Engine - Pinging Or Buzzing Between 1500 and 2500 RPM

SOURCE:
Honda Service News October 2004

TITLE:
Pinging or Buzzing Between 1,500 and 2,500 RPM

APPLIES TO:
2003-04 Accord V6

SERVICE TIP:
Got a 2003-04 Accord V6 in your shop that pings, buzzes, or whistles under load with the engine running at 1,500 to 2,500 rpm? The culprit could be the intermediate shaft bearing heat shield. This noise can change with engine temperature and may be intermittent. Sometimes, you can hear this noise only when the engine is cold.



If you suspect the intermediate shaft heat shield is making all the racket, remove it, and test-drive the vehicle. If the noise goes away, then replace the heat shield. If you hear the noise even without the heat shield, then hook up a STEELMAN(R) ChassisEAR(R) diagnostic tool (T/N JSP-SM06600) to pinpoint the source. To keep from damaging the intermediate shaft bearing, don't drive the vehicle without the heat shield for more than a few minutes. STEELMAN(R) and ChassisEAR(R) are registered trademarks of J.S. Products, Inc.