Edelbrock Head Issue - Anyone else have this problem?

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  1. Detroit Iron

    Detroit Iron Well-Known Member

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    My car, '64 Barracuda with 340, wouldn't turn over all of a sudden. Long diagnosis story short.... water got into cylinder #7 and it was hydrolocking. I pulled the head and found where the coolant was getting in.

    These heads are Edelbrock's initial release of the aluminum head for Chrysler small block, so they are about 15-18 years old.

    I'd like to know if anyone else had the same issue with Edelbrock heads. I'd like to know what causes this, or was there a flaw in production. Thanks for the input.

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    • SGBARRACUDA

      SGBARRACUDA ROY FABO Gold Member

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      Is that the head or the head gasket? If the head you can have it fixed.
       
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      • 72Dart6pack

        72Dart6pack Harder Better Faster Stronger.

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        It's gotta be the gasket
         
      • Demonic

        Demonic Well-Known Member

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        If that's the head, it looks like aluminum corrosion. Did you keep up with fresh coolant every few years?
         
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        • Detroit Iron

          Detroit Iron Well-Known Member

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          That's the head. No, I'm not faithful with coolant changes.
           
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          • TrailBeast

            TrailBeast AKA Mopars4us on Youtube

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            Electrolysis ate the aluminum.
            That's why they make zinc anode radiator caps, drain plugs and a couple of other methods of anti corrosion.
            Of course it could have also been a thin or porous area in the casting, and it looks like both to me.
             
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            • Plymouth 65

              Plymouth 65 Floorable Deplorable

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              Sure looks like corrosion to me. You could fix them and have them checked. 65'
               
            • RustyRatRod

              RustyRatRod Bla de blizhibliz de blatde blizi bla bla FABO Gold Member

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              At least it's aluminum and easily repairable. I would be concerned about other places in that head as well as the other one.
               
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              • rumblefish360

                rumblefish360 So close, yet so far away FABO Gold Member

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                I’ve had my Edelbrock as cast, OOTB, on the car for a little longer than yourself. I got them in, *I think* it was ‘96 or ‘98. No issues. They don’t have a ton of miles, but many miles are on them. I recently disassembled them. Some of the valve tips took a beating last time around with bad set of lifters collapsing creating lash problems and no lash caps. They came out pulling some guide material with it. The reason I took them apart was because 2 valves leaked a tiny tiny bit of break kleen when I was cleaning and doing a basic check for the next engine.

                I figured perhaps, just perhaps, a little addressing of the valve seat area would do. I quick hit with some stones on a old machine and slam it back together and I’ll be OK.

                A little welding will do the trick I think.
                 
              • dazedand confused

                dazedand confused Well-Known Member

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                My guess during the casting process there was a weak spot in the aluminum maybe pocket of bubbles or slag: contaminates that collected in that spot and was weak and with the heating up and cooling with the antifreeze it ate away or broke apart the weak spot? Grind it out to clean up the hole inside and out and have a welding shop aluminum weld it up and then file , grind and or sand it smooth. I had to do that on an edelbrock performer intake where the coolant flows and to seal up the heat cross over port hope this helps? Yes also use that zink anode rode 2-3"'s long for inside the radiator to counter act the chemical reaction between the coolant and the aluminum. You can buy one in the speed catalogs jegs ,summit
                 
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                • MOPAROFFICIAL

                  MOPAROFFICIAL FABO Gold Member FABO Gold Member

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                  The things that people forget, wonder who else is about to end up like this. Take it to a machine shop, they can fix it.
                   
                • Oldiron440

                  Oldiron440 Well-Known Member

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                  I'll add it to the list of things I've seen on an Edelbrock head and I've seen a lot of junk heads just out of the box....
                   
