Tornado
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- Joined
- Dec 5, 2017
- Messages
- 4,865
Spent a good number of hours assisting a newish owner of a MKIII sort out a leaking rear OEM caliper. New pistons, seals fitted after llts of careful cleaning of seal grooves etc. All went fine until the bleedig. Could not get a good fllw of fluid through and out into drain hose. With lots of pressure on foot lever, cracking open bleeder less than 1/4 just gave very little fluid moving out. Opening more just have frothy foam around bleeder end of hose. Tried this many many times with no real improvement. Also put big gob of grease around base pf bleeder to stop air being sucked past threads. No improvements. Tried my MityVac on bleeder hose to suck fluid out, got loads of vacuum as per the guage, but again no fluid up the hose, no change on MC fluid levels. Also tried pushing fluid into bleeder via a syringe, again no movement into caliper.
Went back to foot lever high pressure pumps as that was only way to move any fluid at all, just very slowly. Kept at it more than an hour, never got more than may be 1 complete reservoir volume of old stuff out. But the pedal was firm and new pads making good force on disk. So we packed it for the night.
Thoughts on what problem was? Maybe a blockage somewhere, even bleeder itself?
Went back to foot lever high pressure pumps as that was only way to move any fluid at all, just very slowly. Kept at it more than an hour, never got more than may be 1 complete reservoir volume of old stuff out. But the pedal was firm and new pads making good force on disk. So we packed it for the night.
Thoughts on what problem was? Maybe a blockage somewhere, even bleeder itself?
