Oil in my antifreeze?

[JFP in PA]

You can try reverse flushing (backwards to the normal coolant flow) with the T stat removed, which should help remove a lot of the bits, but it is no guarantee you will get everything out, that requires tearing the engine down.

[1Madmachinist]

Forgive my ignorance but what’s the best procedure for reverse flushing? My initial idea was to machine an aluminum plate to fit in place of the oil cooler that had fittings on the other side to plug a water hose to then remove the water pump and thermostat and wash everything out through those ports but I tend to over think things. Also I’m not completely sure of how the coolant flows through the block.