Thermostat housing leaking

Discussion in 'Forced Induction Mopar' started by DARTGAME, Sep 29, 2017.

  1. DARTGAME

    DARTGAME FABO Gold Member FABO Gold Member

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    Thermostat housing under weiand 144 leaking,can't get it to seal. Looks like I have to pull the blower to get to it. What is everyone using for a thermostat housing?

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  2. DARTGAME

    DARTGAME FABO Gold Member FABO Gold Member

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    More photos

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  3. 4spdragtop

    4spdragtop FABO Gold Member FABO Gold Member

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    Chrome ones are famous for leaking. You can lay down a piece of glass(super flat), sandpaper on the glass, then tstat housing on it to try and "true" the surface up. Not sure of who makes a good angled one.
     
  4. DARTGAME

    DARTGAME FABO Gold Member FABO Gold Member

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    Thanks for reply, yeah thought about having it surfaced flat or just buy something better
     
  5. Johnny Dart

    Johnny Dart Well-Known Member

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    Give the chrome stat housing to your neighbor, and get a factory cast one.
     
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    • Golden_commando

      Golden_commando Active Member

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      Get an aluminum one or stock or steel, the chrome ones are made of pot metal with heat they tend to warp, you can try to sand it flat but with time they will warp again.
       
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      • pishta

        pishta I know I'm right....

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        O-ring it.
         
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        • DARTGAME

          DARTGAME FABO Gold Member FABO Gold Member

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        • AJ/FormS

          AJ/FormS 367 FormS clone 3.09-1.92-1.40-1.09-.78od 3.55s

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          If you machine it flat, you may have to also machine the stat-receiver shelf. If left too shallow, the stat will cut the gasket, and prevent the sandwich from stacking flat; and that will cause the freshly machined housing to warp as soon as the bolts are tightened. Pressure test it before the blower goes back on,lol.
          I install studs into the manifold, and use slanty manifold washers to spread the clamping load. Those special washers were also used on factory 318LAs on the 4 corner studs of the exhaust manifolds.
          Up here in igloo-land I get away with a 7psi cap. That is an immense relief on the cooling system.
           
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          • intergalactica

            intergalactica Well-Known Member

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            After trying 3 chrome housings and still getting a leak, I went back to using a cast iron one and my nightmare was over... no more leaks!
             
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            • AJ/FormS

              AJ/FormS 367 FormS clone 3.09-1.92-1.40-1.09-.78od 3.55s

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              I love happy endings
               
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              • Coyote Jack

                Coyote Jack Member #55, I'm old FABO Gold Member

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                My cure for the problem was to use a housing that was flat with no shelf for the thermostat and put it together without a stat. The install an inline thermostat out where it would be more accessible. Works perfect and is much easier for future service.

                Jack
                 
              • twayne24365

                twayne24365 Well-Known Member

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                So true, been through 3 gaskets on mine, even set it up in a Bridgeport to mill the surface... still leaks lol
                 
              • barbee6043

                barbee6043 barbee 6043

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                the old aluminum on my slants always have a tiny pinhole in it!!!!!
                 
              • DesertRat

                DesertRat I don't care it's all psychobabble rap to me. FABO Gold Member

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                I also had to try two chrome housings, the first one was a total fail before I rebuilt my engine. After I rebuilt my engine, I thought I could get the chrome one right and it did hold for about 800 miles then started leaking also. I dug out one of my stockers for my motor and planed the base for flatness and carefully reinstalled it and no more leak. I am using a 12# radiator cap. The only down side for me was I had the heat shrink hose clamps on all the hoses in my engine bay and now I have one SS screw clamp on the redone thermostat housing. At this point I am good with it, no leak:)
                 
              • cpearce

                cpearce Well-Known Member

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                I used a Mopar Performance chrome one with no gasket, only a thin bead of blue Permatex. I ordered a chrome one from local parts store before the Mopar one, although they look almost identical they are not. The Mopar one sits flat on a smooth surface while the whatever brand one did not sit perfectly flat and would rock from side to side if wiggled by hand. I should add that I use Evans coolant and a 7lb cap.
                 
              • DARTGAME

                DARTGAME FABO Gold Member FABO Gold Member

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                I would like to find something that I don’t have to pull the blower off every time. Might look for something with a lower profile on the mounting edge to slide between the blower. Thanks for everyone’s input.
                 
              • MiradaMegaCab

                MiradaMegaCab Well-Known Member

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                IMG_0450.PNG Nice setup DartGame. Try an offset thermostat housing.
                 
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                • MiradaMegaCab

                  MiradaMegaCab Well-Known Member

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                  Is that a DLI Blower manifold?
                   
                • DARTGAME

                  DARTGAME FABO Gold Member FABO Gold Member

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                  Yeah I believe so, I just got this car about a month ago.

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                  • MiradaMegaCab

                    MiradaMegaCab Well-Known Member

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                    IMG_0451.JPG
                    You're lucky, on most of the DLI manifolds the thermostat housing is welded shut. Notice the two nipples welded in on the manifold..
                     
                  • MiradaMegaCab

                    MiradaMegaCab Well-Known Member

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                    IMG_0458.JPG Another one of DLI's hack jobs.....WTF?
                     
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                    • DARTGAME

                      DARTGAME FABO Gold Member FABO Gold Member

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                      Haha, I won't be doing that! I would rather it stay leaking.
                       
                    • DARTGAME

                      DARTGAME FABO Gold Member FABO Gold Member

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                      Well after about two months of fooling around with the chrome piece(had it surfaced) and purchased multiple water necks I found the right set up. Along the way carburetor leaks and wiring issues! Ha! Back on the road.

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                      • DARTGAME

                        DARTGAME FABO Gold Member FABO Gold Member

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                        FYI, ended up buying three different water necks and spending about $480 total on it. Now I have three brand new water neck paper weights!

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