recall studies years back that showed pistons could be running with temps up to 500-600 degrees, conrods up to 400, crank shafts up to 350. all this heat has to dissipate.
I had a volvo years ago that would run the cabin fan on its own in the summer time once parked. I could never figure out its routine. I'd park the car, everything would be off, walk out later and the fan would come on for 10 minutes and shut down. Someone "confirmed" (internet) for me that this was programming in that model to pull heat off the engine through the heater core. I haven't witness the s60 we have now do it yet.
M
I had a volvo years ago that would run the cabin fan on its own in the summer time once parked. I could never figure out its routine. I'd park the car, everything would be off, walk out later and the fan would come on for 10 minutes and shut down. Someone "confirmed" (internet) for me that this was programming in that model to pull heat off the engine through the heater core. I haven't witness the s60 we have now do it yet.
M