I found this pic, i have no idea what engine it comes from:
http://img219.imageshack.us/img219/1020/image040tu5.jpg
But that is the same port that was blocked off on my car. I couldnt find a spot on my car where it would lead to sump as in the picture. Does it have to be like this on rev3 or just blocked off from factory? Im worried if my bearings arent wearing out..
here is a quote from MR2 knowledgebase about Altezza:
Oil drain from the head
The Altezza engine runs an oil drain down from the head, that the FWD engine doesnt have.
The FWD engine has something similar, but it's at the top of the rocker cover; the RWD one is down
lower.
The FWD engine obviously uses gravity to drain the oil back out of the head, as it's on a lean.
If you wish to use a FWD engine in a RWD setup, this is potentially important. You could get oil drain
back issues, where the head fills up with oil, and the oil pickup sucks dry, which usually results in
your bearings giving up.
If you use the Altezza rear water outlet, (Which has the oil drain integrated) and tap a hole into the
FWD head to suit, you can run this oil return to the sump.
The FWD engine has a big pipe running from the rear of the rocker cover back down to the sump, it
leads to the same place in the sump as the RWD one.
You'd want to block this off, if you're using the RWD oil drainback.