Power Steering Hose O-Rings

[k20]

Does anyone know what size O-rings are on the power steering hoses? Im converting my truck to hydroboost and the o-rings on all of the hoses are a little ragged, so I would like to swap em. If anyone knows the size, or perhaps a p/n for a kit from napa or autozone, Id appreciate it. Its an 85 steering box/lines/hydroboost

 

[BGKYK5]

You could measure them and try to match them up with what they have on McMaster. I'm not sure, but I assume they are viton. Just search on o-rings.

 

[dyeager535]

Call around to hydraulic places and what not, ask if they sell o-rings. Walk in there with the fitting and old o-rings, they should be able to hook you up. Found my GM Saginaw fuel line o-rings (probably same piece) that way, and a lot cheaper than through GM, which is another option.

 

[bigblock72]

Try Car Quest PSH 34951 or 34952 or kit number 34958. NAPA NPS 72587 or 72588 or kit number 72584

 

[rcamacho]

Here's a nice reference for NAPA PS o-rings:
http://www.dmauto.com/web/dmauto/Catalog/NAPA_ECAT/mfg/NPS/
Note, 72584 is $100

 

[dyeager535]

That better come with about a billion o-rings! I had to check myself, that sounded too ridiculous. Hydraulic place charged me like $.15 each when I bought mine.

 

[rcamacho]

I had the same issue with an o-ring letting go recently. ACE hardware had a suitable replacement. It was still a bear to bleed my PS cooler but at least possible now that the return hose is not sucking air.

 

[dyeager535]

Only thing I'd be concerned with is if they will hold up under the heat, pressure, and fluid.

Probably not an issue for PS, but I know the ones for the fuel injection side need to be say they are compatible with fuels, or they melt over time.

 

[BGKYK5]

From McMaster-Carr:



IIRC fuel injector o-rings are made of Viton. They are a pretty safe bet with most automotive fluids. But you can't go wrong with Teflon (PTFE) o-rings if you can find them.