
So what to do next? Clean the zinc off where the copper washers sit? Apply a paint coating over the zinc to electrically separate the metals, although the electrical path will still go thorough the bolt? My preferred option is to use dowty seals in place of the copper washers. I know I can get these seals with a 200 degree C rating and they're already used on the oil cooler, so they can easily handle the pressure. My gut feeling is that they should be able to handle the job with little issue, my main concern is whether the heat soak at the turbo exceeds the thermal rating of the dowty seal. In operation it shouldn't get hotter than the temperature of the coolant flowing through the pipe.
Does anyone have any other ideas or options, or am I worring too much about the copper to zinc galvanic issue? It's probably not an issue on the oil lines as oil is a non conductive fluid, but if I'm getting rid of the copper washers, I'll swap them all out.
Thanks in advance to the LEC brains trust on any in-coming advice.
