Hi - hoping to get some guidance on a squealing noise when starting our 2011 Elantra Limited. It has the 1.8 Nu motor.
I've seen a lot of discussion about similar noises - just lasting a second or two on a cold startup, or after sitting a half hour or so. Most posts point to an issue with the timing chain tensioner bleeding off, and the noise coming from the chain slapping the guides. However, I'm not seeing instances of this being solved by replacing the tensioner. Is this not fixing the issue? Or are people just not following up with a "success" report?
I've recorded some startups - some noisy - some not, to get opinions on what it is - or ideas on how to diagnose it. Here's the video - https://youtu.be/eYm2tiHmTCQ
I had originally thought that this was from the a/c compressor, alternator or something - but that's not the case. Once started and shut off, it will not make the noise again until it sits for quite a while. This kinda supports the tensioner bleeding off theory.
So - anyone else have (or had) similar noises? Any fix or diagnosis suggestions?