Rigidity?
Why oh why does the PS hi pressure hose have a
- Thread starter sfdon
- Start date
Rigidity?
There is a reducer a few inches long in the middle of the hose where the crimped fitting is. Could that be causing it?? Same hose through pre 82, 5 & 6 series.
Wow- great info. Thank you Bert!
So increase pressure/decrease volume?
Later models used same hose with higher bar PS pump or lost restrictor?
Later models used same hose with higher bar PS pump or lost restrictor?
Well, the Porsche 928's have an almost identical metal reducer in the power steering hose. In that community, it is believed it functions as a 'muffler' to quiet the sound of the hydraulic fluid flowing through the hose.
PS: I clearly understand the 'doubters' below, and as I said above, it is 'believed'. A couple of guys have cut their old hoses up, and their was a spring located in that area (tapered/conical in design as I recall). It may be for turbulence reduction. Someone who has insight from German hydraulic engineers of the '70's and '80's could probably get the most accurate answer!!
Gary
PS: I clearly understand the 'doubters' below, and as I said above, it is 'believed'. A couple of guys have cut their old hoses up, and their was a spring located in that area (tapered/conical in design as I recall). It may be for turbulence reduction. Someone who has insight from German hydraulic engineers of the '70's and '80's could probably get the most accurate answer!!
Gary
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Mike Goble
Well-Known Member
You can tell you're a classic when you've got a kink in your hose...
Sure, my neighbors keep complaining they cannot sleep because of my power steering hydraulic noises... They are nuts, the P-community and my neighbors, all nuts.
With the benefit of ignorance I claim it is a stent. Stents on the inside of an artery are there to keep it open, stents on the outside are obviously to keep it from opening...
With the benefit of ignorance I claim it is a stent. Stents on the inside of an artery are there to keep it open, stents on the outside are obviously to keep it from opening...
[QUOTE="as a 'muffler' to quiet the sound of the hydraulic fluid flowing through the hose.[/QUOTE]
I doubt it !! If there is no air in the line there shouldn’t be any noise . And if there is air in the line it will soon surface in the reservoir as long as there is enough fluid in the system!
My best guess (and only a guess) is that to restrict or keep the hose from bloating, flexing, or kinking. As the pressure inside increase the hose may want to move a bit. Sectioning it in two make it more rigid.
I doubt it !! If there is no air in the line there shouldn’t be any noise . And if there is air in the line it will soon surface in the reservoir as long as there is enough fluid in the system!
My best guess (and only a guess) is that to restrict or keep the hose from bloating, flexing, or kinking. As the pressure inside increase the hose may want to move a bit. Sectioning it in two make it more rigid.
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I believe this , for the most, part a correct answer. The "restrictor" has a different size opening at each end and with the small end towards the steering box would increase pressure and decrease volume. The only problem I am having with this is that I opened up the hose so long ago I can't remember which end of the restrictor went to the steering box
I am about to open one up soon. Once the end parts arrive I will remake a set and post the photos.
We cut open the hose and remove the inner piece (restrictor )!Ok, Here are three photos from top, left and right side. It appears it is same size from both sides ...
Belgiumbarry
Well-Known Member
strange... and a restrictor ? yes, but wouldn't have the end pieces the same effect ? if we consider/assume the hose dia to big ??
I found mine and you are correct same opening at either side but smaller than the ID of the hose. When I went to get mine rebuilt with new hose and using the existing ends, the shop said they couldn't do it as they didn't have a die that would crimp the restrictor in place.So, needless to say, out went another C note.
Cheers!