Fuckin with a modern diesel.

[MuntCuffin]

Working on a common rail diesel...changing fuel lines. HP lines from pump to fuel rail, fuel rail return, and rail to injector lines. Seeping/leaking a bit and gets a fuel rail pressure code after sitting a while. Prime 'er up and she fires off.

Inject pressures prob somewhere around 26,000 psi. How do I relieve pressure on this bitch so I can change these lines? It hasn't ran in like 3 or 4 days. Help me not take a finger off and/or get an unwanted subdermal injection of diesel fuel.

done this before, but the truck had been sitting a couple months. And it was a bigger leak that helped relieve a lotta pressure.

 

[1oddtech]

Newer diesel steel fuel lines are one time use only, they are safe to remove after shutting off the engine

 

[87manche]

real long sawzall blade.

 

[MuntCuffin]

Newer diesel steel fuel lines are one time use only, they are safe to remove after shutting off the engine

Yep, got a full set of supply, return, and cyl 2-6 lines in a box ready to go.

Appreciate the info

 

[1oddtech]

What are you working on?

 

[Johnny Longrifle]

They wont have any pressure on them after the engine is shut down. Just get after it.

 

[MuntCuffin]

What are you working on?

Detroit dd13

 

[MuntCuffin]

And 3 lines wrong. 4 work days out. May finish my ring and pinion set up just yet.

 

[[486]]

they aren't normal line nuts like any other injector line?

just loosen the nut and they spit a little bit if anything, pressure gone

 

[MuntCuffin]

they aren't normal line nuts like any other injector line?

just loosen the nut and they spit a little bit if anything, pressure gone

You know how fear mongering labels can be.

 

[M92PV4U]

I removed and reused these.

I can't remember if they were under pressure, but nothing crazy happened when I removed them.

 

[Johnny Longrifle]

You know how fear mongering labels can be.

Definitely don't go fucking around with them with the engine running, or use your dick beaters looking for a leak.

And also, if you're taking off lines that weren't leaking before, just give them a little extra ooomph when reinstalling. I've reused hundreds of them.

I dont even use a torque wrench. I've got a click stop elbow.

 

[Gunwalls_Buckthorne]

They may be 26,000 psi but that’s at like 1/1000 a teaspoon volume.

 

[Clb]

tldr
I am sorry 4u

 

[Mikel]

They may be 26,000 psi but that’s at like 1/1000 a teaspoon volume.

I used to make pressure switches. To test them, we would apply 12-15,000 PSI to test their failure point. People expected a big explosion, but in reality they went pfffft. The oil we used stored very little energy.

 

[MuntCuffin]

They may be 26,000 psi but that’s at like 1/1000 a teaspoon volume.

Its a 13L semi tractor engine. They got some volume in em.

 

[[486]]

bleeding injector lines is the same deal, you just don't stick your tongue on it, or try and tighten the nuts with your fingers rather than the wrench

 

[DirtRoads]

It’s a 13L semi tractor engine. They got some volume in em.

If the engine is off, It’s not the volume of the system, it’s the volume delta from the lines expanding.l under pressure

-not an engineer.