I am posting this more as an FYI for those who may be searching in the future.

[venom42]

I was planning to replace the speedo gear o-ring and change the oil in my transmission at the same time. The dilemma was that I did not know what size the o-ring was, and once I was to that point in the job, I would not be able to drive the car anywhere to get a new one. On a friend's advice (he is a Nissan Tech) I purchased one of those "o-ring assortment" packs at Autozone, and was going to use the largest one in the pack. As it turns out, the largest o-ring in the assortment pack is quite a bit smaller than the actual one that goes on the speedo gear assy. Nevertheless, it did fit in place without breaking or anything. However, due to the fact that it is stretched much thinner than it should be it does not seal the assembly properly. With my fresh gear oil and new (still leaking) speedometer cable seal, I headed to Home Depot with the old o-ring in hand. Now that you have suffered through this boringly long post (I just had to tell my sob story to someone ), here is the useful bit of info:

In the faucet section at Home Depot (or Lowes or wherever similar) there is a fantastic little selection of all sizes and shapes of o-rings. The one that matches the speedo assy. seal is a #17 o-ring, and it costs less than a quarter.

Anyhow, I hope someone will find this useful in the future. May it spare you my aggrivation.:stupid:

[Fun_in_my_z]

Sounds like a good idea. Ill have to check into that. To bad the depot doesnt seel head gaskets .

[venom42]

You would be surprised what you can find at hardware stores. Of course if you were to ask for it by what you know it as they would just look at you with a blank stare (trust me). Lowes has all of the interior body clips and fasteners, along with alot of other autmotive type fasteners and whatnot (even copper crush-washers!)in their hardware section. They are CRAZY cheaper than at the parts store too. You just have to look through the droors because they are not called what you (I) would think they are from seeing them at the parts place.

[Fun_in_my_z]

dad got a filter once in a emergency. It was somkinda plubing filter i cant recall exactly. He put it on his truck as a fuel filter. Drove it that way for 6 years.

[frank13]

The "O" ring you bought venom42 might fit and seems like it does the trick, but it in fact does not fit the bill for the apllication of "motor oil". It is not made with the proper chemical compostion to keep from being eaten by the oil it is bathed in. Oil eats rubber! Unless it was produce to fit in some application were said o ring was used in petrolum of some kind, maybe. Such product cost more than just on o ring to seal water. :devious:

[venom42]

Hmm. Duly noted. I have used these o-rings for various things on the Talon, but now that I think about it none of them are really in contact with oil (tb shaft seals, etc). Well damn. Guess I will have to see if Autozone has one or something. So much for that tidbit.

[frank13]

sorry dude. That's why radiator hoses get all soft and mushy when theres an oil leak in close proximity to them. They are not made for oil, only coolant/water. :devious:

[sblake01]

They have to be made of neoprene to be fuel and oil resistant. Not 'buna' or 'nitrile'.

'Your helpful hardware man'

[260Zed]

Originally posted by sblake01

They have to be made of neoprene to be fuel and oil resistant. Not 'buna' or 'nitrile'.

'Your helpful hardware man'

Actually Nitrile is a better material to use with petroleum (Gas) and petroleum based fluids than neoprene. A sort of good - better relationship.

FWIW

[Bambikiller240]

Check out the ENGINEERING FUNDAMENTALS Website for a Compatability Guide where you can select either a O-Ring Material or a Chemical to find out what is compatible with what. There may be some surprises to be found for some folks!

NOTE: There seems to be a limited access time to the site before they ask you to pay for access, so look fast and make notes for future reference.