Engine - Loud Ticking Noise at Engine Start Up

Discussion in '2007' started by JustROLLIN, Jan 7, 2009.

  1. JustROLLIN

    JustROLLIN Guest

    Bulletin No: 01-002/08

    Last Issued: 01/16/2008

    Subject:
    VARIABLE VALVE TIMING VVT) NOISE WHEN STARTING ENGINE

    BULLETIN NOTE This bulletin supersedes the previous bulletin 01-043/07 issued on 11/29/07. The REPAIR PROCEDURE and PART(S) INFORMATION have been revised.

    APPLICABLE MODEL(S)/VINs
    2007 Mazdaspeed3 vehicles with VINs lower than JM1BK******742222 (produced before April 1, 2007)

    2006-2007 Mazdaspeed6 vehicles with VINs lower than JM1 GG******109660 (produced before April 1, 2007)

    2007 Mazda CX-7 vehicles with VINs lower than JM3ER******166945 (produced before April 1, 2007)

    DESCRIPTION
    When the engine is first started, some vehicles may exhibit a loud ticking noise from the variable valve timing (VVT). This is caused by the lock pin of the variable valve timing actuator not fully engaging. Heat treatment has now been added around the hole of the variable valve timing rotor lock pin to prevent this from happening.

    Customers having this concern should have their vehicle repaired using the following repair procedure.

    REPAIR PROCEDURE

    1. Verify customer concern.

    2. After the engine cools down, replace the variable valve timing actuator. Refer to VARIABLE VALVE TIMING ACTUATOR REMOVAL INSTALLATION [L3 WITH TC] on MS3 or in the Workshop Manual section 01-10.

    Also, you may refer to the Training job aid Engine Timing Verification and Correction LF 2.0L and L3/L3T 2.3L" on MS3.

    3. Change the engine oil (5W-30) only, then start and let the engine idle for 5 minutes. This is to remove contaminants from the engine.

    4. After the engine cools down, change the engine oil (5W-30) and filter.

    5. Verify repair.
     

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