Internal Noise? Never heard this before.
Car is a 96 Trans Am. I doubt that matters for this though.
If one cyl makes more noise than others, that would be the one to focus on.
sudden oil consumption could mean you broke a spring and it compromised the valve stem seal or you bent the valve
popping the valve covers would visually show that immediately
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http://shbox.com/1/4th_gen_tech2.html#adjust_valves
I'd also check the plugs to make sure they're all tight. If they're loose they can produce a tap noise.







