O-320-D2A Port Identification

[514S]

Is anyone familiar with the Lycoming O-320-D2A engine? I am have trouble figuring out what ports are for what. I numbered them 1,2,3,4,5. 1 and 2 are my main issue. Port 1 I installed the straight fitting where from the factor was a plug. My thought is that port 1 and 2 are for the line to the oil cooler. If correct I should be able to put the factory plug back in.

I believe the other three are as follows;
Port 3 is overflow
Port 4 is for tach
Port 5 is for oil temp

Any help appreciated.

[FlyingArcher]

Port1 = Oil Cooler "From"
Port2 = Oil Cooler "To"
Port3 = Oil Breather

[The Green Baron]

check out Brian Meyette's website. Lots of good engine info and great pics.

http://www.meyette.us/SuperiorTextPics.htm