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Thermo stat problem

Discussion in '1982-Present GM Diesel' started by odee1, Oct 30, 2004.

  1. odee1

    odee1 Registered Member

    Feb 27, 2004
    Likes Received:
    Noticed a slight coolant leak out of my sub today after a short run. Had a small drip coming out of top radiator hose at the radiator, checked it out top hose was super hard with engine off. Could this be a sticking thremo stat or what? Last couple of days it is like it would get about half way on the needle movement then open up to rest a bit under the half mark.
  2. bigblock454

    bigblock454 Clack Clack Clack Premium Member

    Jun 18, 2002
    Likes Received:
    Terre Haute IN
    Sorry man, sounds more like you have a blown head gasket. when the engine is hot (190 on the temp) look into the over flow tank and check for bubbles while the engine is at idle.

    Keep in mind, some bubbles are ok if you have had the system open. Changing the hose, thermo etc.

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