TAPPING NOISE FROM ENGINE AT
IDLE
Applicable Models
| Model |
Starting S/N |
Ending S/N |
Model Spec |
| MAZDA3 2004-2005 |
000000 |
ZZZZZZ |
|
Related
Category/Subcategory/Symptoms
ENGINE / MECHANICAL / PINGING
ENGINE / MECHANICAL / UNUSUAL NOISE(EXCL.
PINGING,SQUEAKING,OPERATION,RESONANCE)
ENGINE / FUEL / EXCESSIVE OPERATION NOISE
ENGINE / FUEL / RESONANCE NOISE
ENGINE / FUEL / UNUSUAL NOISE(EXCL.
PINGING,SQUEAKING,OPERATION,RESONANCE)
MTOL - 4556 Dealer Repair
Information
Symptom and Conditions
A tapping/clatter type noise might be heard from engine at
operating temperature and when warm. The noise may come from the
inside of the intake manifold.
To verify, close the Intake Manifold Tuning Valve (IMTV #) PID using
WDS. The workshop manual calls this the variable intake-air shutter
valve actuator. For procedure, see following instructions. If noise
goes away with IMTV # = OFF, replace intake manifold assembly.
1. ID vehicle (Note - select "automatic" if A/T equipped, not ASM.)
2. Select TOOLBOX 3. Select DATALOGGER. Press Tick 4. Select
POWERTRAIN 5. Select ENGINE. Press Tick 6. Select IMTV # PID. Press
Tick 7. At Datalogger screen, select IMTV # 8. Press # button on
right side of screen 9. Press button with icon showing hand. IMTV #
changes to IMTV = 10. Press "-" button. IMTV changes from ON to OFF
11. Verify tapping/clatter noise stops with IMTV = OFF, then comes
back with IMTV = ON, by toggling "+" and "-" buttons. 12. If
verified, replace intake manifold assembly by following procedure
outlined in WSM section 01-13, INTAKE-AIR SYSTEM.
Published in M-tips, May/June 2005 edition.
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