Gear train

[Magard]

I have a noise in the front of my engine. It’s been there for close to 30000 miles. It’s maybe a little worse. So I decided to try and do some preliminary looking around. I took the plug out where you bar the engine over in front of compressor. I have alittle backlash in the compressor drive gear. On quickserve it looks like the spring loaded gear should be taking out this slack. The noise is kinda tiny sounding. I’m wondering if I’m hearing springs making noise in this gear train. I have cut apart my oil filter last two oil changes and haven’t seen any at all. Just wondering how serious is it if the springs in gear train are loose and how common is this. Also the idler gear was put back in at .010 and the book called of .004. I’ve been told that was fine because old book said .010. I don’t want to chase something that doesn’t really matter but I also don’t want to wreak a 30k engine.