i have a 2003 f150, 4.6 liter, 2 wheel drive. ive recently noticed that sometimes when i start my truck up there is a ticking coming from the engine. but after i drive around a bit the noise seems to go away, and it doesnt happen everytime i start my truck either. any ideas as to what this may be?

 

Valve or exhaust manifold

 

valve deff i have that problem and im going to rip that s*it apart

 

Usually its the manifold. My 99 did that. I installed some headers...clicking went away.

 

thanks for the help. one more question.....should i be concerned about this or is it ok to let it go for now?