2008 Acura TL Power Steering Moans or Whines During Cold Start-Up.pdf

2008 Acura TL Power Steering Moans or Whines During Cold Start-Up

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SYMPTOM A moan or whine is heard when turning the steering wheel when the engine is cold. There may be air bubbles or foam in the power steering reservoir. The noise usually goes away when the engine warms up. PROBABLE CAUSE Air is entering the power steering pump through the inlet joint O-ring. This causes bubbles to form in the power steering fluid, leading to reduced pump performance. CORRECTIVE ACTION Replace the O-ring on the power steering pump inlet joint. REPAIR PROCEDURE NOTE: Some vehicles affected by Service Bulletin 08-016, Safety Recall: 2004-08 TL Power Steering Feed Hose Leak, were not correctly repaired in that the power steering inlet joint O-ring was not replaced. Before you replace the inlet joint O-ring in this procedure, check its color: • If the O-ring is not colored orange, it was not previously replaced, and this repair will correct the power steering noise at cold start-up.

• If the O-ring is orange, it was already replaced under S/B 08-016. Continue with normal troubleshooting to find the cause of the noise. 1. Remove the right side engine compartment cover (7 clips and 1 bolt). 2. Remove the bolt holding the inlet joint to the power steering pump housing. INLET JOINT BOLT 3. Place a shop towel under the pump inlet joint. 4. Twist the inlet joint back and forth until it is loose, then carefully disconnect the joint, and point the hose upward to minimize fluid loss. 5. Remove the inlet joint O-ring. 6. Apply power steering fluid to the new orange O-ring, and install the O-ring on the inlet joint. 7. Install the inlet joint, and torque its bolt to 11 N.m (8 lb-ft). 8. Top off the power steering fluid, if needed. Start the engine, and let it idle. Make sure that the noise is gone (during a cold start-up) and that the system is operating properly. 9. Reinstall the right side engine compartment cover.