Kia Cadenza YG: Timing System / Timing Chain Repair procedures

Kia Cadenza YG 2016-2021 Service Manual / Engine Mechanical System / Timing System / Timing Chain Repair procedures

Removal
1.
Set No.1 cylinder to TDC/compression.
(1)
Turn the crankshaft pulley clockwise and align its groove with the timing mark "T" of the lower timing chain cover.

(2)
Check that the mark of the camshaft timing sprockets are in straight line on the cylinder head surface as shown in the illustration. If not, turn the crankshaft clockwise one revolution (360°).

   
Do not rotate engine counterclockwise.
2.
Remove the timing chain cover.
(Refer to Timing System - "Timing Chain Cover")
   
Be careful not to damage the contact surfaces of cylinder block, cylinder head and timing chain cover.
   
Before removing the timing chain, mark the RH/LH timing chain with an identification based on the location of the sprocket because the identification mark on the chain for TDC (Top Dead Center) can be erased.

3.
Remove the oil pump chain cover (A).

4.
Remove the oil pump chain tensioner assembly (A).

5.
Release the ratchet by pulling the link down using a thin rod. Compress the piston and then insert a stopper pin into the hole on the ratchet to hold the compressed piston.

6.
Remove the RH timing chain cam to cam guide (A).

7.
Remove the RH timing chain auto tensioner (A) and the RH timing chain tensioner arm (B).

8.
Remove the RH timing chain guide (A).

9.
Remove the RH timing chain (A).

10.
Remove the crankshaft sprocket (A) ( RH camshaft drive).

11.
Remove the oil pump chain sprocket (A) and oil pump chain (B).

12.
Remove the crankshaft sprocket (A) (Oil pump drive).

13.
Release the ratchet by pulling the link down using a thin rod. Compress the piston and then insert a stopper pin into the hole on the ratchet to hold the compressed piston.

14.
Remove the LH timing chain cam to cam guide (A).

15.
Remove the LH timing chain auto tensioner (A) and LH timing chain tensioner arm (B).

16.
Remove the LH timing chain guide (A).

17.
Remove the LH timing chain (A).

18.
Remove the crankshaft sprocket (A). (LH camshaft drive).

19.
Remove the tensioner adapter assembly (A).

Inspection
Sprockets, Chain Tensioner, Chain Guide, Chain Tensioner Arm
1.
Check the camshaft sprocket and crankshaft sprocket for abnormal wear, cracks, or damage. Replace as necessary.
2.
Inspect the tensioner arm and chain guide for abnormal wear, cracks, or damage. Replace as necessary.
3.
Check that the tensioner piston moves smoothly when the ratchet pawl is released with thin rod.
Installation
1.
Install the jack to the edge of upper oil pan to support the engine.
   
Insert the rubber block between jack and upper oil pan.
2.
The key (A) of crankshaft should be aligned with the timing mark (B) of block. As a result of this, the piston of No.1 cylinder is placed at the top dead center on compression stroke.

3.
Install the tensioner adapter assembly (A).

4.
Install the crankshaft sprocket (A). (LH camshaft drive).

5.
Install the LH timing chain (A).

   
To install the timing chain with no slack between each shaft (cam, crank), follow the below procedure.
Crankshaft sprocket → Timing chain guide → Exhaust camshaft sprocket → Intake camshaft sprocket.
The timing mark of each sprockets should be matched with timing mark (color link) of timing chain at installing timing chain.
6.
Install the LH timing chain guide (A).
Tightening torque :
19.6 ~ 24.5N.m (2.0 ~ 2.5kgf.m, 14.5 ~ 18.1lb-ft)

7.
Install the LH timing chain auto tensioner (A) and LH timing chain tensioner arm (B).
Tightening torque
A : 9.8 ~ 11.8N.m (1.0 ~ 1.2kgf.m, 7.2 ~ 8.7lb-ft)
B : 18.6 ~ 21.6N.m (1.9 ~ 2.2kgf.m, 13.7 ~ 15.9lb-ft)

8.
Install the LH timing chain cam to cam guide (A).
Tightening torque :
9.8 ~ 11.8N.m (1.0 ~ 1.2kgf.m, 7.2 ~ 8.7lb-ft)

9.
Pull out the pins of LH timing chain auto tensioner.

10.
Install the crankshaft sprocket (A) (Oil pump drive).

11.
Install the oil pump chain sprocket (A) and oil pump chain (B).
Tightening torque :
18.6 ~ 21.6N.m (1.9 ~ 2.2kgf.m, 13.7 ~ 15.9lb-ft)

12.
Install the RH timing chain (A).

   
To install the timing chain with no slack between each shaft (cam, crank), follow the below procedure.
Crankshaft sprocket →Timing chain guide → Intake camshaft sprocket → Exhaust camshaft sprocket.
The timing mark of each sprockets should be matched with timing mark (color link) of timing chain at installing timing chain.
13.
Install the RH timing chain guide (A).
Tightening torque :
A : 19.6 ~ 24.5N.m (2.0 ~ 2.5kgf.m, 14.5 ~ 18.1lb-ft)

14.
Install the RH timing chain auto tensioner (A) and the RH timing chain tensioner arm (B).
Tightening torque
A : 9.8 ~ 11.8N.m (1.0 ~ 1.2kgf.m, 7.2 ~ 8.7lb-ft)
B : 18.6 ~ 21.6N.m (1.9 ~ 2.2kgf.m, 13.7 ~ 15.9lb-ft)

15.
Install the RH timing chain cam to cam guide (A).
Tightening torque :
9.8 ~ 11.8N.m (1.0 ~ 1.2kgf.m, 7.2 ~ 8.7lb-ft)

16.
Pull out the pins of RH timing chain auto tensioner.

17.
Install the oil pump chain tensioner assembly (A).
Tightening torque :
9.8 ~ 11.8N.m (1.0 ~ 1.2kgf.m, 7.2 ~ 8.7lb-ft)

18.
Install the oil pump chain cover (A).
Tightening torque :
9.8 ~ 11.8N.m (1.0 ~ 1.2kgf.m, 7.2 ~ 8.7lb-ft)

19.
After rotating the crankshaft 2 revolutions in regular direction (clockwise viewed from front), confirm the timing mark.
   
Always turn the crankshaft clockwise.
Turning the crankshaft counter clockwise before building up oil pressure in the hydraulic timing chain tensioner may result in the chain disengaging from the sprocket teeth.
20.
Install the timing chain cover.
(Refer to Timing System - "Timing Chain Cover")
21.
Install the other parts reverse order of removal.
   
•
Refill engine oil.
•
Clean the battery posts and cable terminals with sandpaper. Assemble and then apply grease to prevent corrosion.
•
Inspect for fuel leakage.
–
After assembling the fuel line, turn on the ignition switch (do not operate the starter) so that the fuel pump runs for approximately two seconds and fuel line pressurizes.
–
Repeat this operation two or three times, then check for fuel leakage at any point in the fuel lines.
•
Refill radiator and reservoir tank with engine coolant.
•
Bleed air from the cooling system.
–
Start engine and let it run until it warms up. (Until the radiator fan operates 3 or 4 times.)
–
Turn Off the engine and let it cool down. Check the level in the radiator, add coolant if needed. This will allow trapped air to be removed from the cooling system.
–
Put radiator cap on tightly, then run the engine again and check for leaks.

    Components 1. Oil pump chain cover2. Oil pump sprocket3. Oil pump chain 4. Oil pump tensioner assembly5. Crankshaft oil pump sprocket6. Crankshaft RH chain sprocket7.

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