If you're setting them at 6 hot there's no reason for it to be noisy unless maybe you have a lifter that's sticking??? Someone else may have more ideas than I do but I'd pull the pushrod and make sure the lifter moves freely in the bore.
Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.
| 
