Was looking at the tubing from the water seperator and the breather.
Does any one know the inner and outter dia. of these tubes?
Are they made of special plastic to handle the diesel fule and oils?
I'm wanting to extend them to better locations so they don't drip on the undercarrage parts. ???

 

If you mean the breather tube on the earlier trucks (doesn't say in your signature) I beleave it is 5/8 ID.

reread your signature delivery date. I don't think you have to worry about oil drips on the newer trucks. I think they drain back into the engine. Just air goes out the tube. I could be wrong but I think I read that some where.