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I've got a sound that started over a year ago from inside the dash.(truck was still completely stock and 115k) At first I thought it was just something in the door pocket or glove box rattling.. it also was so faint i thought I might be hearing things...and I would only hear it at around 2000 rpms if I pressed the pedal (some days I wouldnt hear it though and then it'd come back confirming I hadnt been hearing things)It eventually got louder and louder til now it actually is really annoying but still its worse sometimes and sometimes I swear its gone(i thought it was gone all winter but it came back as it started warming up out)I've checked and fixed a leak from my turbo/downpipe connection but that didnt fix it.I'm highly doubting it to be the exhaust manifold and can't feel any exhaust escaping.The best idea I can come up with is my edge is effed and its being finicky with the timing... would that make any sense even though i did hear a slight noise barely before i had the edge it may not have been the same noise cuz it can be pretty loud now?I have some injectors on the way so i'm going to do a valve adjustment when i do the swap to see if that or the injectors help.. Not gaining oilSo if anyone could give me any input on this issue I'd appreciate it... anything I should look for on the valves while there?Oh yea, and it only does it under load.. not idling or free revvingfor awhile i thought maybe carbon build up?I've spent the last year searching the web now and then and have found many things that sounded similar but nothing quite the same..when it first started getting louder itd only be between 1500-2000 rpms... its not near as noticeable after 2000 rpms

Lately I've started to notice what sounds like a slight tapping after my engine gets up to normal temperature. It's a very light tap & hard to hear but you can definitely hear it when you listen closely....Sometimes it even sounds like a clock ticking fast when driving normally.....Only thing I know that I have changed the last month or so is that I've been running Stanadyne Performance formula in my diesel....Is this an exhaust valve or something that I'm hearing?

Ok - so had tranny TC + VB replaced.Just had the evap/heater core replaced.Picked up the truck and I hear a funny sound - hard to describe - like a very low/dull whir/thud that "appears" to match engine rpm - making me think drivelineInitial thought was TC bolts - so I looked at them and they seemed tight with no play.If I had to say as a "guess" it sounds more like its coming from the block itself. Hard to say. Its very low compared to fan/engine and like a low whirring/thud sound as engine shaft spins.Could it be valves or something - I know we tightened my valves a few months back and no issues and not much play to begin with ?? Any other thoughts ??No codes ........ I have noticed a little black smoke out of the back taking off the line Could the higher tranny pressure in the new VB cause that near the tranny filter besides the block ? :shrug:I know its hard one to diagnose without codes or isolating the exact point.I just changed oil and filter - no differenceCoolant a little low - will top off today.Was thinking cleaning battery terminals as well as well as any sensors ? I have already done the MAP sensor.Throw them out there - keep in mind the new VB which is when this started to happen (or pretty close).John