Brake line, brake cylinder... makes no difference. Leaks make for
sponginess because of poor piston conditions, air in the system, fluid
escaping under pressure, all kinds of reasons. Replace the cylinder
(normally you do both side because the other side is probably about to fail
if one did) and bleed starting at the wheel furthers from the master
cylinder and moving to the closest.

Jim

On Thu, Sep 29, 2016 at 11:21 AM Mark Pinnell <mark.stuart.pinnell@gmail.com>
wrote:

> Hi All,
> Brake pedal on my 85 Vanagon Westy (Pearl) was spongy, so I bled the
> brakes, but that has not cured the problem. It does appear that the left
> rear may have a very slight leak, but it doesn't seem to be be the brake
> line. I am thinking that it may be a leak in the wheel cylinder...   ...any
> thoughts would be appreciated. Pads are wearing, but still well within
> tolerances.
> Thanks in advance,
> Mark
>
> Sent from my BlackBerry® PlayBook™
> www.blackberry.com
>
>