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Drilling Brodix BBC aluminum heads for zincs

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Old 12-05-2017, 06:43 AM
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Default Drilling Brodix BBC aluminum heads for zincs

As the title says; does anyone have experience drilling and tapping the water jacket on Brodix BBC aluminum heads in order to install zinc anodes? Thanks.
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Old 12-05-2017, 09:24 PM
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Here is grumpys way of dealing with it. Not a lot out there I saw on the subject but ck this out anyway.


anodes | Grumpys Performance Garage
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Old 12-05-2017, 11:50 PM
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you can always use the coolant temp sensor ports in the heads as a location to put zincs as well. without drilling
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Old 12-06-2017, 12:49 AM
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Here is grumpys way of dealing with it. Not a lot out there I saw on the subject but ck this out anyway.


anodes Grumpys Performance Garage
Thanks. Did I miss a pic or decsription of where he puts them??
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Old 12-06-2017, 12:51 AM
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you can always use the coolant temp sensor ports in the heads as a location to put zincs as well. without drilling
Thanks but not on Brodix heads I dont think.
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Old 12-06-2017, 09:32 PM
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I'd just put them in the intake coolant passages. I drilled out the back of my intakes and tapped them NPT.
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Old 12-06-2017, 09:36 PM
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I'd just put them in the intake coolant passages. I drilled out the back of my intakes and tapped them NPT.
I've always thought about this as it's easy, however it is not contacting the heads per say. This is where I get confused with anodes. Do you have more info on this so I can understand better ?
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Old 12-06-2017, 09:38 PM
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I've always thought about this as it's easy, however it is not contacting the heads per say. This is where I get confused with anodes. Do you have more info on this so I can understand better ?
Heads bolts, brackets and fasteners are connecting them all together. (continuity)
Also, people might want to use Magnesium in fresh water.

http://boatzincs.com/pdfs/Chart_B-Which_Anodes_Should_I_Use.pdf

https://www.defender.com/html/zincs_info.html

Last edited by Rookie; 12-06-2017 at 10:19 PM.
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Old 12-06-2017, 09:52 PM
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I've seen what they call pencil anodes and come in various npt 1/8, 1/4, 3/8 and so on. Looks like a pocket on the brodix heads forward and above front exh port. Drilling in from the front would be ideal however accessories would be on the way. How about in the rear water jackets. You could go in easily without issues that I can see. Since there's not many with first hand experience I'm just trying to help.
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Old 12-06-2017, 09:58 PM
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I'd just put them in the intake coolant passages. I drilled out the back of my intakes and tapped them NPT.
that was my initial thought but like SB was getting at I wasn't certain the cast, steel, SS etc would effect the anode. Will have to read up on your link. I do recall two different anodes you don't want to mix but nothing to do with this.

It was zinc and aluminum anodes on the same boat. xxxx

Last edited by getrdunn; 12-06-2017 at 10:02 PM.
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