Part 1 of 2

REMOVAL

CAUTION:
- Use fender covers to avoid damaging painted surfaces.
- To avoid damaging the cylinder head, wait until the engine coolant temperature drops below normal temperature before removing it.
- When handling a metal gasket, take care not to fold the gasket or damage the contact surface of the gasket.
- To avoid damage, unplug the wiring connectors carefully while holding the connector portion.

NOTE:
- Mark all wiring and hoses to avoid misconnection.
- Turn the crankshaft pulley so that the No. 1 piston is at top dead center.

1. Remove the terminals(A) and the battery(B).




2. Remove the air duct(A).




3. Remove the engine cover.
4. Remove the air cleaner assembly.
(1) Remove the power train control module (PCM) cover (D).
(2) Disconnect the power train control module (PCM) connector (F).
(3) Disconnect the MAF connector (A).
(4) Disconnect the breather hose (B) from air cleaner hose.
(5) Remove the air cleaner assembly.








5. Remove the upper radiator hose(A) and lower radiator hose(B).




6. Remove the fuel inlet hose(A) from the delivery pipe.




7. Disconnect the engine wiring harness connectors.
(1) Disconnect the No.1/No.2 knock sensor connectors(A,B), the oil pressure switch connector(C), the ignition coil harness(D) and the No.1 VIS(Variable Induction System) connector(E).




(2) Disconnect the bank 1 front/rear O2 sensor connectors(A).




(3) Disconnect the injection connectors(A,B,C), the ground lines(D), the condenser connector(E) and the Ignition coil connectors(F).




(4) Disconnect the injection harness connector(A), the No.2 VIS(Variable Induction System) connector(B), the No.1/No.2 OCV(Oil Control Valve) connectors(C,D) and the OTS(Oil Temperature Sensor) connector(E).




(5) Disconnect the MAP(Manifold Absolute Pressure Sensor) connector(A), the ETC(Electronic Throttle Control) connector(B) and the PCSV(Purge Control Solenoid Valve) connector(C).








(6) Disconnect the generator connector(A) and the air conditioning compressor connector(B).




(7) Disconnect the bank 2 CMP sensor connector(A) and the ECT(Engine Coolant Temperature) sensor connector(B).




(8) Disconnect the bank 2 front/rear O2 sensor connectors(A,B) and the CKP sensor connector(C).




(9) Disconnect the bank 1 CMP sensor connector(A).




8. Remove the PCV(Purge Control Valve) hose(A).




9. Disconnect the brake vacuum hose(A).




10. Remove the heater hoses(A).




11. Remove the drive belt(A).




12. Remove the power steering pump. .
13. Remove the exhaust manifold assembly. .
14. Remove the intake manifold assembly. .
15. Remove the timing belt. .
16. Remove the ignition coils.
17. Remove the water temp. control assembly.
18. Remove the cylinder head cover(A).




19. Remove the camshaft bearing cap(A).




20. Remove the timing chain tensioner(A).




21. Remove the camshaft.
22. Remove the bank 2 timing belt rear cover(A).




23. Remove the bank 1 timing belt rear cover(A).




24. Remove the CKP sensor connector bracket(A).




25. Remove the cylinder head assembly.
(1) Remove the bolts in 2 - 3 steps as following orders.





CAUTION:
Cylinder head damage may result if the bolts are not removed in the specified order.

(2) Put the cylinder head assembly on a wooden block after removal from the cylinder block.

CAUTION:
Ensure that the surface between the cylinder head and the block is not damaged.

REPLACEMENT

Valve guide
1. Using the SST(09221-3F100), remove the valve guide from the downside of the cylinder head assembly.




2. Reprocess the valve guide hole for the oversized valve guide newly installed.
3. Using the SST(09221-3F100), insert the valve guide in the upside of the cylinder head assembly. Be aware of the difference in length between the intake and the exhaust valve guides.

Specification
Intake valve guide: 45.8 - 46.2mm(1.8031 - 1.8189in.)
Exhaust valve guide: 46.8 - 47.2mm(1.8425 - 1.8583in.)




4. After installing the valve guides, insert new valves and check the clearance between the valve stems and the valve guides.
5. After replacing the valve guides, check if they are properly installed with the valve seats. Reprocess valve seats if necessary.

