Oil Cooler Question
 

I have a large thermostatically oil cooler with no instructions and the in/out aren't marked. Is the side where the thermostat is located the inlet or outlet? Thanks

Like this?

Hate when that happens. All else fails look over and think what makes sense. I ran into that before and you'd think labeling would be crucial on these or any oil state for that matter. Most new after market are.

perfect, thank you