sup guys, i just installed an oil catch can on my integra, and those shitty vac lines that came with it felt very sturdy, but yesterday -2 days after installing it i popped the hood, and those super nice, clear, reinforced lines... have now collapsed.. apparently the heat softens them alot and they loose their structural integrity, i have seen factory vac lines do this before too.. i had a very larger rubber hose on the egr valve to IM before, it never collapsed, but its fugly.. does anyone know a nice hose to use or a particular hose "rating" that does not collapse or try in implode?

 

There are hoses made specificly for the PCV valve. Go to a parts store and ask for some PCV vacuum hose. It'll either be in a package with the PCV valves out front or sold by the foot from a box in the back. Make sure the box says PCV Hose on it. There are also thin, hard vacuum lines for the FPR, MAP sensor, etc that come in a package in the "help" section. I've often wondered how many people have undiagnosed problems from using the squishy hose on the MAP and FPR.

 

BTW i was assuming you meant the PCV hose since you talked about vacuum line and a catch can.

 

yes sorry, pcv, not egr, my mistake.. and thanks, i did not know they had a pcv valve designated hose, but even on my brother's d series we watched the factory hose collapse.. i guess if all else fails i will use what i used before, some 3/8 ID coolant hose. The hose that came with the kit feels sturdy over near the catch can, but near the motor where there is heat exposure, it got soft and collapsed.. but thanks i will look for that this evening.

 

You should probably make sure that the PCV line isn't trying to pull past a major restriction. If some gasses aren't allowed to be pulled through the PCV, the line could easily collapse. Since it keeps happening to you, this might be the problem. You can check the PCV with a vacuum pump to see how much vacuum is required before air starts to come through. However, if the problem is intermittent then you may not be able to tell without the motor at high rpm. One example would be if oil/sludge was being splashed onto the PCV only when at high RPM, clogging it and causing the hose to collapse from the high vacuum.

 

well.. it doesn't keep happening to me, this is the first time, and i know its the crappy hose because its only collapsed near the engine where heat is saturating the hose. The old rubber hose that was on it never collapsed.

 

Just use braided lines...