NPG
Well-Known Member
I'd say yes as silicone is porous to oil and fuel unless the inside wall is treated to prevent direct contact with the silicone rubber.
NPG
Well-Known Member
With age, pressure and temperature, the tensile strength of most hose materials start to weaken. Strictly speaking, silicone has excellent oil and fuel resistance properties, in the sense that it does not decompose when in contact with these fluids, even at high temps. The problem is to do with the permeability of the silicone rubber that allows vapour to escape, even when used for coolant hoses.
flat
Well-Known Member
Do
you mean you found the Same kind of oil mist on the original black rubber hoses?if so it may be that something is slightly leaking oil under pressure
you mean you found the Same kind of oil mist on the original black rubber hoses?if so it may be that something is slightly leaking oil under pressure
NPG
Well-Known Member
I have never used silicone hoses, o'rings, bushes, etc. in applications where they can come into contact with oil and fuel compounds. Nitrile rubber (NBR) and Flouroelastomer (FLE) are the materials that perform best under such conditions. Note that, depending on the blend, other terms may be used to describe FLE such as FKM, FMVQ, the brand name Viton or simply Flouro. All of them refer to the same group of synthetic rubber based on fluorocarbons. So, for your type of application, you need to look for silicone hoses that have a high concentration of FLE or any of its derivatives. Perhaps, another user on this forum who have used this type of hose can recommend a brand, based on experience.
berg450
Well-Known Member
Actually it was more like leak and not mist and probably came from the area where it connects to the steel pipe or turbo. And could be found on the bottom of the hoses. In case of the silicons it is different.
