Nissan Sunny 2004 turns off on the road

Sep 17, 2009

- Hi there, me again. Ned. Are there two fans on the radiator? If so, the left fan is usually the engine cooling fan. The right fan is the air conditioning fan. This fan comes on when you turn on the air conditioner. The engine fan comes on automsatically at a predetermined engine temp. Both fans are separate from each other and will run at different times. The A/C fan stays on as long as the a/c is on to cool the condensor of the a/c.because it cannot fluctuate in temp and pressure without affecting the cooling effect. The only other fan is inside the car under the dashboard, It blow rhe air over the a/c evaporator to remove the heat and produce the cold air that comes out of the vents. Is this more what you were asking about the fans? I hope this was what you needed to know. Thank you and happy motoring -Ned-

Sep 17, 2009

- The fans are technicaly ineffective at speeds above 35 miles per hour, due to the ram air affect of speed Does the car overheat at high speed, low speed or both? When does it start? right away or after driving awhile? - Ned- This next part is very important. Are all the deflectors and fan shtroud in place? What pressure radiator cap is on this vehicle? For every pound of pressure the boiling point of water is raised 2 degrees. Limit on a passenger vehicle is 15# cap.Anti freeze is a good coolant, yet, too strong a mixture can retain heat instead of relesing it to the radiator. The coolant mix should be around 60/40, 40% being the water.Feel free to contact me if you have anymore quesrions. Good Luck.

Sep 17, 2009

- The fans are technicaly ineffective at speeds above 35 miles per hour, due to the ram air affect of speed Does the car overheat at high speed, low speed or both? When does it start? right away or after driving awhile? - Ned- This next part is very important. Are all the deflectors and fan shtroud in place? What pressure radiator cap is on this vehicle? For every pound of pressure the boiling point of water is raised 2 degrees. Limit on a passenger vehicle is 15# cap.Anti freeze is a good coolant, yet, too strong a mixture can retain heat instead of relesing it to the radiator. The coolant mix should be around 60/40, 40% being the water.Feel free to contact me if you have anymore quesrions. Good Luck.