Kia Sorento: CVVT & Camshaft Inspection
Continuously variable valve timing (CVVT) Assembly
|
1. |
Inspect the CVVT for smooth rotation.
|
(1) |
Clamp the camshaft using a vise. Be careful not to damage the
cam lobes and journals in the vise.
|
|
(2) |
Check that the CVVT is locked by turning it clockwise or counterclockwise.
It must not rotate.
|
|
(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.
[Intake]
[Exhaust]
|
|
(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.
|
Cover the oil paths with a piece of cloth when applying
compressed air to prevent oil from spraying.
|
|
|
(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 : 22.5°±1° (from the most retarded position to
the most advanced position)
Exhaust : 20°±1° (from the most advanced position to
the most retarded position)
|
|
|
(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.
|
|
Camshaft
|
1. |
Inspect the cam lobes.
Using a micrometer, measure the cam lobe height.
Cam height
[Standard value]
Intake : 44.10 ~ 44.30 mm (1.7362 ~ 1.7440 in.)
Exhaust : 44.90 ~ 45.10 mm (1.7677 ~ 1.7756 in.)
|
If the cam lobe height is less than standard, replace the camshaft.
|
|
2. |
Inspect the camshaft journal clearance.
|
(1) |
Clean the bearing caps and camshaft journals.
|
|
(2) |
Place the camshafts on the cylinder head.
|
|
(3) |
Lay a strip of plastigage across each of the camshaft journal.
|
|
(4) |
Install the bearing caps.
|
Do not turn the camshaft.
|
|
|
(5) |
Remove the bearing caps.
|
|
(6) |
Measure the plastigage at its widest point.
Bearing oil clearance
[Standard value]
Intake :
No.1 : 0.022 ~ 0.057 mm (0.00087 ~ 0.00224 in.)
No.2, 3, 4, 5 : 0.045 ~ 0.082 mm (0.00177 ~ 0.00323
in.)
Exhaust:
No.1 : 0 ~ 0.032 mm (0 ~ 0.00126 in.)
No.2, 3, 4, 5 : 0.045 ~ 0.082 mm (0.00177 ~ 0.00323
in.)
[Limit]
Intake:
No.1 : 0.090 mm (0.00354 in.)
No.2, 3, 4, 5 : 0.120 mm (0.00472 in.)
Exhaust :
No.1 : 0.090 mm (0.00354 in.)
No.2, 3, 4, 5 : 0.120 mm (0.00472 in.)
|
If the oil clearance is greater than maximum, replace the camshaft.
If necessary, replace cylinder head.
|
|
(7) |
Completely remove the plastigage.
|
|
(8) |
Remove the camshafts.
|
|
|
3. |
Inspect the camshaft end play.
|
(1) |
Install the camshafts.
|
|
(2) |
Using a dial indicator, measure the end play while moving the
camshaft back and forth.
Camshaft end play
[Standard value] : 0.04 ~ 0.16 mm (0.0016 ~ 0.0063 in.)
[Limit] : 0.20 mm (0.0078 in.)
|
If the end play is greater than maximum, replace the camshaft.
If necessary, replace cylinder head.
|
|
(3) |
Remove the camshafts.
|
|
Exhaust Camshaft Bearing
|
1. |
Check the cylinder head bore mark.
Cylinder Head Bore Identification Mark
Cylinder Head Specifications
Class
|
Mark
|
Exhaust No.1 Inside Diameter Of Cylinder
Head Bore
|
a
|
A
|
40.000 ~ 40.008 mm
(1.57480 ~ 1.5751in.)
|
b
|
B
|
40.008 ~ 40.016 mm
(1.57511 ~ 1.57543 in.)
|
c
|
C
|
40.016 ~ 40.021 mm
(1.57543 ~ 1.57563 in.)
|
|
|
2. |
Select class of camshaft bearing same as class of cylinder head as shown
on the table below.
Exhaust Camshaft Bearing Identification Mark
Exhaust Camshaft Bearing Specifications
Cylinder
Head Bore
Class
|
Bearing Class For Installing (Color)
|
Thickness Of Bearing
|
a (A)
|
C (Green)
|
1.996~2.000 mm
(0.07858~0.07874 in.)
|
b (B)
|
B (None color)
|
2.000~2.004 mm
(0.07874~0.07890 in.)
|
c (C)
|
A (Black)
|
2.004~2.008 mm
(0.07890~0.07905 in.)
|
Oil clearance : 0 ~ 0.032 mm
(0 ~ 0.00126 in.)
|
|
1.
Remove the cylinder head cover.
(Refer to Cylinder Head Assembly - "Cylinder Head Cover")
2.
Set No.1 cylinder to TDC/comp ...
1.
Install the intakeCVVT assembly(A), exhaust CVVT assembly(B) and camshaft(C).
Tightening torque :
53.9 ~ 63.7 N.m (5.5 ~ 6.5 kgf.m, 39 ...
See also:
Installation
1.
Install in the reverse order of removal.
If the oil seal on the trans ...
Description
System Overview
The System offers the following features:
-
Human machine interface through a 1-stage button, for terminal
switching and engine start.
...
Adjustment
1.
Operate the horn, and adjust the tone to a suitable level by turning
the adjusting screw.
...
CVVT & Camshaft Removal
CVVT & Camshaft Installation