I have a 98 BMW 740i and no self leveling.
The power steering fluid gets low lately. My local mechanic showed me the
rubber hose below the power steering reservoir looked wet. He said all BMW
power steering leak - common problem for all models.
He need to replace with a hose kit sometime in the future and its extensive
labor work, cost over $600.
First, any 98 740i owner out there can tell me exactly what kind of power
steering fluid should I use? Please tell me where is the offical URL link?
Is that anyway I can do this hose or seal replacement for less?
On alot of BMW, not just the 7s, your problem may just be a leaky hose
clamp. BMW uses those cheap-ass crimp clamps that eventually leak.
Replace with a regular worm-drive clamp.
As for fluid, the cap on your p/s reservior should specific the exact
fluid you need. If you don't have self leveling, it may just be regular
ATF fluid. Check it out and make sure you use the correct fluid
OK, it has "ATF OIL ONLY" marked on the top of the cap. So what kind of ATF
oil specifically suitable?
The black rubber hose is around 3/4" in diameter.
I cannot find anyway to open the steel clamp?
This black rubber hose connects from the bottom of the Power Steering
Reservoir to some kind of radiator block.
There are two clamps, one at the bottom of the reservoir, another clamp at
the middle of the hose, connecting nothing (why?).
Where are the seal, or kit my mechanic wants to charge me for $600?
I've been down this road with the power steering hoses on my 318is. After
spending $100 buying a new set of hoses I found during the installation that
there was really nothing wrong with the old ones - just the crimpon hose
clamps that had lost their preload as the rubber relaxed with age. You can
buy a tool to recrimp these hose clamps at most auto supply outlets. Or you
can replace the hose clamps with the screw type. The old ones can be
removed by prying them open with a small screwdriver inserted into the crimp
section to open them up and then cutting them off with a macho set of
You can dismount the reservoir so that you can move it to a more accessable
position within the constraints of the attached hoses. In my 318i I also
removed the air cleaner and airflow meter to improve the access but I'm not
familiar with the component locations in the 740i. You should suck as much
fluid as possible out of the reservoir using a turkey baster to reduce the
possibility of a major spill. You don't actually have to disconnect the
hoses to replace the clamps but it may happen by accident while removing the
OK, if you look at the crimp clamps, you should be able to see that it
overlaps itself as it goes around the hose. You can get a very tiny
small screwdriver and pry the overlapped portion of the clamp away from
the band. Once you figure it out, you can do it by hand without looking.
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