oil catch can

[boroEF]

so i made my own oil catch can. my car is getting more and more ghetto as we speak. anyway, my question is: for oil catch cans, is there some sort of pressure release valve on it? because mine is simply a can that is able to sustain high engine temperature with a hose going to it from the pvc vavle. It is air tight and none of the pressure has anywhere to go cept into the can(which is quite big). i'm assuming that i need to some how vent the pressure, someone correct me of i'm wrong

[DerekDorifto]

Just punch a hole in the top of the can with a screwdriver for a vent. If you want to get fancy, weld a bung and put a crankcase breather or run hose to vent the fumes somewhere underneath your car.

[bondobondo]

guy,

your oil catch can NEEDS A VENT what goes in must come out, and if you like your gaskets you will revert back to stock until you figure this out.

if you punch a hole in the top of it, it will vent all into your engine compartment, and it will stink up the car if you turn your vents on. run a hose into it, and then run a hose out (preferably larger than whats going in) and it will be all good. run that house going out into the fender well, and it will vent outside of the car, so no stink for you.

[boroEF]

ai ya i didnt know that if it was vented inside the engine bay via a breather it would stink up if i used my vents.
that's disgustttttinggg. must figure out a way to remodify this thing. if anyone saw my oil catch can they'd laugh. it's like...flourescent yellow! it's the smallest super soaker water tank i could find. and then there is a lien going into it. and i did derek's idea...just drilled a hole to vent it out. but doh it stinks things up..

[Flashmn]

Umm, you should have the PVC hose connected to your intake, because otherwise the contaminants that get sucked out of the engine when you're running with the vacume the intake is creating wont be sucked out, cuz you have no suction to pull the "dirty gasses" out of the cam-case. So you'll contaminate your oil ultra fast.

[4A-FTE]

Originally Posted by Flashmn

Umm, you should have the PVC hose connected to your intake, because otherwise the contaminants that get sucked out of the engine when you're running with the vacume the intake is creating wont be sucked out, cuz you have no suction to pull the "dirty gasses" out of the cam-case. So you'll contaminate your oil ultra fast.

Ummmm. no. Under NA conditions, you can run a breather, which is ilegal by the way to vent the gases built up under pressure in your valve cover. If you detach the intake hose from your valve, you won't notice any difference in oil break down. An added bonus, is that you will not be sucking all that oil, and gas back into your intake, and burning it as well. Better emissions too.

Now for cars under boost, the pressure under your valve cover is enough to thrash oil through your cover bolts and through your vlave gaskets too. For those kids, you have to run a breather with a catch can cause under boost, that baby spews oil like there is no tomorrow!

[Tony the Tiger]

Are some of you getting confused with the concept of oil catch cans? I hear the word "pressure", "venting", etc...

A catch can is suppposed to have a hose going into the catch can and out... The hose from the PCV valve goes into the catch can, and then a hose from the catch can goes back into the intake manifold. It's supposed to let the denser oil vapours settle and the can "catches" the oil from the vapours and return clean air back into the engine.

This catch can needs to be VACUUM TIGHT since it's coming from the PCV. Meaning that you DON'T punch a hole in it, or run a breather filter in the can. If so, then that means you have just created a HUGE vacuum leak!

The catch can is not pressurized because it's vacuum. So as long as you keep it vacuum tight, nothing will explode because vacuum = negative pressure.

If you guys are talking about the breather valve that attaches to the intake tube before the throttlebody, it works differently than the PCV. You will need to attach the catch can "in-line" with the breather valve on the valvecover. The hose should come out from the valvecover, then into the catch can, and from the can back out into the intake tube. There is no vacuum there because the breather valve is not vacuum tight (it's before the throttlebody).

Understand guys? :P

[Deep]

Just a quick fyi, a martini shaker from Ikea for around 10 bones and 2 threaded hose fittings and grommets for $5 from a parts store will make a kickass catch can. Drill 2 holes in the top of the shaker, put the grommets in the holes, slide a washer over one end of the fitting, put it in the grommet, throw another washer on the other end (inside of the lid), tighten the nut to compress the grommet and make a seal.

[fatredcircle]

Originally Posted by Tony the Tiger

Are some of you getting confused with the concept of oil catch cans? I hear the word "pressure", "venting", etc...

A catch can is suppposed to have a hose going into the catch can and out... The hose from the PCV valve goes into the catch can, and then a hose from the catch can goes back into the intake manifold. It's supposed to let the denser oil vapours settle and the can "catches" the oil from the vapours and return clean air back into the engine.

This catch can needs to be VACUUM TIGHT since it's coming from the PCV. Meaning that you DON'T punch a hole in it, or run a breather filter in the can. If so, then that means you have just created a HUGE vacuum leak!

The catch can is not pressurized because it's vacuum. So as long as you keep it vacuum tight, nothing will explode because vacuum = negative pressure.

