thermostat gasket leaking
10-4 On the flow cooler. Just enough extra to overcome the sealer. I know back in the day Moroso used to sell restricters in place of the thermostat. Mostly race applications. You could get different sizes to slow down the flow. Not as restrictive thermostat but enough to maintain temperature. Agreed on the engine compartment clean up ! Once is bad enough !! Swingn’