Hyundai Palisade (LX2): Cylinder Head Assembly / Valve clearance adjustment

Hyundai Palisade (LX2) 2020-2026 Service Manual / Engine Mechanical System / Cylinder Head Assembly / Valve clearance adjustment

Valve Clearance Inspection and Adjustment (MLA)

•	Inspect and adjust the valve clearance with engine cold (engine coolant temperature : 20°C (68°F)) and cylinder head installed to the cylinder block.

1.	Remove the cylinder head cover. (Refer to Cylinder Head Assembly - "Cylinder Head Cover")

Set No.1 cylinder to TDC / compression.

(1)	Turn the crankshaft damper 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°).

[LH intake]

Hyundai Palisade. Valve clearance adjustment

[LH exhaust]

Hyundai Palisade. Valve clearance adjustment

[RH intake]

Hyundai Palisade. Valve clearance adjustment

[RH exhaust]

Hyundai Palisade. Valve clearance adjustment

•	Do not rotate engine counterclockwise.

Inspect the valve clearance.

(1)

With No.1 cylinder at TDC, inspect clearances only for the valves shown below.

[LH]

Hyundai Palisade. Valve clearance adjustment

[RH]

Hyundai Palisade. Valve clearance adjustment

How to Measure :

a.	Using a thickness gauge, measure the clearance between the tappet and the base circle of camshaft.

b.	Record the out-of-specification valve clearance measurements. They will be used later to determine the required replacement adjusting tappet.

Valve clearance (Engine coolant temperature : 20°C [68°F])

[Specification]

Intake : 0.10 - 0.30 mm (0.0039 - 0.0118 in.)

Exhaust : 0.20 - 0.40 mm (0.0079 - 0.0157 in.)

(2)	Turn the crankshaft pulley clockwise one revolution (360°) and align the groove with timing mark "T" of the lower timing chain cover.

(3)	With the No.4 cylinder at TDC, inspect clearances only for the valves shown in diagram below. (Refer to procedure step 1.) [LH] [RH]

Adjust the intake and exhaust valve clearance.

(1)	Set the No.1 cylinder to the TDC/compression.

(2)	Remove the camshaft assembly. (Refer to Cylinder Head Assembly - "CVVT & Camshaft")

(3)	Remove the tappets.

(4)	Measure the thickness of the removed tappet using a micrometer.

(5)

Calculate the thickness of a new tappet so that the valve clearance comes within the specified value.

T : Thickness of removed tappet

A : Measured valve clearance

N : Thickness of new tappet

Intake : N = T + [A - 0.20 mm (0.0079 in.)]

Exhaust : N = T + [A - 0.30 mm (0.0118 in.)]

(6)

Select a new tappet with a thickness as close as possible to the calculated value.

•	Shims are available in 41 size increments of 0.015 mm (0.0006 in.) from 3.00 mm (0.1181 in.) to 3.60 mm (0.1417 in.).

(7)

Place a new tappet on the cylinder head.

•	Apply engine oil around and on top of selected tappet.

(8)	Install the intake and exhaust camshafts.

(9)	Install the bearing caps. (Refer to Cylinder Head Assembly - "CVVT & Camshaft")

(10)	Install the timing chain. (Refer to Timing System - "Timing Chain")

(11)	Make two turns on the crankshaft in the operating direction (clockwise) and realign crankshaft sprocket and camshaft sprocket timing marks. [LH intake] [LH exhaust] [RH intake] [RH exhaust]

(12)

Recheck the valve clearance.

Valve clearance (Engine coolant temperature : 20°C [68°F])

[Specification]

Intake : 0.17 - 0.23 mm (0.0067 - 0.0090 in.)

Exhaust : 0.27 - 0.33 mm (0.0106 - 0.0129 in.)

❮Cylinder Head Assembly

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