I've got a brakes issue hopefully someone can help. I extended my brake line 10" to put a 8" riser on my 1997 Summit. Now my brakes start cooking when I'm running down the trail or playing in the powder, it's like my brake fluid is boiling. If i crack the bleeder it will loosen up for 5-10 minutes, then it does it again. At first I though I was using the wrong brake fluid but I switched to DOT5.1 and its still cooking. Any ideas why it is boiling?