Guy H Posted June 8, 2009 Share Posted June 8, 2009 ok, on my way back from Belgium last weekend we had to stop on the motorway due to the terrible smell of burning friction material, and the small matter of the smoke and small fire inside the n/s wheel arch (safely extinguished with a bottle of water ) Following a trip home on the back of an RAC truck I went to work. Presuming the caliper had seized I ripped it apart and changed all the seals and pistons bolted it back on, new pads and ............ blinking thing did it again !!!!! Now I have worked out what's happening - the pressure is not being let go from the n/s caliper after braking. It releases from the o/s front and the backs are fine, just the n/s front. If I undi the bleed nipple and release teh pressure, I can spin the disc again. SO wtf is going on ....... pressure reducing valve??? that seems to be the only thing that the one brake is connected to by itself - the master cylinder works both fronts so it shouldn't be that 'pumping up' Anyone else come across this before? is the PRV cleanable/rebuildable? it's a '98 300tdi with the 5 line PRV Guy Quote Link to comment Share on other sites More sharing options...
disco_al Posted June 8, 2009 Share Posted June 8, 2009 sounds like an internal collapse of one of the flexible hoses to me. as you are braking, the fluid is being forced under pressure into the caliper, past the restriction, when you let go of the brakes, the restriction closes back up, causing the caliper to bind, until the pressure eventually releases itself back. change the flexi hoses first. Quote Link to comment Share on other sites More sharing options...
Guy H Posted June 8, 2009 Author Share Posted June 8, 2009 change the flexi hoses first. I'll go and try it now - I've got a 200tdi I'm breaking so hopefully one of those will fit thanks, hadn't thought of that Quote Link to comment Share on other sites More sharing options...
disco_al Posted June 8, 2009 Share Posted June 8, 2009 IIRC 200's had twin line brakes and 300's have got single line Quote Link to comment Share on other sites More sharing options...
Guy H Posted June 8, 2009 Author Share Posted June 8, 2009 IIRC 200's had twin line brakes and 300's have got single line yes, I was hoping the fittings would be the same then I would have 4 to choose from - but no just off to go and get one now Cheers Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.