When I park my car after it's warmed up to 200+ degrees, I notice this strange smell for a few minutes until it cools down. It's not a sweet coolant smell or a burnt/smokey oil smell. Not a clutch smell either. It almost smells like permatex that has been heated up. The engine is relatively new. I wasn't "rebuilt" per se. It was "gone over", whatever that means. It`s a 95 Lightning 351W motor. All of the gaskets are still pretty new since it onlt has around 300 miles on it since being put back together. I dont have any leaks, and I'm not seeing any drop in oil or coolant levels. I swear I've smelled this smell before on other cars I've owned. Maybe it's a "heated" oil smell? Car doesnt overheat. My electric fans kick on at around 190-200 or so and drop the engine temp within less than a minute. On a side-note, I'm using a push-pin type sensor in the upper radiator to kick the fans on. I would like to swap that for a sensor that threads into the thermostat housing area. Just not sure how to do that. I have a temperature sender threaded into the upper intake currently, so I don't think I can use that occupied location for a new temp sensor.