TSB: 01-043/07

MULTI-MODEL - VARIABLE VALVE TIMING NOISE WHEN STARTING ENGINE

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 started, some vehicles may exhibit a loud ticking noise from the variable valve timing actuator at first start for a couple of seconds. 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. Replace the variable valve timing actuator after the engine cools down. Refer to Workshop Manual section 01-10.

3. Do an engine flush and replace the oil filter with a new one to remove dust and metal particles from the engine.

4. Verify repair.

PART(S) INFORMATION

WARRANTY INFORMATION

NOTE:

• This warranty information applies only to verified customer complaints on vehicles eligible for warranty repair. Refer to the Warranty Wizard for warranty term information.

• Additional diagnostic time cannot be claimed for this repair.