Just rebuilt my 305 for the second time........... Engine is running great only has 300 miles on it so I am still breaking it in. I am running a 180 thermostat......... Have the fan running all the time but for some reason the engine seems to wanna creep over 220 in traffic after she has been on the highway for 10 minutes. Just put in a new cooling fan motor. Has anyone had this problem. Is there a stronger turning fan motor out there? Also I have check my cooling fan circuit from the wire and if I ground the wire at the switch she comes on. I have gone through two different cooling fan switch's and neither have turned on the fan. I even went as far as cleaning the head where the switch is crewed in with a wire brush. But no difference.......
Any suggestions

Kenny

 

Try adding "Water Wetter" in to the radiator...Worked good for me last summer when I had a cooling fan problem.

http://www.redlineoil.com/products_coolant.asp

You can find it at any auto store.