2011 FORD KUGA exhaust

Noise, Vibration and Harshness (NVH)
Inspection and Verification
1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanicalor electrical damage.
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible)
before proceeding to the next step.
4. If the concern is not visually evident, verify the symptom and REFER to the Symptom Chart.
How to Use this Diagnostic Procedure
Section
• Noise, vibration and harshness (NVH) concernshave become more important as vehicles have
become more sensitive to these vibrations. This
section is designed to aid in identifying these
concerns.
• The section provides diagnostic procedures based on symptom. If the condition occurs at
high speed, for instance, the most likely place
to start is under Shake and Vibration While
Driving.
• The road test procedure will tell how to sort the conditions into categories and how to tell a
vibration from a shake.
• A series of Road Test Quick Checks are provided to make sure that a cause is either
pinpointed or eliminated.
• Name the condition, proceed to the appropriate section and locate the correct diagnosis. When
the condition is identified, the job is partly done.
• Follow the diagnostic procedure as outlined.
• Quick Checks are described within the step, while more involved tests and adjustments are
outlined in General Procedures.
• Always follow each step exactly and make notes to recall important findings later.
Customer Interview
The road test and customer interview (if available)
provide information that will help identify the
concern and will provide direction to the correct
starting point for diagnosis.
Identify the Condition
NVH usually occur in four areas:
• tires
• engine accessories
• suspension
• driveline
It is important, therefore, that an NVH concern be
isolated into its specific area(s) as soon as
possible. The easiest and quickest way to do this
is to carry out the Road Test as outlined. To assist
in the diagnosis and testing procedure(s), use a
suitable approved NVH diagnosis tester.
Noise Diagnostic Procedure
Non-Axle Noise
The five most common sources of non-axle noise
are exhaust, tires, roof racks, trim panels and
transmission.
Therefore, make sure that none of the following
conditions are the cause of the noise before
proceeding with a driveline teardown and
diagnosis.
• In certain conditions, the pitch of the exhaustmay sound very much like gear noise. At other
times, it can be mistaken for a wheel bearing
rumble.
• Tires, especially snow tires, can have a high pitched tread whine or roar, similar to gear
noise. Radial tires may have this characteristic.
Also, any non-standard tire with an unusual
tread construction may emit a roar or whine
noise.
• Trim panels can also cause whistling or whining noise.
• Clunk may be a metallic noise heard when the automatic transaxle is engaged in "R"
(REVERSE) or "D" (DRIVE) or it may occur
when the throttle is applied or released. It is
caused by backlash somewhere in the driveline.
• Bearing rumble sounds like marbles being tumbled. This condition is usually caused by a
damaged wheel bearing.
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Noise, Vibration and Harshness
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Action
Possible Sources
Symptom
Certain amount of noise level
acceptable, not a safety critical
item.
Steering wheel to shroud interfer-
ence.
Power steering system grinding
noise – an abrasive noise (like
sand paper rubbing against
wood) occurs between moving
components such as steering
wheel and the steering column
shroud. Certain amount of noise level
acceptable, not a safety critical
item.
Steering column bearing.
CHECK if floor covering is
obstructing the steering gear
pinion.
Foreign material in contact with
the steering column shaft.
CHECK the installation of the
floor seal.
CHECK the clockspring and
secure if necessary.
REFER to:Clockspring (501-20
Supplemental Restraint
System, Removal and Installa-
tion).
Clockspring.
Power Steering Zip Noise
Action
Possible Sources
Symptom
Certain amount of noise level
acceptable, not a safety critical
item.
High viscosity of power steering
fluid at low temperature.
Power steering system zip noise
– occurs when hydraulic fluid
does not flow freely through the
power steering pump supply hose
from steering fluid reservoir to
power steering pump causing
cavitation at the pump. Zip is
primarily a cold weather start-up
phenomenon (below -10°C). BLEED the power steering
system.
REFER to:
Power Steering
System Vacuum Bleeding (211-
00 Steering System - General
Information, General Proced-
ures).
Aeration of the power steering
fluid.
Driveline Noise and Vibration
Action
Possible Sources
Symptom
GO toPinpoint Test A.