DISASSEMBLY

NOTE:
Identify MLA(Mechanical Lash Adjuster), valves and valve springs as they are removed so that each item can be reinstalled in its original position.

1. Remove MLA(Mechanical Lash Adjuster)s(A).




2. Remove valves.
(1) Using SST(09222-3K000, 09222-3C300), compress the valve spring and remove retainer lock.




(2) Remove the spring retainer.
(3) Remove the valve spring.
(4) Remove the valve.
(5) Using SST(09222-29000), remove the valve stem seal.





NOTE:
Do not reuse the removed valve stem seals.

3. Remove OCV(Oil Control Valve)(A).






INSPECTION

CYLINDER HEAD
1. Inspect for flatness.
Using a precision straight edge and feeler gauge, measure the surface contacting cylinder block and the manifolds for warpage.

Flatness of cylinder head gasket surface
Standard : 0.03mm(0.0012in.) or less
Flatness of manifold gasket surface
Standard : 0.15mm(0.0059in.) or less




2. Inspect for cracks.
Check the combustion chamber, intake ports, exhaust ports and cylinder block surface for cracks. If cracked, replace the cylinder head.

VALVE AND VALVE SPRING
1. Inspect valve stems and valve guides.
(1) Using a caliper gauge, measure the inside diameter of the valve guide.

Valve guide inside diameter
Intake / Exhaust : 6.000 - 6.015mm (2.2362 - 2.2368in.)




(2) Using a micrometer, measure the outer diameter of the valve stem.

Valve stem outer diameter
Intake : 5.965 - 5.980mm (0.2348 - 0.2354in.)
Exhaust : 5.950 - 5.565mm (0.2343 - 0.2348in.)




(3) Calculate the clearance between the valve guides and the stems by difference between the valve stem measured diameter and the valve guide measured inside diameter.

Valve stem-to-guide clearance
[Standard]
Intake : 0.020 - 0.050mm (0.0008 - 0.0020in.)
Exhaust : 0.035 - 0.065mm (0.0014 - 0.0026in.)
[Limit]
Intake : 0.10mm (0.0039in.) or less
Exhaust : 0.13mm (0.0051in.) or less

2. Inspect valves.
(1) Check the valve face angle.
(2) Check that the surface of the valve for wear.
If the valve face is worn, replace the valve.
(3) Check the valve head margin thickness.
If the margin thickness is less than the specification, replace the valve.

Specification
Intake : 1.0mm(0.0394in.)
Exhaust : 1.3mm(0.0512.)




(4) Check the valve length.

Length
Intake : 110.1mm(4.3346in)
Exhaust : 111.1mm(4.3740in)

(5) Check the surface of the valve stem tip for wear.
If the valve stem tip is worn, replace the valve.
3. Inspect valve seats
(1) Check the valve seat for evidence of overheating or improper contact with the valve face.
If the valve seat is worn, replace cylinder head.
(2) Before reconditioning the seat, check the valve guide for wear. If the valve guide is worn, replace the valve guide first.
(3) Recondition the valve seat with a valve seat grinder or cutter. The valve seat contact width should be within specifications and centered on the valve face.
4. Inspect valve springs.
(1) Using a steel square, measure the out-of-square of the valve spring.
(2) Using vernier calipers, measure the free length of the valve spring.

Valve spring
[Standard]
Free height : 46.8mm (1.8425in.)
Out-of-square : 1.5° or less





MLA(Mechanical Lash Adjuster)
1. Inspect MLA.
Using a micrometer, measure the MLA outside diameter.

MLA O.D.
Intake/Exhaust : 29.964 - 29.980mm(1.1797 - 1.1803in.)

2. Using a caliper gauge, measure MLA tappet bore inner diameter of cylinder head.

Tappet bore I.D.
Intake/Exhaust : 30.000 - 30.025mm(1.1811 - 1.1821in.)

3. Calculate the clearance by subtracting MLA outside diameter measurement from tappet bore inside diameter measurement.

MLA to tappet bore clearance
[Standard]
Intake/Exhaust : 0.020 - 0.061mm(0.0008 - 0.0024in.)
[Limit]
Intake/Exhaust : 0.07mm(0.0027in.) or less

CAMSHAFT
1. Inspect cam lobes.
Using a micrometer, measure the cam lobe height.

