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noise,regardless of
engine speed.Loose or damaged drive plate.
Repair or replace the drive plate.
Damaged oil pan, contacting the oil pump
screen. a.
Inspect the oil pan.
b. Inspect the oil pump screen.
c. Repair or replace as required.
Oil pump screen loose, damaged or
restricted. a.
Inspect the oil pump screen.
b. Repair or replace as required.
Excessive piston- to- cylinder bore clearance. a.Inspect the piston, piston pin and cylinder
bore.
b. Repair as required.
Excessive piston pin- to- piston clearance. a.Inspect the piston, piston pin and the
connecting rod.
b. Repair or replace as required.
Excessive connecting rod bearing clearance Inspect the following components and repair
as required.
a. The connecting rod bearings.
b. The connecting rods.
c. The crankshaft pin journals.
Excessive crankshaft bearing clearance. Inspect the following components, and repair
as required.
a. The crankshaft bearings.
b. The crankshaft main journals.
c. The cylinder block.
Incorrect piston, piston pin and connecting rod
installation a.
Verify the piston pins and connecting rods
are installed correctly.
b. Repair as required.
Engine noise under
load. Low oil pressure
Repair or replace as required.
Excessive connecting rod bearing clearance . Inspect the following components and repair
as required :
a. The connecting rod bearings.
b. The connecting rods.
c. The crankshaft.
Excessive crankshaft bearing clearance. Inspect the following components, and repair
as required.
a. The crankshaft bearings.
b. The crankshaft main journals.
c. The cylinder block.
Engine will not crank-
crankshaft will not
rotate. Hydraulically locked cylinder.
a. Coolant/antifreeze in cylinder.
b. Oil in cylinder.
c. Fuel in cylinder. a.
Remove spark plugs and check for fluid.
b. Inspect for broken head gasket.
c. Inspect for cracked engine block or
cylinder head.
d. Inspect for a sticking fuel injector and/or
leaking fuel regulator.
Broken timing chain and/or timing chain
and/or timing chain gears. a.
Inspect timing chain and gears.
b. Repair as required.
Material in cylinder. a. Broken valve
b. Piston material
c. Foreign material a.
Inspect cylinder for damaged components
and/or foreign materials.
b. Repair or replace as required.
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2007 > 2.7L V6 GASOLINE >
Compression pressure inspection
If the there is lack of power, excessive oil consumption or poor fuel economy, measure the compression
pressure.
1. Warm up the engine until the normal operating temperature becoming 80~95°C(176~203°F).
2. Remove the surge tank.
3. Remove the ignition coil connectors(B) and ignition coils.
4.Using a 16mm plug wrench, remove the 6 spark plugs.
5. Check cylinder compression pressure.
(1) Insert a compression gauge into the spark plug hole.
(2) Open the throttle fully.
(3) With the fully - open throttle in cranking, measure the compression pressure.
Always use a fully charged battery to get the engine speed of 250 rpm or more.
Repeat steps 1) through 3) for each cylinder.
This measurement must be done in as short a time as possible.
Compression pressure: 1,176.79kPa (12.0kgf/cm², 170.68psi) - 200 ~ 250rpm
Minimum pressure: 1,029.69kPa (10.5kgf/cm², 149.34psi)
Difference between cylinders: 98.07kPa (1.0kgf/cm², 14.22psi)
(4) If the compression pressure in 1 or more cylinders is lower than the specification above, pour a small amount
of engine oil into the cylinder through the spark plug hole, repeat the steps (1) through (3) for the cylinder and
measure the pressure again.
a. If adding oil increases the pressure up, the piston rings or cylinder bores might be worn or damaged.
b. If the pressure doesn't increase, a valve may be sticking or seating may be improper, or there may be
leakage from the gasket.
6. Reinstall the spark plugs.
7. Install the ignition coils and connect ignition coil connectors.
8. Install the surge tank.
VALVE CLEARANCE INSPECTION AND ADJUSTMENT
Inspect and adjust the valve clearance when the engine is cold (Engine coolant temperature : 20°C
±5°C(59~77°F)) and cylinder head is installed on the cylinder block.
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1.Remove the engine cover.
2. Remove air cleaner assembly.
3. Remove the surge tank.
4. Remove the cylinder head cover.
(1) Disconnect the ignition coil connector and remove the ignition coil.
(2) Remove the cylinder head cover.
5.Set the piston of the No.1 cylinder to TDC(Top Dead Center) position.
