Xantia TDSX 94 Brake Issues!
Messages 1 to 12 of 12.
Some expert advice (in laymans terms) would me much appreciated as the old girls not ready (in my opinion) for the scrappy just yet! Many thanks.
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Sorted it! Somehow air got into the system and I only bled the front calipers the first time and didn't clear all the air correctly, so this is what I did. First I set the suspension to its highest setting, as to keep an eye on the fluid level, Removed the rear wheels and bled them with the engine running and with the help of an assistant i.e a piece of wood to hold the peddle down, did the same with the front calipers till all the air and throthy oil came out till it ran clear. Amazing, sharp as ever and happy the old girl will live on to pass another mot! Even though I answered my own question I hope this information will be useful to an equally daft amateur machanic!
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___________________ do,nt eat yellow snow
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Well the steering does seem to have improved a lot. but I dont see how because the air seemed to be in the calipers and brake lines. I'm all ears if you can explain anything. Maybe air was/is geting into the system somehow, or the recent mild weather has something to do with the steering improving? Its beyond me whatever it is! Cheers. Dav.
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I have read on the DS modle that the regulator sphere , if down on presure the stearing go,es stiff. also the universal joint on the stearing column seize up, [lots of wd40+ spray grease]. Just had all my spheres replaced, and the problem has gone.?? But now ?? wait and see.
Because it,s all one system. brakes. steering suspention. Maybe i am right ??? Chris
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The problem is still there I'm affraid. Had to bleed the brakes again as they were playing up as before. This does however solve it for a few weeks so I guess i'm getting air in somewhere. I spoke to another machanic who said usually if the drums are wet it means the cylinders are the problem. But I have discs at the back so that blew that theory. In that case he said, the master cylinder is the problem and will result in a expensive repair. The clutch is vibrating heavily from a standing start and with 200k on the clock, I have no idea when the cam was last changed either. You could say its days are numbered as i'm not prepared to fork out for major surgery! Coming soon! One 94 xantia TDSX Breaking for spairs!!!!!!!!!!
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Forget what your mechanic told you it's a Citroen and has no master cylinder the hydraulic system operates the suspension,brakes and steering. To bleed the brakes it needs to be done in order. First raise and lower the suspension Maximum to Minimum several times then with it set on maximum jack up and support the car.Remove the wheels,start the engine and leave on idle then bleed the brakes in the following order 1 L/H Front 2 R/H Front 3 L/H Rear 4 R/H Rear. Check the level of the hydraulic reservoir and top up if necessary.With the car still supported and the engine running turn the steering from lock to lock several times this will expel any air in the steering system. If the steering is still stiff it will be a faulty flow distributor or control valve.
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I did question the master cylinder but he assured me there was one. It sounds like he was talking out his ****! Many thanks for your advice and it sounds like you know your stuff, so I'll try it out as soon as I can get my hands on some fluid and i'll let you know how I get on. Even after Bleeding the brakes they do still tend to surge. Will bleeding them properly erase this? If possible, could you tell me how air got there in the first place, basically what I did wrong??!! Thanks again for your help. Dav.
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If you are getting air in the system you need to check all pipes and unions for leaks (Have you been losing fluid,if not you have not got a leak) The Xantia brakes favour the front and the rear only work under heavy braking or heavy load.When you have bled the brakes if you still have the brake surge test drive and brake gently if the surge is still there it must be the front brakes.Possible faults are warped discs,brake control valve,and if you have ABS it could be a fault with the control unit. Hope this helps.
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The flow distributor and control valve.? is there a kit you can get, or is it main dealer? and or thay a pain in the bum to replace, sounds as though you know what your on about Chears Chris
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Brakes are much better now thanks. Although the slight surging is still there. Its not major but wonder if they'll pick up on it at M.O.T time? Am I right in thinking the surging has nothing to do with air being in the system? As far as leaks are concerned, everywhere is dry appart from there's always fluid on top of the reservior. I always put it down to the filler cap being a poor fit. Maybe the pipes going into it are cracked/damaged? I guess this would be sufficient for air to enter the system? I'll clean it up and see where its really coming from. Chris, sounds like you still have issues? Cheers and beers jpt, you've been most helpful!
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You can get a kit but as far as I know it's only at a main dealer although Citroen parts are more available at motor factors now so you could try them.I have no idea of the price sometimes a complete unit is cheaper than trying a fix.
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Messages 1 to 12 of 12.
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Edited by Dav 14 February 2009, 10:51 AM
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