Kia Cee'd: Cylinder Head Assembly / Valve clearance adjustment
| Valve Clearance Inspection
And Adjustment |
|
Inspect and adjust the valve clearance when the engine is cold (Engine
coolant temperature : 20°C) and cylinder head is installed on the cylinder
block.
|
| 1. |
Remove the cylinder head cover.
(Refer to Cylinder Head Assembly - "Cylinder Head Cover")
|
| 2. |
Set No.1 cylinder to TDC/compression.
| (1) |
Turn the crankshaft pulley and align its groove with the timing
mark of the timing chain cover.
|
| (2) |
Check that the marks of the intake and exhaust CVVT sprockets
are in straight line on the cylinder head surface as shown in
the illustration. If not, turn the crankshaft one revolution
(360°).
|
Do not turn the crankshaft damper pulley counterclockwise.
|
|
| (3) |
Mark the timing chain links corresponding to the timing marks
on the CVVT sprockets with a indelible marker.
|
|
| 3. |
Remove the exhaust oil control valve (OCV) adaptor (A).
|
| 4. |
Inspect the valve clearance.
| (1) |
Check only the intake valves of the 1st and 2nd cylinders and
exhaust valves of the 1st and 3rd cylinders for their clearance.
| •
|
Using a thickness gauge, measure the clearance between
the tappet and the base circle of camshaft.
|
| •
|
Record the out-of-specification valve clearance measurements.
They will be used later to determine the required tappet
for adjusting.
|
|
Valve clearance specification (Engine coolant temperature
: 20°C [68°F])
Limit
Intake : 0.17 ~ 0.23mm (0.0067 ~ 0.0091in.)
Exhaust : 0.22 ~ 0.28mm (0.0087 ~ 0.0110in.)
|
|
| (2) |
Turn the crankshaft pulley one revolution (clockwise 360°) and
align its groove with timing mark of the timing chain cover.
|
| (3) |
Check the intake valves of the 3rd and 4th cylinders and exhaust
valves of the 2nd and 4th cylinders for their clearance.
|
|
| 5. |
Remove the engine mounting support bracket.
| (1) |
Put a jack under the oil pan.
|
Place a wooden block between the jack and the oil pan
to prevent damage to the oil pan.
|
|
| (2) |
Disconnect the ground cable(A), and remove the engine mounting
support bracket(B).
|
| (3) |
Lift the engine slightly using the jack to obtain space for
releasing the timing chain tensioner.
|
|
| 6. |
Adjust the intake and exhaust valve clearance.
| (1) |
Remove the bolt (A) from the service hole in the timing chain
cover.
|
| (2) |
Lock the timing chain tensioner in the fully retracted position.
Insert a pick into the service hole in the timing chain cover
and lower the hole in the left side of the ratchet plate (A)
on the tensioner to allow the pawl (B : located inside the tensioner
behind the rachet plate) to be lifted.
|
| (3) |
Remove the camshaft bearing caps (A) with the order below.
|
| (4) |
With the pawl lifted, have a helper pull up the exhaust CVVT
& camshaft (A) to allow the tensioner plunger (B) to retract.
|
| (5) |
With the tensioner plunger in the fully retracted position,
raise the hole in the left side of the ratchet plate (A) again
through the service hole in the chain cover to align the ratchet
plate hole with the hole in the tensioner body behind the ratchet
plate, then lock the tensioner by inserting the pick through
the ratchet plate and tensioner body holes.
|
| (6) |
Separate the exhaust camshaft (A) from the exhaust CVVT by removing
the bolt.
|
| (7) |
Remove the exhaust CVVT (A) from the timing chain.
|
| (8) |
Remove the intake CVVT & camshaft (A).
|
Fasten the timing chain to the engine hanger with a
cable tie or strap not to allow the timing chain to
fall down when removing the intake CVVT & camshaft.
|
|
| (9) |
Remove the tappet(s) in out-of-specification valve clearance
from the cylinder head.
|
| (10) |
Measure the thickness of the removed tappet using a micrometer.
|
| (11) |
Calculate the thickness of a new tappet so that the valve clearance
comes within the specificified value.
|
Valve clearance (Engine coolant temperature : 20°C)
T : Thickness of removed tappet
A : Measured valve clearance
N : Thickness of new tappet
Intake : N = T + [A - 0.20mm(0.0079in.)]
Exhaust : N = T + [A - 0.25mm (0.0098in.)]
|
|
| (12) |
Select a new tappet with a thickness as close as possible to
the caculated value.
|
Shims are available in 41 size increments of 0.015mm
(0.0006in.) from 3.00mm (0.118in.) to 3.690mm (0.1417in.)
|
|
| (13) |
Place a new tappet on the cylinder head.
|
| (14) |
Install the intake CVVT & camshaft (A), with the timing mark
on the intake CVVT sprocket aligned with the mark (painted link)
on the timing chain.
|
| (15) |
Install the exhaust CVVT (A), with the timing mark on the exhaust
CVVT sprocket aligned with the mark (painted link) on the timing
chain.
|
| (16) |
Install the exhaust camshaft (A) to the exhaust CVVT.
|
Tightening torque : 63.7 ~ 73.5 N.m (6.5 ~ 7.5 kgf.m,
47.0 ~ 54.2 lb-ft)
|
|
| (17) |
Remove the pick from the service hole in the timing chain cover.
|
| (18) |
Check that each timing mark of the intake and exhaust CVVT sprockets
is aligned as shown in the picture.
|
| (19) |
Install the bolt (A) to the service hole in the timing chain
cover.
|
Tightening torque : 27.5 ~ 30.4 N.m (2.8 ~ 3.1 kgf.m,
20.3 ~ 22.4 lb-ft)
|
|
| (20) |
Install the engine mounting support bracket.
| (1)
|
Connect the ground cable (A) and intall the engine mounting
support bracket (B).
|
Tightening torque
Ground line bolt :
10.8 ~ 13.7 N.m (1.1 ~ 1.4 kgf.m, 8.0 ~ 10.1
lb-ft)
Nut (C) :
88.3 ~ 107.9 N.m (9.0 ~ 11.0 kgf.m, 65.1 ~ 79.6
lb-ft)
Bolt (D) and nuts (E) :
58.8 ~ 73.5 N.m (6.0 ~ 7.5 kgf.m, 43.3 ~ 54.2
lb-ft)
|
|
| (2)
|
Remove the jack from the oil pan.
|
|
| (21) |
Install the camshaft bearing caps with the order below.
|
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)
|
|
| (22) |
Turn the crankshaft two turns in the operating direction(clockwise)
and check that the marks of the intake and exhaust CVVT sprockets
are in straight line on the cylinder head surface.
|
| (23) |
Recheck the valve clearance.
|
Valve clearance (Engine coolant temperature : 20°C)
[Specification]
Intake : 0.17 ~ 0.23mm (0.0067 ~ 0.0091in.)
Exhaust : 0.22 ~ 0.28mm (0.0087 ~ 0.0110in.)
|
|
| (24) |
Install the exhaust oil control valve (OCV) adaptor (A).
|
Tightening torque : 9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m,
7.2 ~ 8.7 lb-ft)
|
|
| (25) |
Install the cylinder head cover.
(Refer to Cylinder Head Assembly - "Cylinder Head Cover")
|
|
Components
1. Cylinder head cover
2. Cylinder head cover gasket
3. Cylinder head assembly
4. Cylinder head gasket
5. Camshaft position sensor
...
Components
1. Cylinder head cover
2. Cylinder head cover gasket
3. Cam position sensor
...
Components and components location
Cylinder Head Cover Components and components location