(1) Turn the crankshaft pulley clockwise and align its groove with the timing mark "T" of the timing chain cover.
(2) Check that the timing marks of the camshaft sprocket are in straight line on that of the cylinder head cover
surface as shwn in the illustration. It makes the piston of the No.1 cylinder position at TDC.
If not, turn the crankshaft one revolution clockwise.
6. Inspect the intake and the exhaust valve clearance.
(1) With the piston of the No.1 cylinder positioning at TDC, the valves which can be measured its clearance are as
shown below.
Measurement method.
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 adjusting tappet for replacement.
Page 15 of 1575
N : Thickness of new tappet
Intake : N = T + [A - 0.20mm(0.0079in.)]
Exhaust : N = T + [A - 0.30mm (0.0118in.)]
(8) Select a new tappet with a thickness as close as possible to the calculated value.
Tappets are available with 41different size increments of 0.015mm (0.0006in.) from 3.00mm (0.118in.) to
3.600mm (0.1417in.)
(9) Place a new tappet on the cylinder head.
Apply engine oil on the periphery surface of the selected tappet.
(10) Install the intake and exhaust camshafts.
(11) Install the bearing caps.
(12) Install the timing belt.
(13) Turn the crankshaft two revolutions in the operating direction(clockwise) and realign crankshaft sprocket and
camshaft sprocket timing marks(A).
(14) Recheck the valve clearance.
Specification (Engine coolant temperature: 20°C[68°F])
Intake : 0.17 ~ 0.23mm (0.0067 ~ 0.0090in.)
Exhaust : 0.27 ~ 0.33mm (0.0106 ~ 0.0129in.)
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2007 > 2.7L V6 GASOLINE >
REMOVAL
1.Remove the engine cover.
2. Remove the front right wheel and tire.
3. Remove the right side cover.
4. Remove the drive belt(A), the idler(B) and the tensioner(C).
In removing the drive belt, fix a tool in the auto tensioner pulley bolt and turn the bolt counter clockwise.
5. Remove the timing belt upper cover(A).
6.Align the groove of the pulley with the timing mark of the timing belt cover by turning the crankshaft pulley
clockwise. Check if the timing mark of the camshaft sprocket is aligned with that of the cylinder head cover at the
moment.
(No.1 cylinder piston at TDC)
7.Remove the engine mounting bracket(A).
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6.Remove the auto tensioner set- pin.
7. Check the tension of the timing belt.
(1) Turn the crankshaft 2 rev. clockwise which makes the No.1 cylinder piston position at TDC.
After 5minutes, measure the length of the projected rod.
Specification
5 ~ 7mm(0.1969 ~ 0.2756in.)
(2)Ensure the locations of the timing marks for each sprocket.
8. Install the engine support bracket(A).
Tightening torque
58.8 ~ 68.6Nm(6.0 ~ 7.0kgf.m, 43.4 ~ 50.6lb- ft)
9.Install the timing belt lower cover(A).
Tightening torque
9.8 ~ 11.8Nm(1.0 ~ 1.2kgf.m, 7.8 ~ 8.7lb - ft)
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13.Install the drive belt tensioner(C).
Tightening torque
34.3 ~ 53.9Nm(3.5 ~ 5.5kgf.m, 25.3 ~ 39.8lb- ft)
14. Install the drive belt idler and the drive belt(A).
Tightening torque
34.3 ~ 53.9Nm(3.5 ~ 5.5kgf.m, 25.3 ~ 39.8lb- ft)
15.Install the right side cover.
16. Install the front right wheel and tire.
17. Install the engine cover.
INSPECTION
SPROCKETS, TENSIONER, IDLER
1. Check the camshaft sprocket and crankshaft sprocket, tensioner pulley and idler pulley for abnormal wear, cracks,
or damage. Replace as necessary.
2. Inspect the tensioner and the idler for easy and smooth rotation and check for play or noise. Replace as necessary.
Page 31 of 1575
3.Replace the tensioner and the idler if grease is leaked from bearings.
TIMING BELT
1.Check the belt for oil or dust deposits.
Replace, if necessary.
Small deposits should be wiped away with a dry cloth or paper. Do not clean with solvent.
2. When the engine is overhauled or belt tension adjusted, check the belt carefully. If any of the following flaws are
evident, replace the belt.
a.Do not bend, twist or turn the timing belt inside out.
b. Do not allow the timing belt to come into contact with oil, water and steam.
3. Inspect the idler for easy and smooth rotation and check for play or noise.