There are a few different designs when it comes to oil catch cans. Oil separators are included in this category and are used in line with the PCV system on vehicles equipped with them. The cause of the problem that all cars have to some degree, is called blow by. Blow by occurs when expanding gasses and pressure from combustion work their way past the piston rings and find their way into the crank case, causing a positive pressure. With the movement of the rotating assembly and already having positive pressure in the crankcase, a large amount of oil in the form of vapor is pushed towards the breathers.

In the case of a vehicle with a PCV system, the vapors are directed into the intake tube then into the intake manifold and its runners. This can dilute the fuel, lowering the octane rating and creating a sludge-like film through the entire intake track.

A catch can is designed with baffling on the inside to trap oil and vapor in the bottom side of the reservoir while still allowing the crankcase to breathe freely through a filter that’s on the top side.

An oil separator is placed in line between PCV hoses. It has a mesh screen and filter material that traps the oil and vapor. It also has an easily accessible drain.

To get started installing, run lines from each vent on the LS valve covers which will route up to the catch can that has fittings on either side. The catch can will be mounted somewhere in the engine bay. The catch can will be mounted to the bracket that secures the remote thermostat housing in place. This location allows easy access to the drain on the bottom of the can and gives you a nice path for the lines to follow from the vents.

To make the connections to the catch can you can use a push on fitting. The first line attaches to the driver’s side valve cover vent and routes under the intake manifold and attaches to a Dash 6 fitting on the catch can. The passenger side line attaches to the vent tube, runs along the coolant hose and to the other fitting on the can. A breather attaches to the top of the catch can and is secured with a clamp.

Remember, an oil separator does not have a breather and will be part of the closed PCV system. Any vehicle with a PCV can benefit from an oil separator since the oil vapors will always find their way into the intake.

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27 thoughts on “How To Install An Oil Catch Can”
  1. You can make one with spare exhaust tube from when you did your exhaust. Make some caps, and add barbs, drain, and internal baffle, and external filter if not wanting to go back through the intake like me.

  2. so does one valve cover pull in air off the catch can filter and then circulate back through the baffle from the other side? i cannot find any info on the web about this particular setup other than this video

  3. Don't touch the tb plate or open it if it's electronic, had to relearn the throttle. I found out the hard way lol it was reving at 2000, when I pulled it into snow covered lot and tried to stop the tires kept spinning and I went sliding into my bosses new f250…. you know the aluminum box that costs thousands to fix right!

  4. Here is my 2008 Nissan Sentra oil catch can (2-ports) version configuration. Hope this will give you a clear picture how to apply on your own configuration. Good day. 04m37s ~ 05m04s discolored gasoline sludge and carbon residues safely trapped in engine oil catch can oil catch tank https://www.youtube.com/watch?v=xCfhebKMRbU&t=2s

    Best ways to make your car engine last longer with oil catch can tank

    2008 Sentra engine oil catch can tank and blow-by hose configuration placement maintenance

    Engine oil change 2008 Sentra 2.0 S – DIY drain and fill

    05m12s ~ 05m20s check the engine sound prior to engine oil change

    자동차의 심장 엔진 수명을 늘려서 존버 하는 방법 – 오일캐치캔

    자동차 엔진을 10년 이상 무탈하고 오래 탈 수 있게 관리 하는 법

    불완전 연소되어 찌꺼기가 끼여있는 더러운 잉여 개솔린 휘발유가 다시 엔진 연소실로 되돌아가기 전에 오일캐치탱크에 안전하게 분리된 찐득한 점액성분으로 변색오염된 가솔린 휘발유 – 04분37초 ~ 05분04초 확인

    오염된 상태로 엔진 연소실로 들어가면 결국 엔진 때로 누적 되어 장기적으로는 노킹현상 유발 – 엔진 수명이 짧아집니다. 엔진을 깨끗하게 유지 관리하게 하는 꿀가성비 DIY 부품 – 오일캐치캔 강추 합니다 정기적인 엔진/미션오일 교환은 필수 입니다. 특정 회사 제품 사라는 광고 구입 링크~ 걸어놓은 부분 없습니다.

    2008년도에 첫차로 구입해서 엔진관리 잘하고 13년차 아직까지 무탈하게 잘 타고 있습니다. 5분12초~5분20초대 13년된 엔진소리. 오일캐치캔 / 엔진오일 교환 / 미션오일 교환 모두 내돈내산 DIY 자가정비 경험담 입니다

    수십년 전 우리 부모님 세대는 칫솔질만 하면 치아관리가 다 인 줄 알던 시절이 있었습니다. 그 영향으로 부모님 세대 들은 40~50대 이후부터 심각한 치아관리 부실로 인해서 치과를 찾을 수 밖에 없었죠. 그 마지막은 결국 틀니로 결말을 맺거나 지금은 임플란트로 대체 되었죠. 그러나 이 모든 사단이, '치실'에 대한 공익광고 만 있었다면 어느정도 해결될 사단이었습니다. 제가 어느날 치과에서 이 '치실'에 대한 생각을 털어놓자… 치과 종사자 분이 허탈하게 농담섞인 느낌으로 한마디 하시더군요. "저희는 그럼 뭐 먹고 살아요?" 라구요…..

    5년~10년 마다 자동차를 주기적으로 갈아타시는 분들 한 테는 해당 없는 내용 이겠지만,

    자동차가 한 두푼도 아니고, 오래 타면 그만큼 이득이고, 치과에서 '치실' 과 같이~~

    자동차에서 '오일캐치캔'이 같은 맥락으로 생각되어 공익차원에서 올린 꿀팁글 입니다.

    자동차 엔진오일교환/미션오일교환은 칫솔질 처럼 '그나마' 일반적이고 상식적인 사항입니다. 그러나 오일 캐치캔에 대한 내용은 정비쪽이나 매니아 말고는 잘 알려진 사항이 아닙니다. 왜그럴까요?

    자동차 제조 판매회사 측은 차량 교체주기가 빨라져야 사업이 돌아가는 구조, 즉 자동차가 빨리 고장나야 제조사는 자동차 한대라도 더 팔리니까요. 자동차의 심장은 엔진입니다. 제아무리 이쁘고 간지 작렬하는 자동차가 있다 치더라도, 엔진이 뻗어버리면 어떻게 될까요?

    오일캐치캔은, 자동차 제조 판매회사가 원하는 교체주기가 빠른 판매소비구조에 반하는 정비품목 입니다. 그러나 경제적인 면을 소중히 생각하는 소비자 측에게는 꿀팁이죠.

  5. Why do these sort of videos always have someone whaling on the guitar as the background music, like that chipmunk foosball, and why is that guys jeans so snug, and why is there a carb on that engine? Says the video is from 2019???

  6. Wondering if you can do an episode on separate fuel tank's auxiliary tube installation on mid size commercial truck's. Another episode might bring in a whole new crowd… with extra info, regarding small canister bracket installation guides with tow hinges on SUV's to truck modification's on expeditionary vehicles.

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