I changed my plugs yesterday with the AC Delco iridium plugs(and found out that rhe previous ones were autolite p605 double plat). Anyway after that the engine got a bit more 'quiet' but I noticed an unusual noise coming from the passenger side of the engine so I shot a video of turning the car on and letting it run for a bit and at the end took the camera to the exhaust.
Im hoping someone with a trained ear can let me know if this is a misfire or nothing because if the wires are bad I'd wanna change em all together with the plugs
Thanks

 

You would be throwing a misfire code.
Sounds like you have a bad bearing somewhere...alternator?

 

Yea,at first i thought,yea,maybe a misfire,but upon exhaust note,i dont think it has one. did it sound like this before you changed the plugs? if no, then you may have cracked the insulation (white part of plug) installing one. Maybe crushed the gap on a plug,or loose plug wire.

If it sounds the same,it does sound a bit like a bad bearing etc on the belt system. Pull the belt off while engine is cold. Start it up,if sounds gone,you have a bad bearing somewhere. Start spinning pulleys. anything that makes any kind of noises like sand in bearings etc. replace. it sound sound smooth. Dont worry if any lights on the dash comes on. they will go off when you put the belt back on.

 

After changing the plugs the engine kinda got more quiet but the noise you are describing is only present at the first few seconds that the car is on for. When I start driving it goes away or atleast its not as intense anymore for me to notice.

I was told by someone else that it might be a bad bearing as well but I haven't checked on it yet. Just curious though how long would it be safe to have the engine run without the belt?

 

The loud noise at start up could be the fan clutch. They do that for a bit at start up (annoying). Wait till dark and start it up and look at the wires. If there`s any arcing, you`ll see it. also check to see if the wires are on all the way.