Cooling fir 1330 engines

[pauly1]

I noticed that as we rode our F3-S Spyders that one would start the radiator fans much earlier than the other. Filed the info but didn't dig into it as the temperature was always at the same 4-bar level. Fast forward. ..

While adding lights in the cavity behind the grill of the one that was earlier to start the fan, I noticed the inside of the radiator had a build up of debris outside of the fan area. The normal driving airflow comes through the grill and out through the radiators. When at idle, the fans pull and reverse the airflow. Apparently that's enough to keep the center of the radiator cleaned. SpyderDeb had complained of the F3 being hotter than her ST to ride.

To the point: as the outside of the radiators have always been clean, even when power washing, I've not washed them. The junk was easiy removed with a vacuum (as it was in my shop I didn't use compressed air to blow them out). It doesn't take much to slow down or choke off the airflow. Over 1/3 of the area had reduced flow. If your 1330-equipped Spyder seems to have the fans running more often than they used to, check the radiators from the inside!

Happy trails,
Wayne