No.22 Vibration Concerns (Engine)[L3 With Tc] - Mazda CX-7 2007 Workshop Manual

2007 mazda cx-7
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SYMPTOM TROUBLESHOOTING [L3 WITH TC]
STEP
INSPECTION
5
Is hiss sound present?
6
Is rap or roar sound present?
7
Is knocking noise present?
8
Inspect the intake and exhaust housing system
for loose installation.
Is there any problem found?
9
Remove the parts necessary to inspect
turbocharger without removing the turbocharger.
Inspect if turbocharger compressor wheel is
bent, damaged, or interfering with housing on
vehicle.
Is there any problem?
10
Inspect the turbocharger compressor wheel
locknut is loose or has fallen down inside
turbocharger.
Is there any problem?
11
Turn the turbocharger compressor wheel by
hand.
Does the wheel turn easily and smoothly?
12
Visually inspect the turbine housing.
Is there any carbon built-up or foreign material
on turbine housing?
13
Verify test results.
• If normal, return to the diagnostic index to service any additional symptoms.
• If a malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform the
repair or diagnosis.
— If the vehicle is repaired, troubleshooting is completed.
— If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if a later
calibration is available. Retest.
End Of Sie

NO.22 VIBRATION CONCERNS (ENGINE)[L3 WITH TC]

22
VIBRATION CONCERNS (ENGINE)
• Vibration from under the hood or driveline
DESCRIPTION
• Loose attaching bolts or worn parts
POSSIBLE CAUSE
• Components malfunction such as worn parts
Diagnostic procedure
STEP
INSPECTION
1
Inspect the following components for loose
attaching bolts or worn parts:
• Cooling fan
• Condenser fan
• Drive belt and pulley
• Engine mounts
• Exhaust system
Are all items normal?
RESULTS
Yes
Inspect and repair the following;
• Vacuum leakage
• Spark plug looseness
• Intake-air system leakage
No
Go to the next step.
Yes
Inspect the exhaust system or loose parts.
No
Go to the next step.
Yes
Go to symptom troubleshooting "NO.13 KNOCKING/
PINGING".
(See01-03-50 NO.13 KNOCKING/PINGING[L3 WITH
TC].)
No
If noise comes from engine internal, inspect for the
friction gear, timing chain or MLA noise.
Yes
Repair installation or replace suspected part.
No
Go to the next step.
Yes
Replace the turbocharger.
No
Go to the next step.
Yes
Replace the turbocharger.
No
Go to the next step.
Yes
Go to the next step.
No
Replace the turbocharger.
Yes
Clean built-up carbon or remove foreign materials.
If turbine housing damaged, replace the turbocharger.
No
Install the removal parts at Step 9, and inspect all
turbocharger related parts installed correctly.
RESULTS
Yes
Inspect the following systems:
• Wheels
• Transmission and mounts
• Driveline
• Suspension
Service if necessary.
No
Readjust or retighten suspect parts installation
position.
Service if necessary for other parts.
ACTION
id010339802800
ACTION
01-03–67
01-03

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