2007 Peterbilt 379 Fuel Lines

[Bulljammer]

Well the hits just keep on coming! All my fuel lines from the tanks to the engine are old and brittle, I noticed fuel dripping on the exhaust pipe this morning. Peterbilt tells me their are six lines of all different diameters and it's important to keep the lines equal length to keep the tanks equalized. So I'm off to the house to replace the lines.

Anything I need to be aware of or is it pretty straight forward?

Do the lines need to be primed or will the system reprime itself?

[Unilevers]

if you have fuel dripping out the exhaust, there is something wrong with your injectors/cylinder or fuel delivery system. i would be checking that out first.

[Wiseman]

(03-26-2016 )Unilevers Wrote:  if you have fuel dripping out the exhaust, there is something wrong with your injectors/cylinder or fuel delivery system. i would be checking that out first.

He said ON the exhaust. Not OUT of the exhaust. Sorry Unilevers.

[Rawze]

I have heard lots of stories about the newer Petes leaking fuel from the return lines onto the exhaust. The problem is that most people cannot tell it, and they just simply get low fuel mileage. As soon as the fuel hits the piping, it evaporates and there is no evidence it is happening.

[Unilevers]

(03-26-2016 )Wiseman Wrote:  

(03-26-2016 )Unilevers Wrote:  if you have fuel dripping out the exhaust, there is something wrong with your injectors/cylinder or fuel delivery system. i would be checking that out first.

He said ON the exhaust. Not OUT of the exhaust. Sorry Unilevers.

i saw this, my bad:waaaht:

[stevesparts]

Did them on my w900 its pretty ez unless you hit a tight spot. I had to replace mine at the kw dealer in KC. in their parking lot at night :( just get the fittings on the hose good and tight then to the tanks(the hard part for me no room:()
just make sure keep them from rubbing anything(lots of zip ties) or you will be doing it again. its not a fun job but is pretty ez. good luck.

[hhow55]

Probably good idea to replace the block valve's on the supply and return line's , they go bad and leak as well.
I've read the life of fuel line's is 8 year's, so just replace all at the same time.

[Waterloo]

(03-27-2016 )hhow55 Wrote:  Probably good idea to replace the block valve's on the supply and return line's , they go bad and leak as well.
I've read the life of fuel line's is 8 year's, so just replace all at the same time.

Eight years eh? OY! I'm heading up to the dealer tomorrow, I'll look at those lines, eight years on mine... May as well have them replaced as the truck is already in pieces and in the air! I don't know why I didn't even think of those. I am having some other lines replaced for the transmission...

[hhow55]

The article was in landline magazine, by Paul Abelson