oil catch can?
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oil catch can?
http://cgi.ebay.com/ebaymotors/ws/eB...&category=6778
seen lots of these around the track on turbo cars, i get the general idea of it, but can somoene please explain what it does, why, and how? thanks
seen lots of these around the track on turbo cars, i get the general idea of it, but can somoene please explain what it does, why, and how? thanks
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It goes between the crank case breather and the air intake. Basically it just grabs all the oil particles that get blown out of the crank case and keeps them from getting run back through the engine. Useful on forced induction and high compression cars, pretty useless on everything else.
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Originally Posted by Boilermaker1
Basically it just grabs all the oil particles that get blown out of the crank case and keeps them from getting run back through the engine.
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From: Dallas, PA
Rep Power: 607 yeah, what boilermaker said.......i just use a breather filter. A catch can makes it look fancy. Some ppl complain about oil dripping out of the filter.......but i've been boosted for 9 months and i have no drops of oil on my rail.
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Originally Posted by civic01vtec
yeah, what boilermaker said.......i just use a breather filter. A catch can makes it look fancy. Some ppl complain about oil dripping out of the filter.......but i've been boosted for 9 months and i have no drops of oil on my rail.
yeah same here, i dont have a problem with that either.
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I dont know. If you get a breather filter then your cooling the oil slightly, preventing oil from returning into your intake manifold (that cant be good for your engine, and it passes over your TB plate covering it with build up). I say cap the Inake peice and instal a breather filter.
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From: CenTex
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I dont know. If you get a breather filter then your cooling the oil slightly, preventing oil from returning into your intake manifold (that cant be good for your engine, and it passes over your TB plate covering it with build up). I say cap the Inake peice and instal a breather filter.
Re: oil catch can?
there's a DIY on k20a.org for a 20 dollar catch can that seems tried and true.
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I had one of these on my 2002 Stratus. Thing worked very very well. It caught 1/2 a tube of oil per month. Im going to try this on my Civic and see how it works. last time I cleaned the TB it was very dirty. 
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^thats because it's false. our oil system can exceed 80psi at high rpm range. PVC systems provide the motor with most of the idle air, but if you remove it, the computer steps the IAC out a notch to compensate. so really, it's just an emissions thing.
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From: CenTex
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http://www.emhonda.com/forums/cms_vi...icle.php?aid=3
the reason the hose is connected to the intake is because there is a vaccuum created by your motor that will help pull the oil up OVER the rockers and make sure everything is properly lubricated by drawing it across everything. Where as using your oil pump just kind of shoots it up there an hopes your hit everything and letting your cams flings it all around...
Last edited by TransformedBG; May 13, 2007 at 08:14 PM.
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From: Rockville, Maryland
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but the fact that the stock location of the breather hose is BEFORE the throttle plate, the valve cover will never see nearly enough vacuum to actually lift oil up and over the rockers. the oil pump doesnt just 'shoot' oil up there, it's routed to specific areas.
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From: Washington DC
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This is simple fluids.... its gonna take the path of least resistance.... out the hole. There's more pressure in the valve cover than there is outside of it... thus, the pressure differential forces air out of the hole. Its to catch and grab oily vapor and keep it from getting out of the system (emissions). It does not need to be connected to a vac source, you can connect it to a catch can and vent the other end of it, and you're not gonna be moving oil around the valve train because of suction, you'd be sucking it off the valvetrain and towards the hole if that were the case. Its partly fed by the journal ports and the cam is splash lubed as it rotates through the sump of oil underneath it.
The one that has some merit to the vacuum thing is the crank case breather (i.e. the PCV port). Its been proven that a slight vaccum draw on the crank case will relieve a fair bit of resistance in the rotating assembly by drawing the air out.... it keeps the pistons from having to fight air pressure while on the downstroke.
The one that has some merit to the vacuum thing is the crank case breather (i.e. the PCV port). Its been proven that a slight vaccum draw on the crank case will relieve a fair bit of resistance in the rotating assembly by drawing the air out.... it keeps the pistons from having to fight air pressure while on the downstroke.
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I believe it also promotes better ring seal too. I didnt post before Boiler, but there is a lot of misinformation in this thread. Guys, listen to what Boilermaker says in most of his posts, he always does his homework, hehe.
Re: oil catch can?
This is simple fluids.... its gonna take the path of least resistance.... out the hole. There's more pressure in the valve cover than there is outside of it... thus, the pressure differential forces air out of the hole. Its to catch and grab oily vapor and keep it from getting out of the system (emissions). It does not need to be connected to a vac source, you can connect it to a catch can and vent the other end of it, and you're not gonna be moving oil around the valve train because of suction, you'd be sucking it off the valvetrain and towards the hole if that were the case. Its partly fed by the journal ports and the cam is splash lubed as it rotates through the sump of oil underneath it.
The one that has some merit to the vacuum thing is the crank case breather (i.e. the PCV port). Its been proven that a slight vaccum draw on the crank case will relieve a fair bit of resistance in the rotating assembly by drawing the air out.... it keeps the pistons from having to fight air pressure while on the downstroke.
The one that has some merit to the vacuum thing is the crank case breather (i.e. the PCV port). Its been proven that a slight vaccum draw on the crank case will relieve a fair bit of resistance in the rotating assembly by drawing the air out.... it keeps the pistons from having to fight air pressure while on the downstroke.
Supposedly lets say your theory of a vacuum source helps give it a better flow as you would say. If thats the case then that mean all the boosted cars are pushing pressure into the valvetrain which is bad. So that means boosting is bad for your valvetrain... lol
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From: Washington DC
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When you boost the car, you gotta take that hose off and either route it into a pipe before the turbo, or leave it open to vent. You cannot leave that hose connected to any positive pressure source.
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Boiler is spot on in both posts. With it rerouted back into the intake, this always leaves the head pressurized and can cause some stress, strain and faliure over time on a decently boosted car. I used a Moroso atmospheric vent can to help de-pressurize the system.
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