Honda Repair Questions? Ask a Mechanic for Answers ASAP
Do you know roughly around the engine you seem to hear this noise from?
Does the noise change at all when turning the steering back and forth or turning the A/C on?
Normally what is done to rule out anything on the pulley side of the engine..is to remove the belt..the belt that runs the Air conditioning / alternator / idlers / tensioner..switch the engine on..and see if the noise is still there or not..if not then you'll know for sure that one of those pulleys that belt runs is either has worn bearings..so you would need to spin each by hand to get a feel if any are rough when spun etc..that being said if your hearing a definate change when the A/C compressor kicks on..then i maybe suspect that would likely be your problem..maybe the clutch pulley itself..the beltruns over and maybe not so much the compresor itself unless there is clear indication the noise is coming from it....but like i say above certainly check the auxillary components first first like i mentioned above and see what you find...
Have you checked your intake / filter assembly..check the airfilter has been installed correctly.. only other thing id say would need to be checked is the water pump..because its timing belt driven it would vital its ruled out..unless the belt its coming up for renewal..i note you mention the cars got 140,000miles on it,so id imagine it should of had one done at each 90,000miles..
No problem at all..glad to help..hopefully above gives you some direction anyway..but if you should have anything else to add and need advice then just ask...In the mean time if you could leave a rating it would be much appreciated..thank you