power steering leak - o-ring clarification!

[rail king]

so i have search extensively on this to find a proper sizing of the power steering o-rings that typically cause the pump to leak on most 1g/2g dsm's ... but i have come up empty handed. so im asking the peanut gallery

the point of this thread would be to not only help me find the $1 o-rings needed but also be a guide for others in the future to use instead of paying $30+ from the dealership or worse.

so the basic info ... we all know the seal kit from the dealership is MR244546.

i stole this picture (below) from another thread and it was mentioned that the 2 o-rings are p10a and p12 (which is a metric o-ring?). i have looked at many kits and asked my speed shop and they are not familiar with this measurement of o-rings.

can anyone shed some light onto this and provide an SAE or Metric o-ring size to replace the 2 upper o-rings on the ps pump???

 

[92AWDHX40]

did you try a dealer?

 

[rail king]

yep ... i had them do a stock check on the MR24546. not in stock (1-3 weeks away) and $35.

it may just be me, but i dont feel like paying $35 for 2-3 o-rings that i could probably buy for about $2.... but thats just me. thats why im posting this thread to have people clarify what SAE or Metric o-ring would work. fyi you can buy a 300 piece assorted o-ring kit for like $10

 

[nuclearr]

I got a unversal o-ring kit from advace auto or autozone it had like 20 differnt o-ring it had two that fit the p/s pump. Not sure how long they will last but noproblems yet.

 

[Mr Peepers]

I used a 10mm and 12mm O-ring from the local parts store; can't remember the thickness though.

 

[sjdjinferno]

this is the set i used worked out fine

- Harbor Freight Tools - Quality Tools at the Lowest Prices

 

[DSMified92]

i have a hunge o-ring kit and i used two from out of it i can git 2 more and git the measurements and the thickness with a fila gauge. ive used them on my n/a 2.0 1g and 91 awd and my buddies 91 fwd turbo.....not a problem yet.

 

[fwdmaster]

I used a lock washer from home depot for 8 cents and it works fine

 

[rail king]

thanks for the postings. ill be heading to my speed shop to pillage their o-ring kit of 10 and 12mm rings.

 

[bluejoker12]

I'm just curious if the leak went on long enough would it fry my alternator ### it just so happens to be located right underneath the p/s. Hopefully the two O rings and a new crush washer will make it go away before my brand new alt gets fryd.Thanks for the info everyone.

 

[redyute1]

You bet it will, leaking p/s fluid into the alternator will definately fry it.

 

[burkgonzo]

Yea i think my alt just fryed! Same issue

 

[Calan]

For future reference;

The factory manual specifies that the O-ring marked "P10A" should be 11mm ID x 1.9mm thick (.43 x .0748 in.), and the one marked "P12" should be 13mm ID x 1.9mm thick (.51 x .0748 in.)

The two on the other side of the flow control valve inside the pump are 17.8mm x 2.4mm (.70 x .0945 in.) and 13.5mm x 1.5mm (.53 x .0590 in.)

************

I have written a tech article on pump rebuilding that includes the o-ring sizes and much more...it can be found here.

 

[Jarnutt]

I bought the plastic package of assorted A/C system O rings from autozone and it had 2 sizes that fit almost perfectly, sealed mine up about 600 miles ago, no leaks yet

 

[corsair231]

I'm just curious if the leak went on long enough would it fry my alternator ### it just so happens to be located right underneath the p/s. Hopefully the two O rings and a new crush washer will make it go away before my brand new alt gets fryd.Thanks for the info everyone.

It most definitly will damage the alternator. I had to replace mine because of that. I did some searching on here and found out that the o-rings gave problems on the pump. I replaced them when I did the alternator and thought that all was good. Drove it a couple of days and my new alternator was wet. Found out that my leak was not coming from the o-rings at all. My hose was leaking and the fluid was running down the inside of the overwrap and dropping on the alternator, so check your hoses too.