Inline Power Steering Filter - TCCoA Forums
 
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post #1 of 7 (permalink) Old 05-20-2014, 02:51 PM Thread Starter
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Lightbulb Inline Power Steering Filter

As many of us 3.8 guys know, the power steering whine during the turning of the wheel gets old quickly. Since I'm one of those guys, my approach to solve this would be to drain and refill the fluid, then install the correct sized filter on the return line. These "inline" filters are supposed to use dense media to filter out tiny particles and debris in the fluid, as well as having a magnet that captures metal shavings. I believe the name of the filter manufacturer is Magnafine. Apparently they do similar things for transmission lines as well. Anyways, after leaving the magnetic filter on for a couple of days I'll remove it and clean the filter out, do this a couple more times until it comes back clean, then add a bottle of Ford's friction modifier (intended for LSD rear ends) to aid the lubrication ability of the fluid.

Thoughts? Opinions?

I had the original pump at one point which whined, and my replacement is no different. Doing a GM Saginaw pump swap seems a little too much.

1993 Thunderbird LX. 3.8L with Underdrive Pulleys, Ford Racing Limited-Slip Differential, Intake & Dual Exhaust, and I like to run advanced timing
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post #2 of 7 (permalink) Old 05-21-2014, 08:47 AM
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I have one of those on my list to buy. What I would do is flush out the old fluid and use Mercon V trans fluid. That will help with the noise as well. I don't know about the modifier. My instinct is to say no on that, just use Mercon V.

BTW, you can get that filter online at advance with a pretty decent discount code found on google. Pay online, go pick it up. -> LINK

1994 Thunderbird - 2000 4.2L M5R2 now has 55k

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post #3 of 7 (permalink) Old 05-21-2014, 10:23 AM Thread Starter
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Nice, and good to know that the Mercon V will help. Is the size listed (3/8") correct? And what do you recommend using to flush out the old, and how

1993 Thunderbird LX. 3.8L with Underdrive Pulleys, Ford Racing Limited-Slip Differential, Intake & Dual Exhaust, and I like to run advanced timing
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post #4 of 7 (permalink) Old 05-21-2014, 08:19 PM
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Mercon V is a must in our power steering systems. That cheap universal power steering fluid is garbage.

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post #5 of 7 (permalink) Old 05-23-2014, 09:55 AM Thread Starter
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Okay, so Mercon V it is. I've always thought we were supposed to pour in type F auto trans fluid.

1993 Thunderbird LX. 3.8L with Underdrive Pulleys, Ford Racing Limited-Slip Differential, Intake & Dual Exhaust, and I like to run advanced timing
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post #6 of 7 (permalink) Old 05-23-2014, 01:34 PM
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This is how I flush a P/S system (you will need a second person):

Raise vehicle to get front wheels off the ground.
Disconnect the return hose from the bottom of the P/S reservoir.
Plug the return barb on the reservoir (vac plug works good).
Place open end of return line into empty container.
Fill reservoir with Mercon V.
Start the engine and steer lock to lock steadily while keeping the reservoir full of Mercon V.
Continue until the fluid coming out of the open return line is clean bright red.
Turn off engine.
Replace return line onto reservoir.
Fill with fluid.
Start the engine and turn lock to lock steadily until fluid level is static. (This will work the air out).
Lower car.
Done.

You can keep the car on the ground if you want. It's easier to get to everything if it's up though. YMMV

1994 Thunderbird - 2000 4.2L M5R2 now has 55k

1995 Thunderbird - 2002 Alum 4.6L SVO - Awaiting transplant... (Parts donor)

1996 Cougar - 2004 3.9L 4R70W
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post #7 of 7 (permalink) Old 05-23-2014, 05:38 PM
Rob
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The dreaded whine comes from the way the pumps are designed. I attended an acdelco class on power steering systems. One of their main points was: vacuum
Bleed the ps system and you can have quiet operation of these pumps. They said a lot are returned and wind up testing just fine.

It works great, btw. Problem is that there can be another leak somewhere in the system that allows air to enter when under vacuum.

-Rob
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