Engine - Ping Or Buzz Between 1,500 and 2,500 RPM
Pinging or Buzzing Between1,500 and 2,500 RPM
Got a 03-05 MDX or 04-05 TL in your shop that ping 5, 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 it only when the engine is cold.
If you suspect the heat shield is making all the hubbub, try loosening the mounting bolts, pushing the heat shield as far to the left or right as you can (the direction doesn't matter, you just want to anchor the shield against the bolts), then tightening the bolts to 21 lb-ft. Be careful, though, not to overtighten the bolts; if you do, you could strip them. The heat shield is made to move around a little bit even when it's securely bolted in place, but anchoring it against the bolts and tightening them will cut down on the possibility of rattles.
Test-drive the vehicle, and listen for the noise. If you can't hear the noise, you're done. If you can still hear the noise, hook up a STEELMAN(R) ChassisEAR(TM) diagnostic tool (T/N JSP-SM06600) and test-drive the vehicle again to track down the source.
STEELMAN(R) and ChassisEAR(TM) are registered trademarks of J.S. Products, Inc.