Catch can hoses collapsing

[aarcuda]

So I noticed my catch can hoses are collapsing. they are definitely getting narrower. the hoses are the run of the mill PCV/emissions type hoses (goodyear) and apparently they arent rated for more than 10" of vacuum. I guess we need at least 25" for decel conditions.

So what type of hoses will work?

Gates Fuel Line/PCV/Evaporative Emission Control (EEC) Hose.
For use on automotive applications—fuel lines, EEC and PCV. Nitrile core. Temperature range: -40 °F to 257 °F. Conforms to SAE 30R6 and SAE 30R7 standards. Vacuum rating: 24 IN/Hg for 7/16 IN smaller sizes; 10 IN/Hg for 1/2 IN to 3/4 IN. 50 psi w.p.. Gates suggested not for fuel with 15% MTBE (volume). Do not use on MPI (multi-port injection) fuel, pressure lines. According to Gates, Do not use with MTBE added fuels above 15% concentration. Source: Gates Catalog 31-2020, 2000 ed., pp. A28.

[salvy59]

how do you know that the hoses are collapsing? you have someone revving the engine while you look or feel the hoses?

[aarcuda]

the hoses are no longer round. more oval shape. they look like this with the engine not even running.

[salvy59]

>> the hoses are no longer round. more oval shape


I'm very curious to see how cheap these hoses are. if you take one of the ends off does it have a single core meaning thread like indented inside the rubber or something that looks like a color line say like blue or purple?

[OmahaRumble]

I had the same problem when I used the Speedlogix braided hoses. I switched to these without any problem : Armor Mark/15/32 in. SAE J30R7 PCV and emission hose - Sold by the foot (50291) | Rubber Hose | AutoZone.com

[aarcuda]

was that hose hard to get on? its smaller than 1/2" so the vac rating is probably higher. I see its still a 30R7 specd hose.

[1FST4DR]

Not sure how many miles you have on the hose, but just like any hose,belt etc it will eventually need to be replaced.

[aarcuda]

well thats the thing. it happened pretty quick

Some history:
I had some sort of water hose on mine (came with the moroso can back in 2010). My wifes had the goodyear emissions hose (came with her moroso can from 2012). I bought both cans so they must have changed the type of hose they use. I bought mine in 2010 and hers in 2012.

My hose would show an oily residue on it and youd expect that since it wasnt made for emissions or pcv so I decided to change to the hose that my wife had.

both hoses were collapsing withing 5000 miles. oddly enough, i didnt notice the original water type hose doing this- it just got oily residue on it on humid days

[1FST4DR]

By your description it sounds like you might be using heater hose.. If its a true hose made for petroleum products or equivalent you should at least get 6 months to a yr out of it depending on your driving style,miles,and the elements.

[sitedrifter]

A quality hose should last for years not months.