What year truck do you have?Is it normal for the access cover to leak engine oil? Mine is doing the same, I still have the cover but it is bulged out and I got a new one from Toyota for less than $6.
I have a '94, 1FZ-FE. Valve cover, spark plug tube seals, Distributor O ring were recently done (along with a boat load of other repairs- just got it). Just mentioning the oil seals that were leaking when bought last month. I have thoroughly cleaned the motor- no other oil leaks present- just at the flex plate cover