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Kia Sorento: Timing Chain Repair procedures - Timing System - Engine Mechanical SystemKia Sorento: Timing Chain Repair procedures

Kia Sorento (MQ4, 2021-2026) Service Manual / Engine Mechanical System / Timing System / Timing Chain Repair procedures

Removal
1.
Release the residual pressure in fuel line.
(Refer to Fuel Delivery System - "Release Residual Pressure in Fuel Line")
2.
Set No.1 cylinder to TDC. Turn the crankshaft damper pulley clockwise and align its groove with the timing mark "T" of the timing chain cover.

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Removal illustration

3.
Remove the timing chain cover.
(Refer to Timing System - "Timing Chain Cover")
4.
Make sure that the key of crankshaft is aligned with the mounting surface of the lower crankcase in a straight line. Check that the No.1 piston is positioned at the TDC.

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Removal illustration

5.
Check that the timing marks of the intake camshaft sprocket and the exhaust camshaft sprocket are in line.

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Removal illustration

Note
If timing marks are not in line, turn the crankshaft clockwise one revolution (360°).
(Do not rotate engine counterclockwise.)
6.
Release the ratchet by pulling the link of timing chain tensioner down using a thinscrewdriver. Compress the piston and then insert a stopper pin into the hole to fix the piston and then remove the tensioner (A).

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Removal illustration

Note
Be careful not to pop out the piston when removing the tensioner.
7.
Remove the timing chain tensioner arm (A).

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Removal illustration

8.
Remove the timing chain cam to cam guide (A).

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Removal illustration

9.
Remove the timing chain (A).

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Removal illustration

10.
Remove the timing chain guide (A).

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Removal illustration

11.
Remove the crankshaft chain sprocket (A) for the timing chain.

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Removal illustration

Inspection
Sprockets, Chain Tensioner, Chain Guide, Chain Tensioner Arm
1.
Check the CVVT sprocket, crankshaft sprocket teeth for abnormal wear, cracks or damage.Replace if necessary.
2.
Check a contact surface of the chain tensioner arm and guide for abnormal wear, cracks ordamage. Replace if necessary.
3.
Check that the chain tensioner piston slides smoothly and inspect whether the ratchetoperates normally. Replace if necessary.
Installation
1.
Install the crankshaft chain sprocket (A) for the timing chain.

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Installation illustration

2.
Make sure that the key of crankshaft is aligned with the mouting surface of the lower crankcase. Ensure that the TDC mark on the front of the intake/exhaust CVVT sprockets match with the top of the cylinder head.

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Installation illustration

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Installation illustration

3.
Install the timing chain guide (A).
Tightening torque :
9.8 - 11.7 N·m (1.0 - 1.2 kgf·m , 7.2 - 8.6 lb·ft)

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Installation illustration

4.
Install the timing chain (A).
Crankshaft sprocket → Timing chain guide → Intake CVVT sprocket → Exhaust CVVT sprocket.

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Installation illustration

Note
When installing the timing chain, be sure that the timing mark of each sprocket is matched with the timing mark (color link) of the timing chain
[Intake CVVT]

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Installation illustration

[Exhaust CVVT]

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Installation illustration

[Crankshaft]

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Installation illustration

5.
Install the timing chain cam to cam guide (A).
Tightening torque :
9.8 - 11.7 N·m (1.0 - 1.2 kgf·m , 7.2 - 8.6 lb·ft)

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Installation illustration

6.
Install the timing chain tensioner arm (A)
Tightening torque :
9.8 - 11.7 N·m (1.0 - 1.2 kgf·m , 7.2 - 8.6 lb·ft)

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Installation illustration

7.
Install the timing chain auto tensioner (A) and pull out pins.
Tightening torque :
9.8 - 11.7 N·m (1.0 - 1.2 kgf·m , 7.2 - 8.6 lb·ft)

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Installation illustration

8.
Rotate the crankshaft 2 revolutions in clockwise direction. Ensure that the TDC mark on the front of the intake/exhaust CVVT sprockets match with the top of the cylinder head.

Engine Mechanical System — Timing System / Timing Chain / Repair procedures / Installation illustration

Note
If timing marks are not in line, turn the crankshaft clockwise one revolution (360°).
(Do not rotate engine counterclockwise.)
9.
Install the timing chain cover.
(Refer to Timing System - "Timing Chain Cover")
Timing Chain Cover Repair procedures
Removal This working procedure does not require engine removal. ...
Engine Electrical System
...
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