Let me first say that TW is the best.. Anyway, I have a 2006 4.0LV6 dc/sb Sport PreRunner. I recently crossed the 125K mile mark, and I just finished up with a bunch of maintenance. Recently I've noticed a cranking/rattling noise coming from the engine when I'm idling and sometimes when I'm accelerating. It doesn't seem to be coming from the belt or the fan. I think it's coming from the motor located below the engine oil filter. Do you guys have any idea what this might be? I took the truck in to a couple places, but they all want to charge me like 100$ for a full engine diagnostic test. None of the mechanics were willing to just take a quick look at my engine and offer some advice or an estimate. Any advice would be absolutely awesome!
(I attached some pictures to give you guys an idea of what I'm talking about)
Oh, and also, this is definitely not the "Taco Tick"
EDIT: Added Recording