Cam height
[Standard value]
Intake : 44.5mm (1.7520in.)
Exhaust : 44.5mm (1.7520in.)




If the cam lobe height is less than standard, replace the camshaft.
2. Check the cam lobe surface for wear or damage. If necessary, replace it.
3. Inspect camshaft journal clearance.
(1) Clean the bearing caps and camshaft journals.
(2) Place the camshafts on the cylinder head.
(3) Lay a strip of plastigage across each of the camshaft journals.




(4) Install the bearing caps with the tightening torque.

CAUTION:
Do not turn the camshaft.

(5) Remove the bearing caps.
(6) Measure the plastigage at its widest point.

Bearing oil clearance
[Standard value]
Intake : 0.030 - 0.057mm (0.0012 - 0.0022in.)
Exhaust : 0.030 - 0.057mm (0.0012 - 0.0022in.)




If the oil clearance is greater than the maximum, replace the camshaft. If necessary, replace the cylinder head.
(7) Completely remove the plastigage.
(8) Remove the camshafts.
4. Inspect camshaft end play.
(1) Install the camshafts.
(2) Using a dial indicator, measure the end play while moving the camshaft back and forth.

Camshaft end play
[Standard value] : 0.1 - 0.2mm(0.0039 - 0.0079in.)




If the end play is greater than the maximum, replace the camshaft. If necessary, replace the cylinder head.
(3) Remove the camshafts.

CVVT ASSEMBLY
1. Inspect CVVT assembly.
(1) Fix the CVVT assembly with a vice. Ensure that the cam lobe and journal is not damaged.
(2) Check that the CVVT assembly will not turn.
It should not be turned.
(3) Apply vinyl tape to the retard hole except the one(A) indicated by the arrow in the illustration.




(4) Wind tape around the tip of the air gun and apply air of approx. 150kpa(1.5kgf/cm2, 21psi) to the port of the camshaft.
(Perform this in order to release the lock pin for the maximum delay angle locking.)

NOTE:
When the oil splashes, wipe it off with a shop rag.

(5) After the lock pin released, the CVVT assembly can turned in advanced direction.
(6) Except the position where the lock pin meets at the maximum delay angle, let the CVVT assembly turn back and forth and check the movable range and that there is no resistance to movement.

Standard: Movable smoothly in the range about 60°

(7) Turn the CVVT assembly with your hand in retard direction and lock it at the maximum delay angle position.






REASSEMBLY

NOTE:
- Thoroughly clean all parts to be assembled.
- Before installing the parts, apply fresh engine oil to all sliding and rotating surfaces.
- Replace oil seals with new ones.

1. Install valves.
(1) Using SST(09222-22001), push in a new valve stem seal while applying engine oil.





NOTE:
- Do not reuse old valve stem seals.
Incorrect installation of the seal could result in oil leakage past the valve guides.
- Reassemble the valve stem seals

(2) After applying engine oil on the outer surface of each valve stem, insert the valve in the valve guide.
Install the valve, valve spring and spring retainer.

NOTE:
When installing valve springs, the side coated with enamel should face toward the valve spring retainer

(3) Using the SST(09222 - 3K000, 09222-3C300), compress the springs and install the retainer locks. After installing the valves, ensure that the retainer locks are correctly in place before releasing the valve spring compressor.




(4) Lightly tap the end of each valve stem two or three times with the wooden handle of a hammer to ensure proper seating of the valve and retainer lock.
2. Install MLAs with engine oil applied on its surface.
Check that the MLA rotates smoothly by hand.





NOTE:
MLA should be reinstalled in its original position.

3. Install OCV(Oil Control Valve)(A).

Tightening torque
7.8 - 9.8Nm(0.8 - 1.0kgf.m, 5.8 - 7.2lb-ft)





NOTE:
- To install OCV with gray colored connector into RH bank.
- To install OCV with black colored connector into LH bank.

CAUTION:
- Do not reuse the OCV when dropped.
- Keep clean the OCV.
- Do not hold the OCV sleeve during servicing.
- When the OCV is installed on the engine, do not move the engine while holding the OCV yoke.
- Remove any dust from the OCV prior to installation.