Join Date: Sep 2007
Location: Hillsborough, NJ, USA
Not a Leaking Brake Caliper
For about the last month, I have been getting oil on the front left brake caliper of my 99LT (55K miles). I clean it up, and it returns within about 3 or 400 miles. I figured it was a leaking brake hose, but I could not for the life of me find the leak. Tried to pressurize the system by pumping the brake, but still could not fine the leaking hose. I concluded it was probably an internal leak in the brake caliper, one of the pistons probably. See first two pictures below.
In checking against information on this site, there was a suggestion that the oil may be coming from a leaking fork, and not the brake at all. Well, see third picture, YES, it was a leaking front left fork.
Coincidentally, I had bad tire wear on the left side of the front tire. See picture 4. That is an Avan Azaro tire with about 12K miles. Left side is badly worn, down to the cords.
So in replacing the tire, I removed and replaced the oil seal on the left fork. Lo and behold, that was the problem. Have about 400 miles on the new tire/fork seal and no more leaks.
Just in case anyone else has a similar problem, it wasn't a leaking brake caliper!
2011 vStrom DL650