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temperture rising

378 views 4 replies 4 participants last post by  hikonhui 
#1 ·
i have a 85 4runner; was wondering if this happened to anyone else. Not much help in FSM. when i slide the temperture lever over from cold to hot, without turning the fan on the temperture gauge, it rockets to unsafe red zone. :( what can i do to fix that. thank u in advance.
 
#2 ·
a new thermastat is 6-20 buck bepending the dual valve one are like 20
it would be an easy first step

ur thermastat can slowly go out
so when u open the flow to the heater core and the fan is not dispercing the heat ur not cooling

i could be wrong but it is only a 6 dollar mantance expence that it wouldn't hurn anyway

so good luck let me know ur results
 
#3 ·
mine does that too, however my t-stat was just replaced by the dealership not two months ago, when i get the time i'm going to pull it and change it to the dual valve one or drill a hole in the one i have per roger brown's website
 
#4 ·
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