Do oil catch cans like this one

http://www.groupbuycenter.com/buy.aspx?id=11586

Really serve any purpose?

Supposedly it is supposed to reduce the sludge

build-up inside the engine.

thanks in advance for all posts

 

anyone ? =|

 

I have one on my turbo-diesel. It doesn't necessarily reduce sludge but there is some crankcase pressure at times that forces a little oil out and the can keeps if off the motor

 

I would say to a point, yes they do being that oil does stay in the can.

 

thanx

 

A catch can is a good thing to add to your honda because the little hose from your valve cover to your intake is just blow off oil. Why put that oil into your intake manifold and throttle body and get that all gummed up with oil and sludge?

Some people use soda bottles!

 

I would only use MOroso 45740 unit because I don't think cusco or any other tanks that I checked way back in 97 had any baffle to separate any of teh oil vapours. Check out my old web site for some details...scroll down...
http://www.angelfire.com/ca/DrOhm/hybrid.html

 

not meaning to hijack the thread but others could possibly use this information...

EFSiR:
what PCV and PCV grommet did you use? i've got a Moroso tank myself but i could never get the proper sized grommet so i always had a small leak!

thanks

 

the point of a catch can is to prevent oil vapors to go back into the intake track. its designed that way from the factory because the negative pressure is used to draw out the oil vapors from the crankcase and valve cover to reduce emissions. so if you dont care about emissions and do care about keeping your engine clean, all you need to do is just redirect the valve cover hose and PCV hose to another location, ala catch can. yes, some just use a soda bottle, itll work just fine without the negative pressure caused by the intake air velocity. but some like to insure there is a negative pressure draw so they connect it back to the intake and design a baffle in the catch can that is inline. i suppose you could still create a decent baffled system out of a soda bottle and some steel wool actually... cut a bottle in half, stuff the top with steel wool, make an intake nipple(s) on the lower half and an exit on the cap and seal with duct tape.

as for a PCV grommet, what is commonly done is just modify an old PCV valve to always open. makes for the perfect grommet. not sure if thats the answer you were looking for.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tyson &raquo;</TD></TR><TR><TD CLASS="quote"> cut a bottle in half, stuff the top with steel wool, make an intake nipple(s) on the lower half and an exit on the cap and seal with duct tape.

as for a PCV grommet, what is commonly done is just modify an old PCV valve to always open. makes for the perfect grommet. not sure if thats the answer you were looking for.</TD></TR></TABLE>

this way owns u

 

My home made one has about 1-2 Cm's of oil in the bottom of it which would have otherwise gone into my engine so yes they do work.

 

The PCV system isn't connected to the valve cover. PCV = Positive Crankcase Ventilation... The crankcase is in the block, not the head.

Also, by adding a catch can to replace the stock PCV system, you will lower your emissions AND keep the engine cleaner. Oil vapors in the intake tract increase emissions, reduce power, and sludge up anything that gets in its way. The only drawback of using a catch-can is that you have to clean out the can every once in a while. Other than that, there are only benefits.

However, I do like what UDSM 4G VTEC shows in his picture...


Add another one of these after the PCV valve, and you've got yourself a decent filteration system... I like it!


Modified by MrTodd at 5:01 PM 8/12/2003

 

Isnt that a type of fuel filter? I've seen similar in a buddys truck that are see through like that. And would the filtering have any effect on the ammout of vaccum and thus have other side effects or does it not really matter?

 

thank you

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hatchback &raquo;</TD></TR><TR><TD CLASS="quote">I still dont understand how one would benifit from an oil catch can.. Can you please explain? </TD></TR></TABLE>

oil vapors in the combustion chamber lower the octane of the fuel, not good for high compression engines. also, oil tends to accumulate in turbo intercoolers as the oil vapor condenses, not a good thing. its not a bolt on horsepower thing, its for keeping the engine clean and running well.

 

great info. I also wanted to know why they did not make all cars to come with them?

 

Very good thread Thanks for the info.
Mark

 

sleeper4dr
I found those at a store that not in the US( Canadian Tire) The PCV is a Fram unit, 294 rings a bell, not sure though...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tyson &raquo;</TD></TR><TR><TD CLASS="quote">the point of a catch can is to prevent oil vapors to go back into the intake track. its designed that way from the factory because the negative pressure is used to draw out the oil vapors from the crankcase and valve cover to reduce emissions. so if you dont care about emissions and do care about keeping your engine clean, all you need to do is just redirect the valve cover hose and PCV hose to another location, ala catch can. yes, some just use a soda bottle, itll work just fine without the negative pressure caused by the intake air velocity. but some like to insure there is a negative pressure draw so they connect it back to the intake and design a baffle in the catch can that is inline. i suppose you could still create a decent baffled system out of a soda bottle and some steel wool actually... cut a bottle in half, stuff the top with steel wool, make an intake nipple(s) on the lower half and an exit on the cap and seal with duct tape.

as for a PCV grommet, what is commonly done is just modify an old PCV valve to always open. makes for the perfect grommet. not sure if thats the answer you were looking for.</TD></TR></TABLE>

wow...maybe i should get a catch can...or make one

 

There's another post on this
The one that's attached to the valve cover is actually wrong. It should go inline with the PCV system. Like this:

another one


It's not bad to make one and put it on the valve cover. I'm thinking of making one myself. But if you do BUY a catch can remember to put in on the PCV

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blah13 &raquo;</TD></TR><TR><TD CLASS="quote">Isnt that a type of fuel filter? I've seen similar in a buddys truck that are see through like that. And would the filtering have any effect on the ammout of vaccum and thus have other side effects or does it not really matter?</TD></TR></TABLE>

Yeah, it is a in-line fuel filter. But it's really a piece of crap for what it's designed for - don't use it to replace your stock fuel filter!!!! However, it should be pretty effective in catching some oil vapors in the PCV system. I'm actually going to head down to the local parts store(s) and see if I can pick one up, then I'll be adding it to my PCV tubing. If it filters out any oil, you should be able to see it in the little filter, or pooling up in the bottom of the casing. I will soon find out cuz I'm too poor to afford a real catch can! Im tha PiMp gH3tt0 RiDa

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by acydphryck &raquo;</TD></TR><TR><TD CLASS="quote">

wow...maybe i should get a catch can...or make one </TD></TR></TABLE>

btw, im not even recommending get a catch can. no one NEEDS one. engines work fine as they are. use some intake cleaner once in a while if you want to keep your engine clean.

 

thanks for all the info guys! also.. if it helps.. why not?

 

Beacuse they don't really do much, cars can rack up thousands of miles and never need one. Most people only get them because they look cool.
I made mine for $10

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by photonjedi808 &raquo;</TD></TR><TR><TD CLASS="quote">There's another post on this
The one that's attached to the valve cover is actually wrong. It should go inline with the PCV system. Like this:

another one


It's not bad to make one and put it on the valve cover. I'm thinking of making one myself. But if you do BUY a catch can remember to put in on the PCV</TD></TR></TABLE>


so those pix are of how they should look like? and the correct way to hook it up?

or are you showing us examples of how NOT to hook it up.