Series 60 whine under the engine

Could it be the Bull Gear in the front cover ? That's part of the timing for the top cam cam valves. The bull gear is a weak part on the S60 setup. Detroit say to replace them at like 800,000 miles. Their is an access cover on front cover of that main front cover, just for check the play in the bull gear. I had mine check at 900,000 miles and it was still good. I drove that engine till 1.4 million never changed the bull gear. If it goes bad the engine will self destruct basically.

 

I did not see any play also. So that good

 

Any updates? Mine has a whine too in cold days.

 

Any update on what it was having similar issue. A whine noise on the right side of the engine

 

Probably the alternator, belt tensioner, a/c clutch bearing. Take belt off, listen. If it’s still making noise, you can try to listen to the bearing on the accessory drive using stethoscope, or check fan bearing by removing the belts, Might get lucky by spraying some wd or pb in behind each bearing and listening for any changes. Sometimes just water will help find an mis aligned or worn belt, or make a noise temporarily disappear. Bull gears will whine. Worse in cold weather. When they’re going bad because of the bearing, you may hear an inconsistent rattle, clank, or clunking noise. Especially if you stand right in front of the grill. If bull gear is suspect, it can be checked by removing the small front cover, or accessory drive, and prying with a bar. Might want to do that for peace of mind if you can’t pinpoint the problem.