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Old 04-06-2008, 01:05 AM
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Power Steering question

I have a '56 Ford Vicky with a 302, AOD, out of an '86 Mercury. Motor is bone stock, with no modifications, and will probably stay that way..just a nice driver.

It had a Chevy 605 power steering conversion on it when I bought it, and it uses the original Mercury PS pump. Apparantly it does not put out the right amount of pressure for the 605 box, as the relief valve hisses whenever you turn the wheel, even just a little bit. The power steering works, it just relieves all the time.

I understand Heidts has a kit of some sort for this, and I called them about it. They recommended a whole new pump. Do I really need this or can I put a different relief valve in the original pump??

Thank You,

Rick P

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Old 04-06-2008, 08:14 AM
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The output pressure of the ford pump is fine for the 605 box. (Usually a GM pump mated to a Ford rack is when there is too much pressure and you get twitchy steering, not hissing)

Most systems use between 1000 and 1200 PSI output pressure.

Power steering fluid breaks down from heat/aeration and can make a good pump noisy.

You can try flushing the system and changing the power steering fluid out for new, high quality power steering fluid, (not ATF), and sometimes that will get a hissing pump to quiet down, if that doesn't work then a new pump is probably in order.


The problem could be in the coupling from your box to your column as well, sometimes a solid mount like a U joint will transmit vibrations up through the column.

Hope this helps, mikey
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Old 04-06-2008, 08:43 AM
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If that is the PS Conversion Kit I think it is, they (Kit Maker) recommends a SAGINAW pump which was also extensively used by FORD.
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Old 04-07-2008, 12:47 AM
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Thanks guys,

I will check on your suggestions.

How can I tell if it is a Saginaw pump??

Rick
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Old 04-07-2008, 06:07 AM
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If it a GEARHEADS kit-

http://www.ndgearheadscruiserproducts.com/id22.htm

The SAGINAW pump is pictured at the top of the page.

Have you had any other trouble?
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Old 04-10-2008, 11:04 PM
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No other trouble with the steering. I saw the pic you posted, and checked my car, My pump has a plastic tank on it, and it doesn't look quite like the pump in your picture. I don't see a name on it.

So...if I go to NAPA and ask for a Saginaw PS pump for an '86 Merc motor with the stock serpentine fan belts, you think that will solve the hissing??

Rick P
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Old 04-11-2008, 04:01 AM
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You presently have a CII PS pump. Whether the SAGINAW will solve the noise problem is a toss up. FORD PS systems are noisy anyways.

You need to find the recommended operating pressure for the box and then recalibrate the pump relief valve for that application. The pressure reducers you see advertised usually interfere with flow rate.

The mounting braket(s) will be different for the SAGINAW. You will need to find those in a salvage yard on an origionally equipped SAGINAW SBF. Or talk with GEARHEAD CRUISERS to see if they have some type on conversion mounting kit or recommend a donor vehicle.
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Old 04-11-2008, 08:35 PM
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Thank you, I will check it out.

Rick P
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Old 04-14-2008, 08:48 AM
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Gearheads?

Is your box a Gearheads?
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Old 04-16-2008, 11:08 PM
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I don't know

I wish I knew. I got the car this way. All I know is that I was told it has a Chevy 605 steering box.

Is there a way to tell? I would be glad to crawl under and take a look.

Rick P
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Old 04-20-2008, 08:18 AM
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Post some pictures of the box. We may be able to tell if it was made by Gearheads. You say the power steering works but have you driven the car around long enough for everything to heat up? Or have you just started it up, turned the wheel a few times and figured everything feels good?
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Old 04-21-2008, 01:17 AM
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I have owned the car for several years and have put maybe a thousand miles on it. It has always hissed as soon as you turn the wheel a small amount, other than that the PS works fine.

I called Gearheads last week and got no callback. I will try again this week. I put their disc brake kit on the car when I first got it. It works well.

Sorry about pics. I am computer illiterate. I also have not changed out the fluid yet as suggested. We are remodeling the house and time is kinda tight. I will get to that as soon as I have time.

Rick P

PS: I have to learn how to post pics. I am anxious to show my 55 T-bird rat rod. A friend just got it running good for me. RatBird lives!
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