Size of oail cooler adapter ports

[Rosey1968]

I am getting ready to replace the oil cooler and lines in my '87 GN with a new cooler and braided AN hose. The current hoses are leaking at multiple joints and at the cooler.

Does anyone know the size of the ports on the oil cooler adapter (see picture)? I just want to make sure I have the correct size fittings before I start the replacement.

Thanks in advance.

 

[Tim Cucci]

1/2" NPT is the size and type that thread directly into the oil adapter. 1/2" pipe.
I just replaced mine with 7/16 ID hose and 8AN fittings. I used a 45 degree fitting on one of the lines at the oil cooler and it leaked. I replaced it with a straight fitting and it's OK. I really am disappointed with the AN aluminum fittings. I am going to change my hoses to a good set made up at the hose shop.

 

[joed]

I know it's old but just for reference Classic Tube sells a set BUO 1062
haven't see them though
View attachment

 

[joed]

Does anyone know the thread for the radiator side of the oil cooler lines? Not using them any longer and want to get some plugs for the holes. I think I saw 3/4-18 somewhere?