I know nothing about intake heaters. But that's basically a long series resistor. And when the folds touch each other, it may be kind of shorting out across them. Not a "true" short, as it still needs to go through the rest of the long resistor. But I'm guessing that doesn't do it any favors, anyways. If it's possible to keep the bare metal from touching itself, that's probably better.I had a few minutes today to look at the heater element, looks like it gets so hot that it will melt together in places.