I am also Curious, and a Mechanic, Infact I also worked at one time for this same dealership, I have only been able to talk with the service writer and he has been
lest than forth coming as to what they have done. or what the exact part is that they found leaking, I guess I will find out when I get it back.
When working for Mistsubishi I was issued a Montero fix that was also new and had been to three dealers to repair. I was blown away when I found out what was wrong with it. I found that the cam seal was leaking under the timing cover which was not unusual so I went about my bussiness to replace it but something told me to look at it carefully so I did. Once I got it apart and made sure all the timing marks were lined up
I pulled out the old seal and found nothing wrong with it so I broke out my mirror and flash light and checked out the sealing area around the cam and I found a one in a million air bubble that was in the casting right at the sealing portion of the cam.
no one believed me until I pulled the cam. three different dealers and none of them found the leak in fact none of them had ever pulled the timing cover.
I hope my repair is less eventful. Wish me luck.