G'Day slowy,
I've read the
oil should leave the engine to the filter then the cooler then back to the engine. In the event of some mechanical failure the schrapnel and minute metal particles would be caught by the filter before the cooler ( where **** might collect and be released later in the new engine ) The
oil temp sender should be in the sump near the
oil pump pick-up. That's the real engine oil temp.
Smithy.