• Wheel end vibration.
• Engine/transmission.
Shake and vibration while driving
GO toPinpoint Test B.
• Air cleaner.
• Power assisted steering.
• Powertrain.
• Powertrain/drivetrain mounts.
• Exhaust system.
Tip-in moan
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Action
Possible Sources
Symptom
GO toPinpoint Test C.
• Cable(s)/hose(s).
• Powertrain/drivetrain mounts.
• Exhaust system.
• Belt/pulleys.
Idle boom/shake/vibration/
shudder
Suspension Noise and Vibration
Action
Possible Sources
Symptom
GO toPinpoint Test D.
• Suspension.
• Wheel bearings.
Wheel end vibration analysis
GO toPinpoint Test E.
• Trim panels.
• Air conditioning (A/C) system.
• Accessories.
Non-axle noise
Pinpoint Tests
NOTE:
These Pinpoint Tests are designed to take
the technician through a step-by-step diagnosis
procedure to determine the cause of a condition.
It may not always be necessary to follow the chart
to its conclusion. Carry out only the pinpoint test steps necessary to correct the condition. Then
check the operation of the system to make sure
the condition has been corrected.
After verifying that the condition has been
corrected, make sure all components removed
have been installed.
PINPOINT TEST A : SHAKE AND VIBRATION WHILE DRIVING
DETAILS/RESULTS/ACTIONS
TEST CONDITIONS
A1: NEUTRAL COAST
1 Carry out the neutral coast test.
• Does the vibration disappear during the neutral coast test?
zYe s
GO to A2.
zNoGO to Pinpoint Test D.
A2: CHECK THE POWERTRAIN/DRIVETRAIN MOUNTS
1 Carry out the powertrain/drivetrain mount neut-
ralizing procedure
• Are the mounts OK?
zYe s Vehicle condition corrected. ROAD TEST as
necessary.
zNoINSTALL new powertrain/drivetrain mounts
as necessary. ROAD TEST as necessary.
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PINPOINT TEST B : TIP-IN MOAN
DETAILS/RESULTS/ACTIONS
TEST CONDITIONS
B1: CHECK THE AIR CLEANER
1 Check the condition of the air cleaner mounts,
inlet tube, outlet tube, resonators and all other
components associated with the air induction
system for correct installation and tightness of
all connections.
• Are the components OK?
zYe s GO to B2.
zNoREPAIR or INSTALL new components as
necessary. ROAD TEST as necessary.
B2: CHECK THE EXHAUST SYSTEM
1 Carry out the exhaust system neutralizing
procedure.
• Is the exhaust system OK?
zYe s GO to B3.
zNoREPAIR as necessary. ROAD TEST as
necessary.
B3: CHECK THE POWER STEERING
1 Remove the accessory drive belt and test for
tip-in moan. REFER to:
Accessory Drive Belt (303-05 Accessory Drive
- 2.5L Duratec (147kW/200PS) - VI5, Removal
and Installation),
• Is the tip-in moan OK?
zYe s REPAIR the power steering as necessary.
REFER to: Steering System (211-00 Steering
System - General Information, Diagnosis
and Testing).
zNo
GO to B4.
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DETAILS/RESULTS/ACTIONS
TEST CONDITIONS
C3: CHECK THE EXHAUST SYSTEM
1 Carry out the exhaust system neutralizing
procedure.
• Is the exhaust system OK?
zYe s GO to C4 .
zNo
REPAIR as necessary. ROAD TEST as
necessary.
C4: CHECK THE POWERTRAIN/DRIVETRAIN MOUNTS
1 Carry out the powertrain/drivetrain mount neut-
ralizing procedure
• Are the powertrain/drivetrain mounts OK?
zYe s Vehicle condition corrected. ROAD TEST as
necessary.
zNoINSTALL new powertrain/drivetrain mounts
as necessary. ROAD TEST as necessary.
PINPOINT TEST D : WHEEL END VIBRATION ANALYSIS
DETAILS/RESULTS/ACTIONS
TEST CONDITIONS
D1: INSPECT THE WHEELS AND TIRES
1 Inspect the wheels and tires.
REFER to:
Wheels and Tires (204-04 Wheels
and Tires, Diagnosis and Testing).
