Possible explanations:
ABS diagnostic self-test:
When you first start up your car, and put it into gear, you will hear a "clunk" sound as you start to move. This is normal and part of the ABS system. All RX-8's will do this.
Lug nuts:
Make sure your lug nuts are torqued to 108 ft-lb (Old torque specs used to be 65 - 87 ft/lbs) as per the updated TSB.. Failure to torque them properly can lead to the car making a clicking sound when turning or driving.
Here's the TSB:
Quote:
APPLICABLE MODEL(S) / VINS
2004 RX-8 - VIN Range - JM1FE17**40100000 - 40128212
DESCRIPTION
A snapping noise may be heard from the front suspension when the vehicle is turning at low speeds, such as in a parking lot or into a driveway. The noise is more likely to occur when the desired turning circle of the vehicle is
larger (wider turn).
The number of times this noise may occur is in direct proportion to the revolution of tires. If the vehicle is turning quickly, the snapping noise may be heard constantly. When the vehicle is making a right turn, the noise is heard from the left of vehicle, and when the vehicle is making a left turn, the noise is heard from the right of vehicle.
When the vehicle is making a turn with the front tires receiving side force, the joint surface of the aluminum wheel slightly deforms, allowing the wheel and brake disc to slip against each other. This slippage causes the anti-corrosion treatment to peel off the brake disc. The frictional co-efficient between the wheel and brake disc joint surface changes. As a result, a stick-slip noise occurs
They also clean the mounting surface of brake disc and wheel with brake cleaner.
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Turbocharged RX-8
