yep you have to fill the cooler up or all the oil in your sump will fill it up and the oil pick up then wont find anything.
people that have thermostatically controlled oil coolers and don't fill them up first might suddenly have the oil light come on. this is because the oil has just got hot enough and has then let all the oil into the cooler.
Tim
Anyone know about after fitting one? How long will it take to get the oil
> presure up again? I'm reckoning on having to crank the engine over until i
> see the oil pressure gauge move. I'll also have a remote filter fitted;
> this will be filled to the brim, but should i try and fill the cooler up as
> well?
>
> Any ideas/recommendations?
>
> Phil
>
>