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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 Fri, Jan-25-2019, 03:26:28 AM   #1
Frost12850
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Default Power Steering Flow Restrictor

Hey guys-

So I’m doing a power steering cleanup (reservoir, and the two lines from the reservoir). The lines I had on the car were oem but the return line didn’t have the restrictor in it. Has anyone else experienced this? Is it possible to obtain this little piece separate from buying a whole new line?
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Old Fri, Jan-25-2019, 12:37:50 PM   #2
bluptgm3
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Default Re: Power Steering Flow Restrictor

Did the return line have a crimp clamp 6 - 8 inches away from the end of the line that attaches to the reservoir?
The restriction is not intended as ‘optional’ and not purchased separately.
I have experienced a return line that had the intermediate clamp but the restriction was ‘loose and floating’ in the hose.


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Old Fri, Jan-25-2019, 12:40:52 PM   #3
Frost12850
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Default Re: Power Steering Flow Restrictor

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Originally Posted by bluptgm3 View Post
Did the return line have a crimp clamp 6 - 8 inches away from the end of the line that attaches to the reservoir?
The restriction is not intended as ‘optional’ and not purchased separately.
I have experienced a return line that had the intermediate clamp but the restriction was ‘loose and floating’ in the hose.


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No it did not. And I cut the hoses wide open and found nothing. I have a early production ‘96 and through research believe I may have a car that never had one in the first place? I kinda want to put one in there now though. Maybe I’ll see if I can rip one from a junk yard car. Unless anyone on here is doing a power steering refresh themselves and had an old hose with one in it I can have.
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Old Fri, Jan-25-2019, 05:49:06 PM   #4
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Default Re: Power Steering Flow Restrictor

If you knew the outer diameter and inner hole, you could probably make or adapt a restrictor.
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Old Fri, Jan-25-2019, 07:10:54 PM   #5
bluptgm3
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Default Power Steering Flow Restrictor

True Value/Ace seems to have a good selection of odd hardware.
Possibly, you could find a bushing or cable ferrule same diameter or close to hose ID …I think something in plastic would work. Add a crimp or hose clamp just down stream to retain it.


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Old Fri, Jan-25-2019, 07:29:18 PM   #6
Braymond141
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Default Re: Power Steering Flow Restrictor

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Originally Posted by Frost12850 View Post
No it did not. And I cut the hoses wide open and found nothing. I have a early production ‘96 and through research believe I may have a car that never had one in the first place? I kinda want to put one in there now though. Maybe I’ll see if I can rip one from a junk yard car. Unless anyone on here is doing a power steering refresh themselves and had an old hose with one in it I can have.
Your 96 absolutely had one.
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Old Fri, Jan-25-2019, 08:37:45 PM   #7
Frost12850
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Default Re: Power Steering Flow Restrictor

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Your 96 absolutely had one.
I looked in the hose and it wasn’t there haha. No clamp on the hose midway either. It’s not possible that it got sucked into the reservoir is it?
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Old Fri, Jan-25-2019, 09:06:57 PM   #8
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Default Re: Power Steering Flow Restrictor

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Originally Posted by Frost12850 View Post
I looked in the hose and it wasn’t there haha. No clamp on the hose midway either. It’s not possible that it got sucked into the reservoir is it?
I'll review the photos of my 96 later. I'm sure I have a view of the hose in question.
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Old Fri, Jan-25-2019, 09:23:22 PM   #9
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Default Re: Power Steering Flow Restrictor

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Originally Posted by Frost12850 View Post
I looked in the hose and it wasn’t there haha. No clamp on the hose midway either. It’s not possible that it got sucked into the reservoir is it?
No. Maybe a previous owner who did not know better replaced your leaking stick hose with a section of aftermarket hose and left out the flow restrictor.
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Old Fri, Jan-25-2019, 09:33:53 PM   #10
Frost12850
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Default Re: Power Steering Flow Restrictor

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Originally Posted by pbonsalb View Post
No. Maybe a previous owner who did not know better replaced your leaking stick hose with a section of aftermarket hose and left out the flow restrictor.
I thought that may have been a possibility too. The return hose had the original clamp on it though to the trombone (not a worm clamp).
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Discussing Power Steering Flow Restrictor 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)