Bought a package of ten orifice tubes on ebay. The tubes came in three different colors (orange, red, green). Anyone have any idea why they are color coded?

Thanks,
Klaus Cook
Houston, TX

 

Blue, red and Orange are used in Fords and White and Black are used in GM, not sure about the Green. I used a Red tube in my "89 F150 when I did the change over, I think the color is a code for the size of the orifice.

 

Thanks for the reply.....I guess the best thing to do is to match them up....it is possible that the green could be for the rear A/C.....