[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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