Are both radiator fans suppose to come on together?
1995 lumina sedan 3800 engine radiator fans don't work together. The driver side fan comes on with the air conditioning,but the passenger side fan doesn't seem to come on at all. Car runs a little hot but doesn't overheat.Any suggestions.
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Re: Are both radiator fans suppose to come on together?
I found this forum site and from what I can discern, both fans should be running once engine temperature sensor turns them on. Can you switch wiring from 1 fan to the other? This would let you know whether you have a faulty motor or relay. Maybe you can pick up some tips too.
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the shroud should be screwed into the back side of the radiator (side closest to the engine) you will want to test fit it with the screw holes lined up and have someone spin the fan to see if the shroud is out of the way. It's normal not to have it screwed in at the bottom.
Both fans don't necessarily have to start and stop together but you do need both of them to adequately cool the engine. If you plugged the harness from the drivers side fan into the passenger side fan and it worked then I think you've ruled out any electrical problems with the wiring. It's probably 1 of 2 things. Either the fan has gone out, or the temperature sensor has gone bad. I would start with the temperature sensor first. They are inexpensive and easy to replace. The sensor just threads into the radiator, usually at the bottom.
the electric cooling fan for the radiator will not turn on when the engine reaches normal operating temp, its only supposed to come on if the engine temp goes over the normal temp. (around 220 degrees) it is normal for the fan to come on any time the a/c or defroster is turned on.
no fan comes on when engine cold start up .but it will come on when you turn on air conditioning or defrost on .if engine idling a while when temp get 190 degree the fan will kick on.if over heating you got air in system .wait until cools check coolant add more .crank engine let it idle few. minutes when start warming up turn off engine wait a while before removing radiator cap so you wont get scald.add more coolant .crank it again starting warming up turn off engine wait a while .add coolant .keep doing this procedure until your coolant stop dropping off .if you do this more than 6 times you got a leak some where.check crank level for signs.if oil level higher than normal.if everything looking good.when engine cool make sure add coolant to over flow jug cold level mark.
Drain the system. Remove the upper radiator cover and the dual cooling fans (4 bolts and an electrical connector). Disconnect the transmission cooler lines and the upper and lower hoses.. The radiator should freely pull straight up and out. Reverse the process to install the new radiator.