Hey everyone I've got an issue with my 2000 4.0 OHV ranger with 76,000 miles on it that is otherwise in perfect shape minus a few interior panel creaks . Its got this pinging noise that comes from it mostly while idling.
I originally thought it was the infamous "marbling" problem that 4.0 OHVs had do to push rod tolerances. This all started about 7,500 miles ago so its been through two oil changes since(serviced every 3,000). Recently I have noticed it does it mostly when my truck is in drive at idling or at a near idle(in park it rarely does it). I can hear it in my truck at stoplights and the noise speeds up as i start to accelerate at a slow speed then stops.
I did some investigation today still thinking it was coming from the engine only to find out its coming from underneath in the general back of engine/trani area/under front of cab.
here are some picts:
*Update* here is a video of the noise:
Anyone have any ideas on what it could be? how to fix it?