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Originally Posted by gn1220
What do you mean by over heating? Is it boiling over or does it show hot on the gauge? I ask because if you are going by the gauge it could be a bad sending unit. The second fan only comes on when the a/c is turned on. Go to Impala SS Forum.com and do a search. There you will find answers to any question you will ever have regarding your RM
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I let it run for about 1/2 hour. With the cap off the rad fill tank, it just keeps getting hotter and hotter until it just starts boiling out the fill tank. I even tried to vent any air at the vent screw on the tstat housing. Temp gauge rises with water temp and will get about one mark from the red. At that point I shut her down. The second larger fan motor on the drivers side will never comes on. With the A/C or Heat on max it does not matter. To see if the larger fan worked, I put 12 volts to it directly from the battery and it did run. As the vehicle was running I jumped the larger fan with 12 volts. Now with both fans running the vehicle still overheated in about the same amount of time.
So as before I still have two problems with this vehicle. One, overheating and two, the larger rad fan does not come on.
Thanks guys
GT