1986 2,3 diesel thermostat won't open

[jsthorne]

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]

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

 

[87 XLT]

Sounds like its water pump time!

 

[racer2868]

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.