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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


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Old Sat, Jun-06-2009, 09:11:24 PM   #1
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Default [DIY] Power Steering

Well, I just recently completed the power steering hose DIY.

I had found a couple DIY's and didnt find exactly what I was looking for, so I decided I would make my own. I dont have all the pictures I wish I did, but this is a VERY easy DIY. This is more for part numbers, and my issues with finding the "right" hose for the return line

First off, the return line hose that people make themselves, needs to be oil resistant and high PS.

I originally found 1/2" ID heater hose, and after talking to a couple people it was not oil resistant and did not have the PSI rating to be used for this application. The power steering fluid (ATF) is corrosive and can eat through the hose if you dont use the proper hose.



The hose on the left is the "right" hose to use. It's transmission cooler hose from NAPA with 400psi rating and oil resistant. The hose on the right is heater hose, and you can tell it doesnt have the reinforcements necessary for the PSI rating required.



This is the hose from Napa.

I also purchased a brand new intake manifold hose from the BMW dealer with my BMWCCA discount for $30. This hose is too cheap, NOT to get a brand new one with the PROPER fitting for the power steering pump.

in addition.. make sure you get the 2 new crush washers that go with the intake manifold hose. these go between the banjo fitting, and the bolt. These two washers "should" come with the new hose, but make sure you confirm. They are #3 in the diagram, but dont show up in the part number listing as they came with my hose

Part #1 Intake Manifold part number 32411138419




There is a small fitting in the hose that runs from the hard line on the return line to the reservoir. After talking to a couple people, when you replace the hose with the NAPA hose, it will NOT cause any ill effects and no need to worry.

I removed the two old hoses and then removed the reservoir to clean out the filter contained at the bottom with 1-2 quarts of brand new ATF fluid. I ran the new fluid through the reservoir until the fluid coming out was looking brand new.

I then used brand new hose clamps, and installed the hoses on the reservoir to make it easier to clamp everything together. The transmission hose needs to be cut at 11.5" inches to reach from the reservoir to the return hard line.

Once the reservoir is installed back in the bracket, reattach the hoses to the return line and power steering pump.







Once all the hoses are connected, fill the reservoir with ATF. I used Mobil 1 synthetic ATF. Once filled to a decent level, start the car and rotate the steering rack FULLY from one side to the other a couple times to "bleed" the rack of any air. Once you have completed this, double check the fluid level in the reservoir, and then ENJOY



So you will need these parts.

3-4 quarts of ATF of your choice (1-2 for flushing reservoir, and 1-2 for refilling)
Napa part #H1945 ... 3ft of Transmission Oil Cooling Hose
BMW Part #32411138419
and then the new hose clamps

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Old Sat, Jun-06-2009, 09:23:07 PM   #2
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looks good .......skill level rating?
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Old Sat, Jun-06-2009, 09:27:19 PM   #3
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awesome cal... lookin good.

glad you agreed that the intake hose is worth just replacing.. for that money, it's not worth messing with.
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At any rate, our MDX is running 5w20 and it can tow 3500 pounds.
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Old Sat, Jun-06-2009, 09:28:19 PM   #4
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looks good .......skill level rating?
skill level rating AFTER having the proper info

maybe a 2 out of 10... very easy, just need to plan and get the proper hose
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Old Sat, Jun-06-2009, 09:29:02 PM   #5
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awesome cal... lookin good.

glad you agreed that the intake hose is worth just replacing.. for that money, it's not worth messing with.
thanks Ben.. and thanks for the couple phone calls discussing this...

now it's out for EVERYONE to enjoy and learn from...
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Old Sat, Jun-06-2009, 09:31:12 PM   #6
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thanks Ben.. and thanks for the couple phone calls discussing this...

now it's out for EVERYONE to enjoy and learn from...
any advice i can lend to the master is an honor.
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At any rate, our MDX is running 5w20 and it can tow 3500 pounds.
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Old Sat, Jun-06-2009, 09:32:45 PM   #7
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any advice i can lend to the master is an honor.
haha... why do you think I was calling YOU
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Old Sat, Jun-06-2009, 10:48:18 PM   #8
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I need to do this soon. Just got a brand new reservoir. Just need the hoses and clamps.

Thanks for the heads up
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Old Sat, Jun-06-2009, 10:52:46 PM   #9
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I need to do this soon. Just got a brand new reservoir. Just need the hoses and clamps.

Thanks for the heads up
not a problem... no need on the new reservoir, but good on you for it.. I didnt want to spend another $70 for a reservoir, and the filter cleaned out nicely...

HIGHLY recommend the Napa Transmission Cooler hose and it serves and meets ALL requirements for this fix

They had to order it for me, and took 2 days to get in the store, so make sure you get it all squared away before you want to take it all apart
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Old Sat, Jun-06-2009, 11:16:35 PM   #10
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nice, i guess you decided to go for the DIY's
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Discussing [DIY] Power Steering in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)