O-ring identification help please

[1950StangJump$]

I'm stripping down my 4.6 in my 08 GT in preparation for a forged motor.

There are two hard lines that come out of the power steering pump - both with o-rings. I want to replace them when I reinstall the pump on the new motor, and I have search and searched. Tried some Dorman solutions, but they are different sizes.

Any way to track down a part number? I'm afraid to just use generic o-rings that may or may not handle PS fluid or be a slightly different diameter or thickness.

 

[Juice]

I think your options are: generic orings or new P/S hoses. Sorry.

 

[1950StangJump$]

I think your options are: generic orings or new P/S hoses. Sorry.

thanks. Does The Merc 3/5 we use for PS require a special type of o-ring like fuel would?

 

[Juice]

Not sure , sorry.

 

[Midlife Crises]

Take the O Rings to a hydraulic hose and fitting shop to match them for size. I think you will want a Viton O Ring with a Dura 90 hardness. Almost certain they will be metric.

 

[1950StangJump$]

Thanks.

I'm not sure how the "Dura 90" plays in, according to the below chart, Viton o-rings are excellent for auto transmission fluid.

https://www.marcorubber.com/o-ring-chemical-compatibility-chart.htm

Harbor Freight sells a 180 count assortment for $10.

 

[Midlife Crises]

Most of the average Viton or Buna O Rings are around 60 on the Durameter scale. High pressure hydraulics use harder O Rings rated at 90 or more on Boss fittings and split flanges. It’s just a scale for rating the hardness of polymers.

 

[1950StangJump$]

Most of the average Viton or Buna O Rings are around 60 on the Durameter scale. High pressure hydraulics use harder O Rings rated at 90 or more on Boss fittings and split flanges. It’s just a scale for rating the hardness of polymers.

Thanks. I'll look for a kit like that - little harder to find, it appears

 

[Midlife Crises]

When I worked in a field that required using several different types of O Rings I ordered them all from McMaster Carr.

 

[1950StangJump$]

This kit, meant for divers, has a bunch of sizes and is Viton/90 durometer.

It's not metric, but for $7, I figured I'd see if there are standard equivalents that will work.

https://www.ebay.com/itm/273984177887

 

[Joe combs]

If I remember correctly they are 2 different sizes (from my time as a ford parts person), the numbers if they havent changed are 388898s and 388897s... just pulled my paperwork from doing my 08 GT, and that is the part numbers I used, and they were cheap at the dealership.

 

[1950StangJump$]

If I remember correctly they are 2 different sizes (from my time as a ford parts person), the numbers if they havent changed are 388898s and 388897s... just pulled my paperwork from doing my 08 GT, and that is the part numbers I used, and they were cheap at the dealership.

Thanks! I wish I had seen this before ordering the scuba diving kit

 

[Joe combs]

At ford they were about $1.00 each...and I even think autozone has them too...

 

[1950StangJump$]

If I remember correctly they are 2 different sizes (from my time as a ford parts person), the numbers if they havent changed are 388898s and 388897s... just pulled my paperwork from doing my 08 GT, and that is the part numbers I used, and they were cheap at the dealership.

Unfortunately, those part numbers didn't work. As you can see in this picture, they are way too big. They look like the Dorman o-rings I had originally purchased

 

[1950StangJump$]

So, I just ended up buying a new hose, as a quality aftermarket version was only $21. That satisfied the larger o-ring requirement, since the new hose came with rings.

That smaller one though - it is a small, metal "L" tube that has been discontinued. On ebay and such, it is $50-$60. The o-ring is part #3L2Z3F886BA. That's probably the way I'll go there. Unfortunately, the cheapest I've found is nearly $12.

Is what it is.

 

[Joe combs]

Those are the lines at the rack... your original post said for the power steering pump, the part # I gave you is for the hard line at the pump.

 

[1950StangJump$]

Okay. But, I'll take the blame for a bad description.

But, there is only one screw-in, NPT type fitting at the pump that would need an o-ring; the other on the pump is the hose/clamp fitting.

So, that would explain one of the part numbers you listed. What was the other?