engine noise on a 4.7L

Hi ram4x4,

This could be loose connecting rods or a worn bearings/seal causing the crank to be off-center.  These noises never turn out good over time.  I would have it looked at sooner rather than later.  It could cost you a bunch later.

Good luck!

buy a 408 stroker

its probably just lifter noise, the hydrolic lifters seem to devleop noise over time, it is normal, but if it seem like the noise is louder then that then get it looked at, could be colapsed pistons if it goes away once warm

try running 10w30 and add a acdelco product called EOS if the noise is still there its a mechanical problem and will get expensive.  if the noise goes away its called piston slap and it doesn't cause significant damage my GM has 260,000 on it and it slapped from the day i got it.  EOS is about $10 from any GM dealer.