Overheating on the highway. 76, 2.0 Options

[SVG223]

My 914 overheats on the highway. I had concerns about the air flap, but I think the thermostat has broken and it stays in the open position. I thought something might be clogging the fan but it looks clear. I wonder about the heater air hose that goes over the motor. It could be blocking some air possibly. I may try to tie it out of the way. After exiting the highway and stopping at a stopsign the idle was extremely low, I was surprised it was still running. I turned the engine off for a while and it ran better after it cooled down. Any ideas would be appreciated.

[piscean914]

i would start by confirming the oil temp in the sump with a mainly by design style oil temp dip sticks for 914-4's - mainly by design was purchased by ron at precision matters - i only see 356 oil temp dip sticks on his site - there are also gene berg type iv oil dip stick sensors as well - i would start systematically with the accuracy of the oil temp gauge before chasing other issues - i have a thermostatically controlled external oil cooler, custom mount, w/fan, after years of experimenting with verified oil temps - hope this helps

http://www.914world.com/bbs2/index.php?showtopic=334157