2004 ford ranger ext cab

2004 xl super cab pickup 2 wd 3.0L ohv 12 v, as ac, s, eat, m/fm cd, ngine has a NOISE, ot sure what it is, got this truck to pull behind my rv drove it from the dealer home and the engine started making Noise, ike a ticking sound, ruck runs and drives ok, o smoke no rust, as bed liner, as small crack in front window