Which thermostat? - Ranger-Forums - The Ultimate Ford Ranger Resource


4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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  #1  
Old 07-08-2005
Mr Mufakka's Avatar
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Which thermostat?

Mine is needing to be replaced. Should I go with the stock 192 piece or should I step down to the 180 one? This is on a SOHC.
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Old 07-08-2005
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Wouldnt stock be easier to find.........maybe not......... ....lol
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  #3  
Old 07-08-2005
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always stay with 192, fuel injected engines run best at about 210 degrees, so always stick with the stock temp
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Old 07-08-2005
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I switched mine out with a really low 90 degree thermostat. Best to stick with stock or close on the lil v6's.
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  #5  
Old 07-12-2005
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I think i may change mine since the temp gage has been rising the past few days. So stick with the 192/195 one not the 180 one? For $5.50 for the t-stat and gasket it's worth trying this to see if it helps.
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Old 07-12-2005
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ok long story short, dont try it.

engine wont reach operating temps and it causes bad things. if u are down south where its hot all year than maybe. just like up north some switch to a 205 for more heat and quicker? warm ups.
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  #7  
Old 07-12-2005
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On some vehicles if the PCM does not see the engine coolant temperature come up to a specific value quick enough then it can set the check engine light. Just something else to think about and all the more reason to go with a factory temperature thermostat.
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  #8  
Old 07-12-2005
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always use stock on fuel injected vehicles, unless its highly modified and tuned for a lower temp tstat
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Old 07-12-2005
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its pretty hot around here all summer long, could i switch to a lower temp during the summer and switch back at winter?
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  #10  
Old 07-13-2005
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Just re-read my post, i didnt mean it was worth trying the 180 one, i just meant it was worth changing the t-stat to see if that is what it my issue
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  #11  
Old 07-14-2005
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Go with stock temp. the engine performs best at normal operating temperature. if you go lower than normal the injector pulse width will stay long, thus throwing more fuel into the engine to increace combustion temperatures. its bad for o2 sensors and converters and causes excess carbon buildup in the top end, not to mention your performance will suck and fuel mileage will go down.
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