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I have a low grade rattle vibration coming from the engine compartment on a 2009 Hyundai sonata 65k for mileage. Obviously driving me nuts. Idler pulley replaced. Not it. Front and right front engine mounts are good. The noise is way more detectable when the vehicle is in drive or reverse just idling or revving. Local shops are stumped. It goes away when in neutral or park. Can,t hear it very well when driving. Could be due to cabin noise. Any suggestion? All is appreciated.
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I just watched a video by Eric replaced the pulley not the entire compressor. Once I narrow it down I will post. Got to be a bearing just starting to go.
Was messing around with it today and noise seems to get louder when ac is running. I’m going to get two sets of eyes on it later in the week just to be 100 percent sure. On newer cars it appears they won’t just sell you the clutch and pulley so if it is the compressor looks like I will be swapping the whole thing out. Anyone tell me how difficult this will be.
You should still do the drive belt removal test.
You can get a clutch on Ebay .. look at item #221238323028
Ok. Belt came off today. The results were mixed. The ps pulley had a little bit of play but may be normal. No noises. The ac pulley a little bit more play but not much more. No noises. The others felt fine. The new idler pulley the dealer put on felt like glass. The other one felt gravely and made a little noise when turning. Could it be this pulley. Weird thing is: the noise is more noticeable in gear and absent out of gear. Would this make sense? I guess my plan is to replace other idler pulley. The clutch on eBay was for a v6. I did find an entire used compressor for 50.00. I think replacing other pulley 1st is the way to go then if that is not it go to the ac pulley. Oh by the way. No belt and the noise went away with engine on: both in and out of gear. Any other suggestions?
Top idler pulley replaced. Should the bearings rattle a little in these when you shake them. Mine does a bit. Can’t tell if noise is still there in the car as we have high winds. It sounds like it may still be there. Tomorrow will tell for sure.
Bearing would only rattle if it was worn enough to have free play. The one you mentioned feeling glass smooth is how they should all feel. A gravely feeling or rattle shows its time for a new one.
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