My NA YB has a weird whirring noise at the front. Sounds like its near the aux shaft.
Rebuilt very recently and I thought the cam bearings were the cause so I changed them. Noise is still there. It's only there when the engine is idling, twiddle the throttle and it goes away, creeps back in as engine revs die down. Can anyone suggest what it may be??
Cheers

 

belt to tight.

 

thats what I thought initially so its set to be turnable 90 degrees...

 

After all the dicking about I've stripped the threads outta the head for the belt tensioner. Shite. Helicoil time.

 

make sure you drill it straight.