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Had a recommendation to replace the purge valve. That didn’t help. Such a weird issue. No error codes. All rockers and lash adjusters replaced. Still ticking. I cannot find an exhaust leak. The weird thing is I have been watching oil pressure. When the engine comes to idle on startup as the pressure and rpm comes down the tick starts.  Oil pressure between 30-40 psi it will tick. After you drive it and get it all warmed up the oil pressure drops to 27-28 psi. No tick. I am so confused.  Next stop light the oil pressure may be 30 psi and you hear the tick. I would like to think if it was a cylinder head issue or a major mechanical issue with the engine the tick would always be there???