dani_r Posted August 7, 2010 Share Posted August 7, 2010 Well, ever since I had my TT engine conversion done by Keron last year my PS pump have whned a bit, and I always thought it was just a loud pump! However, upon opening the lid on the reservoir yesterday I discovered BLACK fluid! Hopefully I can get a replacement quickly, but why would it be black? Hopefully it's not steering rack related Any ideas? Cheers Dan Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted August 7, 2010 Share Posted August 7, 2010 Not sure on the black stuff mate & sorry to hear you have an issue. I have a spare PS pump I bought off a member on here If your interested. I thought mine was on its way out, ended up being something else. Quote Link to comment Share on other sites More sharing options...
Dnk Posted August 7, 2010 Share Posted August 7, 2010 The fluid is really old would be my guess. Autobox ATF goes exactly the same when its old Quote Link to comment Share on other sites More sharing options...
DodgyRog Posted August 7, 2010 Share Posted August 7, 2010 (edited) Try a fluid change mate, mine was the same, whining and darkish (not black though) fluid, changed it and it's fine now Edited August 8, 2010 by DodgyRog (see edit history) Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted August 8, 2010 Share Posted August 8, 2010 Usually black fluid is due to worn rack seals. Seiously overheated oil can go black. Usual cause of overheated fluid is letting Jamie P drive the car at Llandow. Quote Link to comment Share on other sites More sharing options...
dani_r Posted August 8, 2010 Author Share Posted August 8, 2010 Usually black fluid is due to worn rack seals. Seiously overheated oil can go black. Usual cause of overheated fluid is letting Jamie P drive the car at Llandow. What kind of a fix is this? Is it a nightmare to do? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted August 8, 2010 Share Posted August 8, 2010 Just wash out the reservoir and give it a full fluid change for a start, and see if it gets dirty again quickly (2000 miles / or a month). If it does it may be heading towards rack trouble. Fairly easy to change, but an expensive part new from Toyota Quote Link to comment Share on other sites More sharing options...
mobsta_01 Posted August 9, 2010 Share Posted August 9, 2010 Toyota quoted me over £900 + vat for a new rack. I ended up just getting mine refurbed instead. Quote Link to comment Share on other sites More sharing options...
Gambit Posted August 9, 2010 Share Posted August 9, 2010 Toyota quoted me over £900 + vat for a new rack. I ended up just getting mine refurbed instead. Wow that must be a great rack. Quote Link to comment Share on other sites More sharing options...
Suprash Posted August 10, 2010 Share Posted August 10, 2010 Usually black fluid is due to worn rack seals. Seiously overheated oil can go black. Usual cause of overheated fluid is letting Jamie P drive the car at Llandow. You saying that Chris, I was talking to Mark Luney, Chris Arther and Co who run the Pro Supra and they mentioned that they have had constant trouble with the PS fluid over heating caused by drifting. Are the Supra's prone to over heating fluid ? I suppose because the pump is constantly working if you're driving sideways. Is that the reason why it would over heat ? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted August 10, 2010 Share Posted August 10, 2010 Yes, of course, constant lock to lock action with huge wheels and tyres will boil the fluid. Jamie P had fluid overheating at Llandow when I was there once, due to his "flamboyant" driving style Any PAS set up will gain a huge amount of heat in that sort of usage. Normally a car driven on a race track will be unlikely to have problems, as there are long straights and the driving is far smoother with far less aggressive and prolonged steering input. If you get up against the rack stops the pressure in the system goes right to the bypass valve level, and temps will go ballistic. A small cooler in the return line to the pump should cure it. Over hot fluid kills PAS racks in no time. Quote Link to comment Share on other sites More sharing options...
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