pistonbroke Posted April 8, 2010 Share Posted April 8, 2010 The last couple of days I've noticed my dump valve isn't venting like it used too. I've got a video here explaining and showing the problem. It still seems to vent when the car is cold, but once warmed up, I get nothing below 4k. Quote Link to comment Share on other sites More sharing options...
Abz Posted April 8, 2010 Share Posted April 8, 2010 Video is still processing on YouTube Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted April 8, 2010 Author Share Posted April 8, 2010 It's not that exciting I'm afraid Quote Link to comment Share on other sites More sharing options...
Abz Posted April 8, 2010 Share Posted April 8, 2010 It's not that exciting I'm afraid I get easily excited Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted April 8, 2010 Author Share Posted April 8, 2010 vid is working now. Quote Link to comment Share on other sites More sharing options...
Rob_Mitchell Posted April 8, 2010 Share Posted April 8, 2010 I get easily excited ill wear a bikini to the next meet..... where is everyone Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted April 8, 2010 Author Share Posted April 8, 2010 having looked around at dump valve prices, it seems bailey are pretty cheap (it came on the car when I bought it). My thinking is the spring/mechanism is not closing fully when on positive pressure, unless the pressure is strong enough (higher revs) to make it close. Quote Link to comment Share on other sites More sharing options...
Rob_Mitchell Posted April 8, 2010 Share Posted April 8, 2010 the spring might have just weakened over time perhaps? and is only opening when you really boot it i.e- above 4000 revs Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted April 8, 2010 Author Share Posted April 8, 2010 I can see it moving even under low load (low revs), but I don't think it's sealing. It also seems to have got quieter recently, it used to make a racket, now it's a little chirp. Quote Link to comment Share on other sites More sharing options...
Rob_Mitchell Posted April 8, 2010 Share Posted April 8, 2010 time for a new one? ill have this one i can blow in it with the window open. im sure someone will have the an answer mate Quote Link to comment Share on other sites More sharing options...
themodifiedkid Posted April 8, 2010 Share Posted April 8, 2010 Are you in ttc mode. I noticed before i went ttc it would pssssst at low revs as that when the first turbo is on line but now im ttc its the same as yours as there is no turbo lower down the revs and obviously both come into gether later in the rev range. I hope this makes sense Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted April 8, 2010 Author Share Posted April 8, 2010 no, mine is still in sequential mode. Quote Link to comment Share on other sites More sharing options...
a98pmalcolm Posted April 8, 2010 Share Posted April 8, 2010 (edited) 1st thought that came into my head is there isnt enough boost to open the valve... if u sure it used to open at low standing rev (would be a weak spring if so lol) But the baily valves are easy to service yourself, i used to do mine all the time on my corrado, as oil builds up sometimes and make the piston in the BOV all sticky at the sides causing the valve to need more boost to open up as quick. Your valve is a lil different to the one i had, but all i had to do is unscrew the allen keys at the top. The top will pop up from the pressure from the sring so hold it together as u take out the screws. you will see how simple the contruction on the valve is as only 2 parts will come out, the spring and the piston (cycler shapped peice of metal) get one disk brake cleaner in a can and some kitchen role ad clean away And then when its all shiny and looking new, reassemble and see what happens. But it deffo wont be the spring gone, if it is it will open even easyer! Edited April 8, 2010 by a98pmalcolm (see edit history) Quote Link to comment Share on other sites More sharing options...
Abz Posted April 8, 2010 Share Posted April 8, 2010 ill wear a bikini to the next meet..... where is everyone Don't think I'll be coming to the next meet! Dan, I am not 100% sure but would have given similar advice to what Malcolm has given above. Thing is when you are idle & then revving less pressure is getting through to open the values, so at a higher rev more more is getting through, if it is sticky then it would explain this behaviour. I assume that this is the same when driving along? Nice R6 by the way Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted April 8, 2010 Author Share Posted April 8, 2010 Well, I've pre-emptively been doing what malcolm has suggested. I took the BOV off.... As you can see, my leaking seals have caused some oil to blow out the valve, no doubt causing bits of crap to stick to the oil mist and make the smooth operation of the valve a bit sticky. So, I stripped it down and cleaned everything. I also noted that the nipple for the small vacuum pipe was loose enough for me to unscrew with my fingers, this may have caused some slight leaking. Re-assembled, nice and clean (how can these things cost so much money, there's sod all in them) Here's a video clip of it running having been stripped and cleaned. You can see how low the revs are now that make it vent compared to the other video Quote Link to comment Share on other sites More sharing options...
scotty71 Posted April 8, 2010 Share Posted April 8, 2010 confusious says shit in dump valve makes for poor venting Top job in fixing so quick and I liked the neighbours jibe;) Quote Link to comment Share on other sites More sharing options...
a98pmalcolm Posted April 9, 2010 Share Posted April 9, 2010 thought that mite sort it glad to see it all workinh Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted April 9, 2010 Author Share Posted April 9, 2010 Thanks for your help chaps. Quote Link to comment Share on other sites More sharing options...
Septic Posted April 19, 2010 Share Posted April 19, 2010 Haha great second vid. You're right...your neighbours must hate your guts! I wouldn't. At 2 am I heard a Supra rev and then I......jizzed in my pants. Nice work on sorting out the BOV. Quote Link to comment Share on other sites More sharing options...
Guest argy911 Posted April 19, 2010 Share Posted April 19, 2010 Are you sure you have'nt got your vacum pipe from your washer jets ? 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.