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Old 06-30-2020, 09:58 PM   #1
rgrafton
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2002 SC1
Default Changing power steering fluid

Attempted to replace power steering fluid using turkey baster method... I was only able to get 8oz out of the reservoir even starting the car and turning the wheel all the way to the left and checking the reservoir again and turning the wheel all the way to the right. Topped it off with 8oz of fresh Valvoline fully synthetic ATF (ATF+4).

Any idea why I couldn’t get more out?
...
2002 SC1 5 speed 140k miles
1994 SL 5 speed 150k miles on engine (250k+ miles on car, tranny...etc.)
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Old 06-30-2020, 11:25 PM   #2
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Default Re: Changing power steering fluid

I'm confused: Could you not reach to get it all out of the reservoir? Or, did you get it all out but were surprised that was only 8 oz.

I did a quickie measurement of the outside on my '94, and it only came to about 16 oz. That doesn't account for wall thickness or radii, or for required empty space above the fluid. Eight oz. seems reasonable to me.

Hint: having the pump running and turning the wheel will have no effect on the reservoir level once the system has been running a while and all air is purged.
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Old 07-01-2020, 12:04 AM   #3
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Default Re: Changing power steering fluid

I put a Wix 33033 filter in the return line of my power steering reservoir...
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Old 07-01-2020, 07:08 AM   #4
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Default Re: Changing power steering fluid

Quote:
Originally Posted by mattwithcats View Post
I put a Wix 33033 filter in the return line of my power steering reservoir...
Why not use a power steering filter? Cardone and a few other companies make/market them. I have a Cardone on my truck. They're even supposed to be cleanable. I think they come apart with a snap ring.
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2000 SL2 Automatic (back on the road) 17X,XXX miles.
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Old 07-01-2020, 11:04 AM   #5
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Default Re: Changing power steering fluid

Power steering filter is a rock catcher, 200-250 micron...

Wix 33033 is 15 micron...
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2002 Silver SL2, manual, 5th gear swap (.605), 80,000 miles, black badges,
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Old 07-01-2020, 06:40 PM   #6
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Default Re: Changing power steering fluid

Quote:
Originally Posted by mattwithcats View Post
Power steering filter is a rock catcher, 200-250 micron...

Wix 33033 is 15 micron...
15 microns, designed for a completely different fluid, flowing at a much lower temperature. Have you ever cut one open after using it that way?
...
2000 SL2 Automatic (back on the road) 17X,XXX miles.
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Old 07-01-2020, 07:45 PM   #7
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Default Re: Changing power steering fluid

Quote:
Originally Posted by billr View Post
I'm confused: Could you not reach to get it all out of the reservoir? Or, did you get it all out but were surprised that was only 8 oz.

I did a quickie measurement of the outside on my '94, and it only came to about 16 oz. That doesn't account for wall thickness or radii, or for required empty space above the fluid. Eight oz. seems reasonable to me.

Hint: having the pump running and turning the wheel will have no effect on the reservoir level once the system has been running a while and all air is purged.
Good point. I could see more in the back side of the reservoir but I guess my baster was too large to fit back there lol. I guess 16oz makes sense. I didn't realize that back part held 8 more ounces
...
2002 SC1 5 speed 140k miles
1994 SL 5 speed 150k miles on engine (250k+ miles on car, tranny...etc.)
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Old 07-03-2020, 02:31 PM   #8
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Default Re: Changing power steering fluid

It took me 4 or so cycles of reservoir drain/replace to fully replace the old cruddy DEX 3 atf with synthetic Dex 3. Since then, no issues.
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