• Are the wheels and tires OK?
zYe s GO to D2 .
zNo
INSTALL new wheels or tires as necessary.
REFER to: Wheel and Tire (204-04 Wheels
and Tires, Removal and Installation).
ROAD TEST as necessary.
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Programmable fuel fired booster heater
Description
Item
Fuel powered booster heater
1
Fresh air inlet
2
Coolant intake
3
Connector for the booster heater
4 Description
Item
Coolant exhaust
5
Fuel intake
6
Holder for the fuel-fired booster heater
7
Exhaust System
8
Coolant Pump
9 G1066978en
2008.50 Kuga 8/2011 412-02-3
Auxiliary Climate Control
412-02-3
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Front Stabilizer Bar(14 752 0)
Special Tool(s) / General Equipment205-316A
Alignment Pins, Subframe
15097A
Hydraulic Press
Transmission Jack
Removal
NOTE:Removal steps in this procedure may
contain installation details.
1. Refer to: Wheel and Tire (204-04 Wheels and
Tires, Removal and Installation).
2.
E98543
x7
3. If equipped.
Torque: 8
Nm
E75215
4. CAUTION: Make sure that the ball joint
ball does not rotate.
On both sides.
Torque: 47.5
Nm
E91648
5. CAUTION: Make sure that the exhaustflexible pipe is not forcibly bent.
E98334
6.
E98346
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Front Suspension
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DETAILS/RESULTS/ACTIONS
TEST CONDITIONS
F2: CHECK FOR BRAKE PEDAL BINDING
1 Check the brake pedal for free operation.
• Did the brake pedal operate freely?
zYe s INSTALL a new brake booster. TEST the
system for normal operation.
zNoINSTALL new brake pedal bushings. TEST
the system for normal operation.
Component Tests
Hydraulic Leak Check
NOTE: There is a common clutch and brake fluid
reservoir, therefore it is possible that a clutch leak
can lead to reduction in the reservoir level.
It is possible that all evidence of fluid leakage may
have washed off if the vehicle has been operated
in rain or snow, as brake fluid is water-soluble.
Refill the system, bleed then apply the brakes
several times. Examine the system to verify that
the reservoir fluid level is actually dropping. Locate
and repair the external leak. If the fluid level drops
and no external leak can be found, check for a
brake master cylinder bore end seal leak.
Brake System Check
Brake Pedal Reserve Check
Where a low brake pedal or the feel of a
bottomed-out condition exists, check for brake
pedal reserve.
1. Operate the engine at idle with the transaxle in the NEUTRAL position.
2. Apply the brake pedal lightly three or four times.
3. Allow 15 seconds for the vacuum to replenish the brake booster.
NOTE: This increased resistance may feel like
something has bottomed out.
4. Apply the brake pedal until it stops moving downward or an increased resistance to the
pedal travel occurs. 5. Hold the brake pedal in the applied position and
raise the engine speed to approximately 2000
rpm.
NOTE: The additional movement of the brake pedal
is the result of the increased engine manifold
vacuum which exerts more force on the brake
booster during engine rundown. This means that
additional stroke is available in the brake master
cylinder and the brake system is not bottoming out.
6. Release the accelerator pedal and observe that the brake pedal moves downward as the engine
returns to idle speed.
Brake Booster Functional Test
Inspect all hoses and connections. All unused
vacuum connectors should be capped. Hoses and
their connections should be correctly secured and
in good condition with no holes and no collapsed
areas. Inspect the check valve on the brake booster
for damage.
Brake Booster Operation Check
1. Check the hydraulic brake system for leaks orlow fluid.
2. With the transaxle in the NEUTRAL position, stop the engine and apply the parking brake.
Apply the brake pedal several times to exhaust
all the vacuum in the system.
3. With the engine turned off and the vacuum in the system exhausted, apply the brake pedal
and hold it down. Start the engine. If the vacuum
system is operating, the brake pedal will tend
to move downward under constant foot
pressure. If no motion is felt, the vacuum
booster system is not functioning.
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Brake System - General Information
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