White mineral deposits..."S" Hose?

[MSDGN]

My GN sits quite a bit unfortunately...especially here in AZ in the summer...I noticed some white deposits(crusty) at each end of the "S" hose which I'm assuming are mineral deposits but I only run Distilled Water and RMI...so how can that be...there are no deposits around the ends of any of the other hoses...

 

[MSDGN]

So no one has had this happen or has an idea why it happened?...I'm going to remove the hose and just wondered if I should just clean it up and put the hose back on or replace the hose...

 

[Turbotre]

It sounds like electrolysis.

 

[Nick Micale]

Scott, I know you do not drive your GN often, but when was the last time you flushed the cooling system?

RMI has a limited life, and I usually refresh it with an 8 oz. dose once a year, and flush every 2-3 years in a very low mileage car.

Like was said, sounds like electrolysis because of the dis-similar metals, and the RMI effectiveness being used up.

 

[dr_frankenstein]

might be a good idea to toss in a sacrificial anode when you flush it if electrolysis is happening.

 

[Nick Micale]

If the cooling system is properly and routinely maintained with RMI-25, it will protect against electrolysis and other corrosive elements.

 

[turbo nasty]

While I dont have mineral crud on my hoses I do run distelled, RMI25 and a GN1 extreme radiator.
I had electrolysis building up in my radiator 2-3 tenths a volt actually.
Batt pos to batt neg engine running 14.3.
Batt pos to radiator tank 14.4-.5.
Ran a ground from radiator to ground and now it reflects system voltage.
RMI25 may not ward off the electrolysis in my case but it keeps the cooling system oh so clean!!!!