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E36 /7 Z3 (1996-2002)
E36/7 Z3 roadster and coupe talk with our gurus here.

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  #1  
Old 02-03-2012, 03:46 PM
nfunk nfunk is offline
1998 BMW Z3 2.8L
Location: New Orleans
 
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Mein Auto: 1998 BMW Z3 2.8L
Z3 power steering fluid

I noticed a few drops of oil under my 1998 Z3 2.8L and on further investigation I saw it was the infamous power steering hose coming down from the reservoir to the pump. The cap says "ATF Fluid".

Do I use Dexron III or Dex/Merc, or are these the same?

Any information is greatly appreciated!

Nick
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  #2  
Old 02-03-2012, 04:32 PM
dkindig dkindig is offline
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Dex/Merc is backwards compatible with all standard ATF fluids except for Type F (and Mercon V of course).

I'm finicky about name brands so I use Castrol Dex/Merc. Just about any decent quality Dex/Merc should be fine.
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  #3  
Old 02-03-2012, 05:41 PM
brianrparker brianrparker is offline
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Location: KANSAS
 
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Mein Auto: 1997 BMW z3
I used dex/merc. Also change that hose. I did mine it was pretty easy.
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  #4  
Old 02-04-2012, 05:27 AM
nfunk nfunk is offline
1998 BMW Z3 2.8L
Location: New Orleans
 
Join Date: Oct 2011
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Mein Auto: 1998 BMW Z3 2.8L
I got the Castrol Dex/Merc ATF. I plan on cutting the old compression clamp off and install a new hose clamp, until I can get the hose changed.

Thanks for the help!
Nick
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  #5  
Old 02-04-2012, 09:00 AM
brianrparker brianrparker is offline
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I used 2 hose clamps on mine. but make sure you get a STRONG hose clamp. The first ones i got broke when i was tightening them. So i was car less and had to call a friend for a ride. Tighten it down with like a 1/4inch socket drive. dont use the screwdriver or nut drive.
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  #6  
Old 02-04-2012, 02:03 PM
nfunk nfunk is offline
1998 BMW Z3 2.8L
Location: New Orleans
 
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Mein Auto: 1998 BMW Z3 2.8L
That is exactly what I did! I too had hose clamps fail on me.
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  #7  
Old 02-04-2012, 09:27 PM
brianrparker brianrparker is offline
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Quote:
Originally Posted by nfunk View Post
That is exactly what I did! I too had hose clamps fail on me.
But did you have another car to go buy different ones. Not this guy :P
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  #8  
Old 02-05-2012, 05:50 AM
nfunk nfunk is offline
1998 BMW Z3 2.8L
Location: New Orleans
 
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Mein Auto: 1998 BMW Z3 2.8L
Yes, between my wife and I, we have 2 cars, 1 suv and a 4x4 pickup.
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  #9  
Old 02-05-2012, 08:18 AM
BK85 BK85 is online now
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I have the same problem on my 97 2.8L. I have replace the compression clamp with a wider screw type and the leak persists, just not as much. So can I just by some aftermarket hose or do I have to buy something special from you now who?

Where did you, that changed the hose, get yours?

BK85
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  #10  
Old 02-05-2012, 10:22 AM
brianrparker brianrparker is offline
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Quote:
Originally Posted by nfunk View Post
Yes, between my wife and I, we have 2 cars, 1 suv and a 4x4 pickup.
Oh, Im in the army and the army only allows me to ship 1 car overseas. so only got 1. the BMW not practical at all
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  #11  
Old 02-05-2012, 01:16 PM
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Mpire Mpire is offline
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Mein Auto: S54 M Coupe x2, M52 Z3
The factory hose has the bends built in to avoid hitting things it shouldn't hit, however I don't see why you can't just use any quality hose for it on the low pressure side. (Two hoses going to the reservoir.)
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  #12  
Old 11-14-2013, 07:58 AM
ricratcat ricratcat is online now
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Mein Auto: 1997 Z3 2.8
I haven't had to mess with my power steering fluids until now so I'm sorry if this is a dumb question- when you guys mention ATF, is it truly Automatic Transmission Fluid?! If so, why wouldn't Power Steering fluid work?
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  #13  
Old 11-14-2013, 11:54 AM
AB1945 AB1945 is offline
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Mein Auto: '01 Z3 & '02 325i Wagon
While you are at it - check you do not have a leak at the filler cap for the power steering ATF fluid. The "o" ring is a fairly common failure and will leak a little fluid down the side of the reservoir onto the hose. Over time it will make it look as though the leak is at the hose connection.
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  #14  
Old 01-11-2014, 04:16 PM
ricratcat ricratcat is online now
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I haven't been on here for a while. Thanks for the advice. I'll check it out.

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  #15  
Old 01-11-2014, 05:01 PM
AB1945 AB1945 is offline
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You can replace the O ring with a #129 BN70 O ring. Or it is part #32411128333 and costs about $3 from BMW.
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  #16  
Old 01-14-2014, 01:25 PM
Pima Roadster Pima Roadster is offline
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Mein Auto: 2001 BMW Z3 3.0
After reading here about the o-ring I discovered that the P/S reservoir housing contains a filter! Wonder what the recommended service interval is on this. This is a great idea if it replaced periodically as the P/S fluid does get very dirty with age, much the same as an automatic transmission. In the past, on cars with rack & pinion but no filter, I would do a purge of the P/S fluid as part of the maintenance.
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