~ 7.5 kgf.m, 47.0 ~ 54.2 lb-ft)
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Removal
Installation