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1986 2,3 diesel thermostat won't open


jsthorne

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Jul 23, 2013
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Vehicle Year
1999
Make / Model
ford ranger
Engine Size
3,0L
Transmission
Manual
hi my engine over heats, i noticed that the thermostat housing was very hot and the little sandwich plate between the hose and the thermostat was cold not even warm just like the bottom hose. i changed thermostat for a 190 f like my parts guy told me went there... same thing, i tried a 180f didnt change anything, any ideas why it wont open or how to bleed the coolant on those diesel engines ?
 


ddb maine

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Have you thought about checking your pump... Sounds like the water pump is dead.
 

87 XLT

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Dec 15, 2008
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Vehicle Year
1987
Make / Model
Ford
Engine Size
2.3L
Transmission
Manual
Sounds like its water pump time!
 

racer2868

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Nov 9, 2013
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Vehicle Year
1986
Make / Model
ford
Engine Size
2.3 diesel
Transmission
Manual
i had the same problems, Small Block Chevy hi-flow stat fixed mine. i bought a 160 and it will not even heat up much. i would buy a 180-200.
 

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