check for the inspection cover not being hooked into the oil pan lip correctly, and the flexplate hitting it.

i made that mistake. scared the **** out of me.

do you have a helper to start the engine, or turn the starter while you get under it?
if not, remove the spark plugs and turn the engine with a socket on the big crank bolt. 1-1/4 in.

 

yes i have oil pressure. I have to drop the pan again. FML

 

see my edit above.

what does FML mean?

 

+1 Check this first.

 

I bet it is the inspection plate. I had dinted mine in when I changed the pump. Rattled something fierce. I thought my truck was gonna explode

 

Also if everything checks out check your crank pulley the balancer might have broke off the back and it bouncing around the pully/shaft. It has happened on my truck. Would just be a coincidence since you just had the pan off but is another suggestion while your under there.

 

F*** my life....haha

 

we have a saying of exclamation around here - well, f*** me running
the response by someone standing neaby is - take off.

 

OK the pickup tube wasn't in its notch in the oil pan. was getting nicked.

 

Thanks for keeping us informed...