Re: [DML] Stainless in coolant system
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Re: [DML] Stainless in coolant system



http://www.boatus.com/boattech/casey/23.htm

This is why the US Navy requires zinc based antiseize, suspended in
petroleum (not lithium), for steel fasteners in aluminum threads.

Coolant expansion tank itself is fine. Only the steel bolts that hold
it to the aluminum rivnuts could be at (minimal) risk. 

Moisture is extremely prevalent around the water pump and coolant
distribution pipe. That's why those fasteners tend to weld themselves
to the block and snap off when turned -- a very common DeLorean
affliction.

Snapped thermostat housing bolts aren't as great a concern because the
pump is usually being thrown away anyway.

Bill Robertson
#5939


>--- In dmcnews@xxxxxxxxxxxxxxx, Marc Levy <malevy_nj@...> wrote:
>
> If I understand the science behind this (and I am not sure I do),
the problem is that a battery is created because of the dissimilar
metals being separated by the liquid.  So, the "Potential Difference"
(or Voltage) created between the Aluminum and Stainless is what causes
damage to the Aluminum (the weaker metal).  
> 
> Assuming what I wrote above is correct, a wire between the SS bottle
and aluminum engine would "short" the battery out...  so there would
be a potential difference of zero...  But, would that stop the damage
to the Aluminum?
> 
> Maybe someone who understands this can explain it better.  :)
> 



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