Re: 2003 Mountaineer 4.6 V8 timming chain noise.
If it sounds like a 'tick' sound, it's probably valve related. If it's more of a hum, or whirring sound then it might be your idler pulley, PS pump pulley or A/C pulley. The idler is generally the first to go. Once way to check power steering noise is to crank the wheel hard over. The PS pump makes a bit more noise when you crank the wheel over to lock. If the noise is a high pitched whine then the pump may be your culprit.
Depending on the mileage, the timing chain should easily last 200K+ without any maintenance. The timing chain tension guide, inside the timing chain cover may be misaligned.
'11 Ram Quad Cab 4x4 SXT 5.7L HEMI (stock); 48,500m
'06 Pontiac G6 GT 3.5L 220hp; 64,000m
'12 Chrysler 200 Limited 3.6L 283hp; 28,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!