Tick Tick Tick sound

[stargate160]

Anyone else have a tick tick tick sound while you're driving? I read somewhere that it might be the manifold gaskets or something. It's very annoying and I really want it fixed. When I took my car to Ford, they wanted $90 just to check out the manifold gaskets. So without knowing that's the problem, I don't want to waste almost $100 on nothing. Anyone experience that problem and fixed it? Manifold and gaskets are fairly expensive ($800ish), I hope that's not the cause.

Ford Mustang 2000 V6 90k miles

 

[replicated]

I hear a tick tick sound when I rev the engine. I heard the problem could be due to valve lifters but I don't know.