How to disassembling and assembling the Cylinder

How to disassembling and assembling the cylinder head of Hyundai Trajet 2.7

Model:Hyundai Trajet

Year Model:2007

Fuel: Gasoline

Displacement: 2700cc

How to disassembling and assembling the cylinder head of Hyundai Trajet.

2007  G 2.7 V6 DOHC  Engine Mechanical System

Study DISASSEMBLY

1Study .Remove the engine cover and intake manifold.

2.Study Disconnect the breather hose and the engine harness.

3.Study Remove the power steering pulley, air conditioner pulley, crankshaft pulley, idler pulley and tensioner pulley.

4.Study Remove the timing belt cover.

5.Study Loosen the auto tensioner.

6.Study Remove the timing belt from the camshaft sprocket.

7.Study Remove the spark plug cables.

8.Study Loosen the cylinder head cover bolts and then remove it.

1.Study Remove the camshaft sprocket.

2.Study Remove the camshaft bearing caps.

3.Study Remove the camshaft.

 

STUDY REASSEMBLY

1.Study Install the HLA.

2.Study Align the camshaft timing chain with the intake timing chain sprocket and exhaust timing chain sprocket as shown in the illustration.

1.Study Install the camshaft after lubricating the journal of camshaft with engine oil.

Pull-off force between camshaft (IN) and timing chain sprocket should be 1000kg (MIN.) at room temperature.

2.Study Install the bearing caps. Check the markings on the caps for intake/exhaust identification symbol.

I: Intake camshaft

E: Exhaust camshaft

3.Study Tighten the bearing caps to the specified torque in two or three steps as shown.

Tightening torque

Bearing cap bolt :

M 10 : 14-16 Nm(140-160 kg.cm, 10-12 lb.ft)

M 7 : 10 -12 Nm(100-120 kg.cm, 7-9 lb.ft)

4.Study Using the special tool, the camshaft oil seal installer (09221-21000), press the camshaft oil seal. Be sure to apply engine oil to the external surface of the oil seal.

Insert the oil seal along the camshaft front end and install by with a hammer until it is fixed.

5.Study Install the camshaft sprocket to the specified torque.

Tightening torque

Camshaft sprocket bolt :

90-110Nm(900-1100kg.cm, 65-80lb.ft)

6.Study Install the cylinder head cover.

Tightening torque

Cylinder head cover bolts :

5-6Nm(50-60kg.cm, 3.6-4.4 lb.ft)

1) Study Tighten all bolts with temporary torque.(half of the standard torque) in the sequence of 1.2.3.4.5.6.7.8

2)Study Tighten all bolts with standard torque.

7.Study Install the spark plug cables, center cover.

8.Study Install the timing belt and then tighten the auto tensioner pulley.

9.Study Install the timing belt cover.

10.Study Install the power steering pulley, air conditioner pulley, crankshaft pulley and tensioner pulley.

1.Study Install the intake manifold and engine cover.

2.Study Connect the breather hose and engine harness.

 

INSPECTION

Camshafts

1.Study Check the camshaft journals for wear. If the journals are badly worn out, replace the camshaft.

2.Study Check the cam lobes for damage. If the lobe is damaged or excessively worn out, replace the camshaft.

Cam height

[Standard]

Intake : 43.95-44.15 mm(1.7303-1.7382 in.)

Exhaust : 43.95-44.15mm(1.7303-1.7382 in.)

[Limit]

Intake/Exhaust : 43.45mm(1.7106 in.)

1.Study Check the cam surface for abnormal wear or damage, and replace if necessary.

2.Study Check each bearing for damage. If the bearing surface is excessively damaged, replace the cylinder head assembly or camshaft bearing cap, as necessary.

Camshaft end play : 0.1-0.15mm(0.0039-0.0059 in.)

Oil Seal (Camshaft front)

1.Study Check the lips for wear. If lip threads are worn out, replace the oil seal with new one.

2Study .Check a contact surface of oil seal lip on camshaft. If there stratified wear, replace the camshaft.

HLA (Hydraulic Lash Adjuster)

Problem
Possible cause
Action

1.Study Temporary noise when starting a cold engine
Normal
This noise will disappear after the oil in the engine reaches the normal pressure.

2.Study Continuous noise when engine is started after parking more than 48 hours.
Oil leakage of the high pressure chamber on the HLA,allowing air to get in.
Noise will disappear within 15 minutes when engine runs at 2000-3000 rpm.
If it doesn't disappear,refer to step 7 below.

3.Study Continuous noise when engine is first started after rebuilding cylinder head.
Insufficient oil in cylinder head oil gallery.

4.Study Continuous noise when engine is started after excessivly craking the engine by the starter motor or band.
Oil leakage of the high-pressure chamber in the HLA, allowing air to get in.
Insufficient oil in the HLA,

5.Study Continuous noise when engine is running after changing the HLA.

Do not run engine at a speed higher than 3000 rpm, as this may damage the HLA.

6.Study Continuous noise during idle after high running speed.
Engine oil level too high or too low.
Check oil level.
Drain or add oil as necessary.

Excessive amount of air in the oil at high engine speed.
Check oil supply system

Deteriorated oil.
Check oil quality.
If deteriorated, replace with specitied type and amount of oil.

7.Study Noise cotinues for more than 15 minutes.
Low oil pressure.
Check oil pressure and oil supply system of each part of engine.

Faulty HLA.
Remove the cylinder head cover and press HLA down by hand.
If it moves, replace the HLA.

 

Be careful with hot HLA.

Timing chain

 

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