Couple Oil Filter Housing "?s"

[b-morr]

1st I have this oil filter housing, I believe its a 1990 one. I have an external oil cooler and lines, but need fittings for the housing. Does anyone know the sizes of the threads? I want to say 18mm x1.5 but I have no idea if that's right.

2nd Can anyone tell me which way the oil flows, which port is the inlet and which is the outlet?? (Picture Below) I want to insulate the line going back to the housing and position the cooler so the cooler oil flows down.

3rd I tried searching for this but all I found is people saying you should do it, but nothing else. I have no BS, and people are saying that the relief valve on the housing should be ported. Where is it at, and is it easy to do??

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[b-morr]

Well I went ahead and bought some 18mm x1.5 to an ports, I hope its the right size. But I would really like to know which is the inlet and outlet, and what to do about this relief valve..

 

[knochgoon24]

... and what to do about this relief valve.

Something like this?
http://www.dsmtuners.com/forums/articles-engine-fuel/319342-oil-pressure-relief-valve-porting.html

 

[viprez586]

1 - Believe it's 16mm X1.5

2 - Viewed from installed angle. Right port to top, Left port to bottom of oil cooler.

3 - PORT IT!! Save yourself a headache down the road.

All of your answers in this thread below.
http://www.dsmtuners.com/forums/articles-engine-fuel/271069-2g-external-oil-cooler-install.html

 

[b-morr]

Well I had a 16mm x 1.5 and it was too small, so I bought a 18mm x 1.5 and it was too big. So I'm going to have to try External Oil Cooler Filter Mount even though its a little on the expensive side..

 

[viprez586]

You already have that, the threads on your OFH are just different, why not just take it with you to match up some fittings and save yourself some money.