bump

 

As i read your post..I am looking acroos the desk at a bag of ford o rings. p/n 391533-S100. Oddly.. They come three to a bag.

 

Thanks Al.
That is odd, like the flywheel bolts come in bags of three as well.

 

why is that odd. the crossover is 2 pieces and there is an o ring at the bottom of both "legs" and one where the 2 pieces meet.

 

Ah, that explains it then.(never had one apart to know there was one in the middle)
But does anyone know the size of the rings(local dealership can't get them until Thursday)

 

I got an O ring off my old crossover sitting in front of me. I washed it and it seems to be in good shape. I can mail it to ya if you want

 

I appreciate it. I will take you up on that If I can't get a measurement off of mine.
Thanks.

 

ok dude, just let me know

 

Coolnat Crossover pipe O ring size

I have had the same problem of leaking Crossover tube O rings.
Nobody knows the size of these... so I decided to research it.
The specs are: "Viton Orings #914 Hydraulic SAE BOSS 7/8"
Make sure you get the Viton material. It has the correct Temperature range and does not absorb Coolant, oils or grease. The diameter of the oring is 0.116" - 0.118"

Viton Orings #914 Hydraulic SAE BOSS 7/8" Price for 10 pcs - Orings and More

I have them installed on my 1999 cobra.

The coolant fill cap is a AS 568-015
This was not an easy find