If you are using a remote filter mount, the hose from the block adapter marked "OUT" should be connected to the one marked "IN" on the filter adapter, the one from the filter marked "OUT" goes to the cooler (either side) and the other hose from the cooler goes to the "IN" port at the block adapter. You probably have the hoses at the block reversed, attempting to force
oil backwards through the filter. Easy to do. If you use a drill to spin the pump it must be set to Reverse.