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Home >> Mazda >> 2006 >> 6 s, 4D Wagon, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Symptom Troubleshooting [Engine Control System L3 With TC)) >> No. 16 High Oil Consumption/Leakage >> Diagnostic procedure

Diagnostic procedure

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DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 Remove and shake the PCV valve.
Does the PCV valve rattle?
Yes Go to the next step.
No Replace the PCV valve.
2 Verify the following:
  • Proper dipstick
  • Proper engine viscosity
  • Engine oil level

Are all items normal?
Yes Go to the next step.
No Service if necessary.
Repeat Step 2.
3 Inspect the oil leakage from outside of the engine.
Is there any oil leakage found?
Yes Repair or replace oil leakage part.
No Go to the next step.
4 Remove the parts to necessary to inspect turbocharger without remove the turbocharger. Visually inspect for the oil leakage inside turbocharger compressor and turbine housing. Is any engine oil found inside turbocharger compressor or turbine housing? Yes Excessive amount of oil is found:
Replace the turbocharger.
Small amount of oil is found:
Wipe oil out of vehicle, then go to the next step.
No Go to the next step.
5 Is any engine oil found around oil pipes attached on turbocharger center housing? Yes If oil leaks from damaged pipe, replace oil pipe.
Install the removed parts at Step 4.
No Inspect internal engine parts such as valves, valve guides, valve stem seals, cylinder head drain passage, and piston rings.
Then install the removed parts at Step 4.
6 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.