yes. starts with slight chirping on the stbd, then the port follows momentarily. sometimes taking them out of gear and reving up will kill them for a moment. other times not. The gauge alarm lights are not going off, and the only gauge difference I have seen is oil temp at 230 when the port was 180. It happened briefly while water testing with Tyler; he figured low oil pressure alarm, so he removed both thermostats as I was leaving to keep the oil cooler/ thicker