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  #1  
Old 02-14-2002, 02:03 PM
Green1995SVX
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O ring failure - A Speed Sensative thing?

I've begun to notice that the failure of the PS O ring seems to be limited to cars with the speed sensative steering... Just an observation ive made. Has anyone here with the rev sensative steering had their PS pump o ring fail?

-Mike
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  #2  
Old 02-14-2002, 04:49 PM
svxeno
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Re: O ring failure - A Speed Sensative thing?

Quote:
Originally posted by Green1995SVX
I've begun to notice that the failure of the PS O ring seems to be limited to cars with the speed sensative steering... Just an observation ive made. Has anyone here with the rev sensative steering had their PS pump o ring fail?

-Mike
I just replaced mine to resolve an occasional "groan" in the PS system. Mine was intact but quite flat. Less groan but still there.


Randy (92 LS-L) ii
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  #3  
Old 02-15-2002, 04:55 AM
svx_commuter's Avatar
svx_commuter svx_commuter is offline
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I think the o-ring failure is heat related. If the radiator has been plugged with road dirt or the car driven hard then the o-ring will get hard from heat.

The cooling loop for the PS is at the bottom of the radiator. If the engine heat goes up so the PS fluid.

The o-ring will allow air to be pulled into the reservoir but not leak out. The PS pump gets noisy when the air gets sucked in. The noise shows up when the wheel is turned.

It is louder when the weather is colder out because the PS fluid is thicker.
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  #4  
Old 02-15-2002, 07:24 AM
Green1995SVX
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Quote:
Originally posted by svx_commuter
I think the o-ring failure is heat related. If the radiator has been plugged with road dirt or the car driven hard then the o-ring will get hard from heat.

The cooling loop for the PS is at the bottom of the radiator. If the engine heat goes up so the PS fluid.

The o-ring will allow air to be pulled into the reservoir but not leak out. The PS pump gets noisy when the air gets sucked in. The noise shows up when the wheel is turned.

It is louder when the weather is colder out because the PS fluid is thicker.
very interesting and detailed post... thanks. But, has anyone with RPM sensing steering had a problem with their O ring?

-Mike
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Old 02-15-2002, 11:51 AM
sk8ing19
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I too just had mine replaced. I think I payed around $130 for parts and labor.
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  #6  
Old 02-15-2002, 12:22 PM
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svx_commuter svx_commuter is offline
Making tires round, Six now :)
 
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My car is 92 LS-L and the o-ring was bad last winter. I too would like to know if any of the RPM sensitve systems have the problem. Maybe the speed sensing system generates more heat.
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  #7  
Old 02-15-2002, 01:04 PM
Green1995SVX
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Quote:
Originally posted by sk8ing19
I too just had mine replaced. I think I payed around $130 for parts and labor.
Looks like I've got my answer

-Mike
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  #8  
Old 02-16-2002, 02:59 PM
STORMINORMAN STORMINORMAN is offline
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Having just replaced the o-ring, successfully, I appreciate the info. I opine that heat and years of use are the culprits. As far as "RPM sensitive" power steering goes, does this not really mean that as the engine turns faster the power steering pump turns faster? Ergo: higher revs somehow must = less assist? Or is the "speed sensitive" power steering just the addition of the electronic control (via transmission or the computer) of the line output connector?
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