Why Would This Occur? Oil Permeating Through PCV Hose

[patrickt]

She came out of her hermetically sealed bag today after six months of sleeping. Nothing unusual except the outside of the PCV hose was covered in oil droplets. This exact same thing happened last year, so I was curious to see if it happened again. Now the desiccant in the bag keeps the air quite dry inside the bag, and sometimes the temps get chilly inside the garage. The hose was dry as a bone when I zipped her up six months ago. Why would this occur?

[FWB]

thats weird....does the hose actually say its fuel or oil rated?

i guess by your post all year in the driving season it doesn't do that?

is it all oil or is there some water there? it looks waterish......

[A98Coupe]

That sure does look like water droplets. Oil would not sit in droplet form on the hose because oil has no surface tension - unlike water. Also, judging by the red/brown colour of the steel AN plug in the inlet manifold, I would say that you have had some condensation at some stage during the winter. What kind of storage system are you using - Carcoon or similar? Does it have a good circulation of air? If not, I would forget the plastic bag and use a decent cotton sheet which will allow the air to circulate freely.

[patrickt]

I know it looks watery, but it's pure oil. I wiped it with a clean white paper, tasted it, smelled it, and felt it. It is absolutely oil. And there wasn't a sign of moisture anywhere else, and I inspected her from nose to toes.

[patrickt]

... and the rusty spots on my engine all come from the driving season. Inside the bag with the desiccant I don't even get a spot of surface rust on the rotors.

[vector1]

i had a pcv hose on the 351 do the same thing, looked the same. don't know if it was rated correctly, probably just some coolant hose i had handy.

[ERA Chas]

I used 3/8" fuel hose and had no oil (OR water) condensation. It may be permeating that particular type of hose. Try to replace with an oil hose like for transmission fluid coolers.

[patrickt]

Originally Posted by vector1

i had a pcv hose on the 351 do the same thing, looked the same. don't know if it was rated correctly, probably just some coolant hose i had handy.

Originally Posted by ERA Chas

I used 3/8" fuel hose and had no oil (OR water) condensation. It may be permeating that particular type of hose. Try to replace with an oil hose like for transmission fluid coolers.

Yes, I believe this is just "basement hose." Meaning, it's a no-name, no-rating type black hose that you find in an old box of auto parts in your basement.

[ERA Chas]

Originally Posted by patrickt

Yes, I believe this is just "basement hose." Meaning, it's a no-name, no-rating type black hose that you find in an old box of auto parts in your basement.

Is this the same guy that has a $200 bore scope and million expensive scan /test /analyze baubles??

[olddog]

I suspect the hose is degrading and the oily substance is coming from the material the hose is made from, possibly from the environment created by the bag and desiccant.

If so, there are some nasty cancer causing chemicals in the oil that you let soak into your skin. You may want to wear latex gloves, when handling mister happy, for a few weeks.

[patrickt]

Originally Posted by ERA Chas

Is this the same guy that has a $200 bore scope and million expensive scan /test /analyze baubles??

Uhhhhh, maybe. I guess what happens is that the rubber becomes saturated with oil, and then maybe the temperature drops, the rubber contracts, thus forcing small droplets of oil out to the surface.

[patrickt]

Originally Posted by olddog

I You may want to wear latex gloves, when handling mister happy, for a few weeks.

Hmmmmm.... I'm thinking over the possibilities.

[olddog]

I have seen rubber coated rolls experience a type of chemical reaction and a similar liquid show up on the surface.

The heat and air movement when the car is in use most likely allows it to dissipate as fast as it shows up. When you seal it all up for 6 months it allows it to accumulate. Although it is also possible that there is some chemical reaction going on with something due to the bag.

Seriously I would not get any more on my skin.

[scottj]

Effusion... normal when using rubber hose with oil or gasoline. It's the same thing that's occurring when people smell gasoline in the garage and it turns out to be coming from the hoses.

[ERA Chas]

Originally Posted by patrickt

Uhhhhh, maybe. I guess what happens is that the rubber becomes saturated with oil, and then maybe the temperature drops, the rubber contracts, thus forcing small droplets of oil out to the surface.

'Basement hose'-this is right up there with your advocacy of screen-door spring for a clutch return for some poor guy....
And I ain't touchin' (pun intended) olddog's advice about genital hygiene...

[patrickt]

Originally Posted by ERA Chas

'Basement hose'-this is right up there with your advocacy of screen-door spring for a clutch return for some poor guy....
And I ain't touchin' (pun intended) olddog's advice about genital hygiene...

Basement hose, screen door springs... yessirreee, the finest advice money can buy.

[RodKnock]

Originally Posted by patrickt

Yes, I believe this is just "basement hose." Meaning, it's a no-name, no-rating type black hose that you find in an old box of auto parts in your basement.

Then what is the point of this thread?

Chas is right. Just another opportunity to boost your post count.

[Rick Parker]

Is it an Emissions rated hose? That is what is required for that application. But you knew that right?

[patrickt]

Originally Posted by Rick Parker

Is it an Emissions rated hose? That is what is required for that application. But you knew that right?

Well, perhaps if I were taking a quiz. I just found it curious that a bone dry hose would leech oil through it when parked for a few months. I suppose it's doing that all the time and the air just blows it off.

[patrickt]

Well, I pulled it off and it turns out it's Gates® Adapta Flex™ General Purpose Hose -- the spec sheet on it says that it has "RMA (Class C) limited oil resistance." So, la di da... I'll upgrade it to emissions quality stuff.