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                  • dazedand confused

                    dazedand confused Well-Known Member

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                    Thats what happens when they hire foreigners to work in their factories
                     
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                    • brian6pac

                      brian6pac Well-Known Member

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                      Get a Ph meter and check the coolant and see what it is. That is the only way to tell if it is out of range. I get so tired of hearing people say you didn't change the coolant and it killed your motor when they don't even know what a Ph meter is.

                      That looks like a porous casting to me.
                       
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                      • RustyRatRod

                        RustyRatRod Bla de blizhibliz de blatde blizi bla bla FABO Gold Member

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                        Hell, we're luck now if Edelbrock even casts a thing over here anymore.
                         
                      • famous bob

                        famous bob mopar misfit

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                        why didn`t you clean the edges of the valve tips up w/ a file before you pulled them out, don't goof up the guides that way .
                         
                      • famous bob

                        famous bob mopar misfit

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                        AGREE , HOW DO U PEOPLE THINK CHINA GETS IT COPIES SO CLOSE ?
                         
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                        • Oldmanmopar

                          Oldmanmopar Going left turning right FABO Gold Member

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                          Special coolant is needed for aluminum to stop corrosion.
                           
                        • brian6pac

                          brian6pac Well-Known Member

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                          I hate to say it but the Volvo or Saab Blue coolant stays stable longer than any thing I have seen It's all I ever ran in all my bikes and never seen any corrosion at all.
                           
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                          • 69_340_GTS

                            69_340_GTS Well-Known Member

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                            Not really "special". Any modern coolant you buy is good for use on aluminum. 99% of the cars being made today have aluminum radiators and/or engine blocks/heads.
                             
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                            • 69_340_GTS

                              69_340_GTS Well-Known Member

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                              Porous casting.
                               
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                              • RustyRatRod

                                RustyRatRod Bla de blizhibliz de blatde blizi bla bla FABO Gold Member

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                                While I agree 100% that aluminum should have a coolant that is friendly to it, that's more than corrosion. Even for that length of time. The deck on those heads is 5/8" thick. Grab a 5/8 wrench and look at that gap. There had to be an air bubble in the casting right there. No question about it.
                                 
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                                • rumblefish360

                                  rumblefish360 So close, yet so far away FABO Gold Member

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                                  Oh yea.

                                  You did read that of the heads age being it is it a new head OKTB into the car. He said;
                                  Are you saying Edelbrock doesn’t cast there heads here in America? It’s all a lie?

                                  You assume to much.
                                  I’ll answer that in my thread on the my Edelbrock heads.
                                  This is not my thread.

                                  Easy, purchase a few heads and start in with the band saw. Make molds and improvements along the way.
                                  This reminds me of a FBBO thread where a fella went nuts on a set of Poly 318 heads. He made rubber like molds to mimic the heads chamber for custom pistons. This also reminds me of a few threads here where I enquire about the material used to make rubber molds of the head ports.

                                  To invent is Genius.
                                  To take the genius item and improve upon it is smart.
                                  To copy is to flatter & rob the genius of there reward.
                                  To copy & improve upon an item, make cheaply and resell is just being a pirate. Just like insurance & taxes. It legal. I’m not saying it’s right, just legal and easy.
                                   
                                • RustyRatRod

                                  RustyRatRod Bla de blizhibliz de blatde blizi bla bla FABO Gold Member

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                                  Yes. I'm saying Edelbrock doesn't cast all their stuff here. You don't have to do every process in this country to claim "MADE IN USA". I know a local porter well who says he started noticing Edelbrock quality getting on par (going down) with import heads about the late 90s. He's called and talked with them before and said it was like talking to a merry go round. Never got a straight answer. He actually really likes the Pro Comp castings. Says they are very high quality.
                                   
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                                  • toolmanmike

                                    toolmanmike FABO MODERATOR Staff Member FABO Gold Member

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                                    If you don't have PH test strips, here's a good way to test your coolant for acid. Your radiator/coolant will actually produce voltage. (electrolisis) Not a good thing for corrosion.

                                    Capture.PNG
                                     
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