Some customers may experience a ticking or tapping-type noise from the engine area at 2000-2500 rpm during acceleration that is most noticeable after a cold soak. New exhaust manifolds have been developed to minimize this condition

Im experiencing this with my '04 2.7L engine. It goes away about a minute after startup when sitting in the cold weather. It sounds like the timing chain death rattle/valve pinging noise. I have a "Toyota certified" used truck with 10k till the extended warranty runs out. Should I have this looked at or is it normal? It doesnt happen when kept in a fairly warm garage overnight so Im assuming its a thickened oil condition. Im running 5W-30 as specified.

'04 Taco x-cab 3RZ FE stock (daily driver)
'90 x-cab 22RE stock
'82 Hilux 6" lift (ACES HI)
'82 2-Hiluxs' Rally Edition (parts)
'81 Hilux 3" lift (parts/restore)