If you guys are talking about the breather valve that attaches to the intake tube before the throttlebody, it works differently than the PCV. You will need to attach the catch can "in-line" with the breather valve on the valvecover. The hose should come out from the valvecover, then into the catch can, and from the can back out into the intake tube. There is no vacuum there because the breather valve is not vacuum tight (it's before the throttlebody).

Understand guys? :P

WRONG!!!!!!!!!!!!

you will not have a huge vacumn leak and it doesn't HAVE to be revented back to the valve cover.

a catch can is simple as it is eefective...it catches any fluids (whatever you want it to catch) so they do not drip on the track and cause a fricking slip n' slide...

Nick

[Deep]

If you're making an OIL catch can for a car with a PCV system it would have to be airtight to avoid a vacuum leak. In other fluids fatred is right.

[Tony the Tiger]

WRONG!!!!!!!!!!!!

you will not have a huge vacumn leak and it doesn't HAVE to be revented back to the valve cover.

a catch can is simple as it is eefective...it catches any fluids (whatever you want it to catch) so they do not drip on the track and cause a fricking slip n' slide...

Nick

You smoking something there fatredcircle? Or is it just plain ignorance? A catch can runs in and out of the PCV system since it filters out oil vapours and returns clean air back into the engine. Oil vapours causes unnecessary detonation because oil will separate air and fuel inside the combustion chamber which lowers fuel atomization.

What kind of retatrded theory of yours to say that an oil catch can catches oil that are "dropping" at the track? LOL! You better invest in some new gaskets if your car is dropping oil, and not a damn catch can.

Here's a link that explains how an oil catch can works, and how it is installed:
http://www.c-speedracing.com/howto/c.../catchcan.html

Here's another link talking about how a catch can runs in-line with the PCV, this time, in a LS1 motor:
http://www.2phast.com/porsche/Corvette/catchcan.htm

I have already explained this fully in my previous post, but god knows why you were having such a hard time understanding this. Let me say it again... if the catch can is running with the PCV, IT HAS TO BE AIR TIGHT. If you punch a hole, what's the diff between punching a hole in the PCV hoses? Punching a hole = VACUUM LEAK. Understand that fatredcircle. In my understanding, you DON'T have a catch can, and you have never done work on your own car as far as PCV system goes...

The PCV is NOT the breather at the valvecover. Why are you mixing them up? The valve cover breather runs BEFORE the throttlebody, then how could it be vacuum tight?
Read my own post AGAIN:

Posted by Tony the Tiger
There is no vacuum there because the breather valve is not vacuum tight (it's before the throttlebody).

Let me say this again... if you are running the catch can in and out of the PCV, it has to be air tight. If you are running it in-line with the valvecover breather, than it doesn't need to be air tight.

Next time, don't just say someone is WRONG when you don't even have experience with catch cans. Don't base your discussion with internet hearsay. I didn't even expected that I had to school your ass in such a simple concept of oil catch cans.

[DaksGT]

Tony....I want to paint you.

[fatredcircle]

Since it was my brother whom posted that, don't be knocking on my name buddy.
Second, don't ever say that my brother and I DO NOT do work on our own cars.
You don't even know who the fack we are, and we probably don't even know you, so don't be throwing around these insults.

"I have already explained this fully in my previous post, but god knows why you were having such a hard time understanding this. Let me say it again... if the catch can is running with the PCV, IT HAS TO BE AIR TIGHT. If you punch a hole, what's the diff between punching a hole in the PCV hoses? Punching a hole = VACUUM LEAK. Understand that fatredcircle. In my understanding, you DON'T have a catch can, and you have never done work on your own car as far as PCV system goes... "

And you know what? the 4age motor will run fine without the PCV hose connected, and it doesn't create a huge vaccum leak, as the engine still runs, and the 4age is very sensitive to vaccum leaks.

"The PCV is NOT the breather at the valvecover. Why are you mixing them up? The valve cover breather runs BEFORE the throttlebody, then how could it be vacuum tight? "

It runs before the throttle body? Well, i knew it was connected to the intake manifold but my haynes book says " on carburetor-equipped models, the main components of the pcv system are the pcv valve, a fresh air filtered inlet and the vacuum hoses connecting these components with the engine. ON FUEL INJECTED models, it only consists of a PCV hose between the valve cover and the INTAKE MANIFOLD."


Don't have experience with oil catch cans? LOL.. don't have experience working on our own car? LOL... ask any of those old school toyota guys if we work on our own cars, so get your understanding right and stfu.

[bondobondo]

i know i moderate here but.......

both of you are somewhat right,
I run a catch can, and it is done like how every japanese modded engine i have seen done. Only in american magazines i have seen ppl actually routing catch cans back into the intake.


i'll let you guys keep going at it.

[fatredcircle]

andrew
its 3 people
nick, me and tony the tiger