2016 Ram 3500 6.7 power steering hoses

[smittyd174]

Does anyone know for sure if a 2016 Ram with the 6.7 Cummins power steering lines still have plastic liners in them . Can't find an answer hoping someone may have replaced the pressure lines and would know.

 

[Signal73]

An 11 i work on did, it separated and made the air leak sound. Pulled the loose liner out and the noise went away. Lots of folks have done this with no further problems.

 

[NonFord]

it was in my 2016 all broken up, the new one looks to be different...

 

[smittyd174]

it was in my 2016 all broken up, the new one looks to be different...

Thanks for replying , which line did you replace.

 

[NonFord]

The high pressure one...

 

[smittyd174]

Does anyone know for sure if a 2016 Ram with the 6.7 Cummins power steering lines still have plastic liners in them . Can't find an answer hoping someone may have replaced the pressure lines and would know.

Well today the 2 pressure hoses got changed. A little akward but got ur done. After the truck was done , running and no leaks and no damn whine , I cut the hoses apart and inside one of the hoses was a plastic tube about 12-14 inchs long and it fell out. Not sure why its there and don't care. I can hear the frying pans rattling now.Lol.

 

[Bluy117]

Well today the 2 pressure hoses got changed. A little akward but got ur done. After the truck was done , running and no leaks and no damn whine , I cut the hoses apart and inside one of the hoses was a plastic tube about 12-14 inchs long and it fell out. Not sure why its there and don't care. I can hear the frying pans rattling now.Lol.

Hi - which hose had the plastic liner? the hose from the PS pump to hydroboost or hydroboost to the steering gear box?

 

[Topzide]

@smittyd174, I bet that plastic liner was in the suction hose to prevent it from collapsing. That way the pump wouldn't starve for fluid and burn up. Hey, your truck, your choice! Hope that the problem has been solved with the hose change out.

 

[Jim W]

I spent over 40 years on and off designing hydraulic systems for a large earthmoving corporation. With 10 of those years concentrating on hydraulic hose design and use on machines. So, that is my background.

Now almost all hose assemblies have a liner incorporated into the hose as the hose is made, I.E., plastic to most folks. The Liner is required for several reasons, one is to prevent the wrappings of the hose from contaminating the fluid. Another is to allow for a smooth laminar flow of the fluid. A third is to allow support of the material used to wrap the hose as it is made and cured. Another is to prevent the hose material in the outer cover from disintegrating due to the fluid that is being transported internally by the hose. Not all fluids are compatible with the outer cover or the inner fibers of a hose assembly.

I am only guessing on as to why the liner has failed in some hose assemblies and not others in the same application. As this issue has been around for some time mainly on the 6.7L engine-built trucks. As early as the 2007.5 trucks have reported the same issue of the inner liner failing. My theory is poor manufacturing practicing in the assembly of the hose as the couplings are inserted into the hose to male up a completed hose assembly. As the coupling is inserted into the hose this is either cutting the liner or pushing the liner into the hose, thus allowing a failure over time. Since I have not seen a failed hose assembly I can only guess at the mode of failure.

BTW, I have a 2008 truck with over 145,000 miles with no hose failure.

Just my $0.02 on the matter.

 

[endoscott]

Those computational fluid dynamic engineers are not stoopid! I mean "lots of folks have done this with no further problems"? No further problems for how many miles? Is it that much more expensive to replace with MOPAR replacement hose? Just asking, I don't have a dog in this fight. I have just done a lot of stoopid things myself and want to avoid those "easily avoidable" problems.