3RZ crank seal bad or Oil pump seal

hey guys I looked up under the truck the other day to replace the lower idler pulley that had gone bad, and noticed a slight leak from behind crank pulley never noticing it before I noted it and went ahead and replaced the idler pulley. The next day I went to put skid plate back on and the truck was dripping from behind the crank pulley. Question is would the crank seal leak that severely and go bad that quickly(from just residue to a drip in one day)? Or could It be the oil pump seal causing such a leak? I have the crank seal out at this point just seeing what you all might think before I go further.

Thanks

 

did you ever figure out what this was?

 

it's most likely your crank seal, and not the oil pump.