[DeTomaso] Alum Heads- Galvanic action

adin at frontier.net adin at frontier.net
Wed Aug 6 19:44:39 EDT 2008


All these points are true (need GOOD grounds, can measure voltage, need anode)

thanks to all for the tips.


David


Quoting steven.liebenow at att.net:

> Dave was concerned:
>
> Alum heads - antifreeze -What should one do to prevent the chemical
> (galvanic?) action in the cooling system??
> Is antifreeze enough?  Do I need a sacrificial anode?
> Any tips/thoughts/theories appreciated.
>
> David in Durango
>
> Dave,  Make sure that your ground strap is securely connected trans   
> to chassis, or a second strap, engine to chassis.  Leaving none is a  
>  sure recipe for disaster. Ask me, I'll show you the parts.... Let's  
>  just say that the current will flow to ground thru any means   
> possible!!!!
>
> You can also get "Rad-Caps" radiator caps with a sacrificial anode   
> hanging on them for an easy to use deal. Reasonable price.  And they  
>  work!  I chewed up half of the anode in about 1-2 months until I   
> found that I was missing the ground strap on my Mangusta!!! Only   
> discovered it when I pulled the aluminum Boss 302 factory manifold   
> off and discovered white fuzz (corrosion!) growing on all the water   
> passageway connections to the heads!!!
>
> Put on a ground strap and the anode hasn't (noticeably) changed   
> appearance in several years!
>
> You can also measure voltage drop from your coolant to ground, or   
> for that matter current....set your DVM on tiny....
>
> Steve
>
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