If it was replaced with a Ford engine there will be a tag at the drivers side lower engine block that gives the date and facility. Also they put a sticker on the valve cover that says something like Quality Recycled or something like that.
If Ford did the work it will be on the OASIS system yes.
If it was not a Ford engine then its a little more tricky. If Ford did not do the replacement then it wouldn't be on thier system.
I don't know if they have casting numbers that tell you specifically when the engine was produced. I never had the need to figure that out. I suppose there is somewhere on the engine.
Do you suspect you have a new engine?
AJRagno if you want an engine let me know, I'll sell you a brand new rebuilt one. I'll even do a lifetime warranty if you'd like.
The reason i ask is 1st,its a 97 and ive heard alot of horror stories about this motor.I did have an oasis done about a month ago and Ford said the previous owner followed up on 6 recalls including the infamous timing cover leak.2nd,it runs too darn good to even tie it to the bad 97 batch Anyway,i hope to keep it for awhile,and was just curious to know if there are tell tale signs of a motor change.I did look on the valve cover and it has lots of numbers and says WINDSOR??????
This engine isn't going to run badly because its a 97. Heck they make pretty good power. The problems they had has nothing to do with the power they make. If the recall was done then you have one less thing to worry about and I doubt it was ever changed if the recall was performed.
You can count on your engine blowing a head gasket! HOpfully you bought the extended warrenty. If not and its the original engine, you have a ticking time bomb on your hands. Mine was a good engine until 77400.