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Your choice of three steering fluid flush methods ?

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Rombbb
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Your choice of three steering fluid flush methods ?

Post by Rombbb » Thu Jul 19, 2018 9:52 pm

Am planning on doing as complete a flush as possible and the online sources each seem to have their own pro's and cons :

---> Turkey bastering, filling up, engine start, turning wheel end-to-end, redo until clear fluid

Will be quite hard to recognize 'clear' from a black reservoir and guess will always keep old stuff in

---> Disconnecting oil line from rack cilinder, turning the wheel

I guess without the pump running you won't get all fluid from around pump area, with the stationary blades acting as a seal, although the rack is the lowest point of the system so maybe it does work if fluid can drain past the pump

---> Disconnecting return hose from reservoir, letting engine run with steering wheel straight, adding to reservoir until clear fluid exits hose

I guess this way you don't get all old fluid from PAS cilinder with steering wheel straight only (will remain old fluid left and right from the valve in the rack cilinder)

Probably the best is doing a combination of them, but that in itself has cons.

What's your way ?
Last edited by Rombbb on Thu Jul 19, 2018 11:00 pm, edited 1 time in total.

Mangozac
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Your choice of three steering fluid flush methods ?

Post by Mangozac » Fri Jul 20, 2018 11:48 pm

Current: 06 E85 M Silbergrau
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Rombbb
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Your choice of three steering fluid flush methods ?

Post by Rombbb » Sat Jul 21, 2018 4:25 pm

Mangozac wrote: Fri Jul 20, 2018 11:48 pm I'd just do the BMW technique:

https://workshop-manuals.com/bmw/z_seri ... page_1012/
Thanks !

BMW seems to specify topping up only, not a full drain. Getting it in is the easy part, getting it out is what's it about :)

Mangozac
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Your choice of three steering fluid flush methods ?

Post by Mangozac » Sat Jul 21, 2018 9:54 pm

Honestly, getting it out really isn't that critical. It's only low pressure hydraulic fluid - I bet the majority of cars get through their entire lifespan without ever having had it changed!
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Your choice of three steering fluid flush methods ?

Post by Beedub » Sun Jul 22, 2018 6:41 pm

just suck it all out from the top and replaced it.... or release one of the hoses to the pump. job done!
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Your choice of three steering fluid flush methods ?

Post by Spaniarduk » Mon Jul 23, 2018 4:31 pm

Is there not an accessible low pressure return pipe that exits the rack and goes into the reservoir tank? I would think the ideal would be disconnecting this pipe from the reservoir. Plug that port in the reservoir tank. Use that pipe for drainage. Have someone constantly pouring fresh fluid into the reservoir while somebody else turns the wheel from lock to lock. The job is done when fresh fluid comes out. Hey presto! :tumbleweed:
Im so good at doing things in my head. Shame that they dont always turn out the same way in reality... :?
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