Block heater problems? Galvanic corrosion?

Joined
Aug 24, 2014
Messages
665
Location
WA
Got my block heater in the mail today. Freeze plug variety. I noticed the heating element is copper... Or copper looking. Well being a Subaru, everything else in my motor is aluminum. Don't aluminum and copper tend to react negatively with each other? Galvanic corrosion?
 
Joined
Aug 14, 2010
Messages
12,966
Location
Northern Kentucky
The corrosion inhibitors should be able to cope with such a small amount of copper. Plenty of people use block heaters and i don't hear any big problems with them. This could effect your coolant interval though. I know mixing copper and aluminum in a water cooled pc system usually ends up pretty bad, but car systems are probably different.
 

SnowDrifter

Thread starter
Joined
Aug 24, 2014
Messages
665
Location
WA
Well I ended up installing it. Did a 70/30 coolant ratio when I filled it. Hoping the extra anti corrosion agents will do their thing. I guess only time will tell.
 
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