Went to the track today, and noticed that my oil catch can had filled up after only a few laps. Is this good or bad? I checked my oil level and it remained pretty consistent throughout the day. I've got the catch can hooked up to the PCV and then another hose from the catch can to the intake manifold.

 

Hmmm ... reminds be I need to empty mine.
I only get a few ounces, if that.

 

Good question, I had the same thing happen to me.....I noticed it was full....after my engine blew. Believe they were unrelated though.

Anyone have some insight on this?

 

PCV stuck open? i dunno

 

Endyn's setup allows for the system to drain back into the engine by way of putting a PCV on the catch can.

anywho, I wouldn't worry, just check and drain back.

 

Interesting. I have my first track day today with my new catch can, so I'll see how much I get. I've heard between 1/4 quart and 1/2 quart is normal for one track day.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TodaSi &raquo;</TD></TR><TR><TD CLASS="quote">Good question, I had the same thing happen to me.....I noticed it was full....after my engine blew. Believe they were unrelated though.

Anyone have some insight on this?</TD></TR></TABLE>

I think they are related!! Remember, the main reason for a catch can is to capture any oil residue caused by blow-by (oil getting passed the piston rings). When your piston rings are excessively worn or damaged, more oil gets into the combustion chamber causing more oil residue and crankcase pressure.

I would do a compression check to make sure you having blown anything. If everything checks out, check the PCV valve as someone suggested. A bad PCV can cause the same symptoms as a blown engine...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jim80y &raquo;</TD></TR><TR><TD CLASS="quote">Went to the track today, and noticed that my oil catch can had filled up after only a few laps. Is this good or bad? I checked my oil level and it remained pretty consistent throughout the day. I've got the catch can hooked up to the PCV and then another hose from the catch can to the intake manifold.</TD></TR></TABLE>

Stock motor??

 

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

Stock motor??</TD></TR></TABLE>

Pretty much stock motor, only have a cat-back exhaust.

 

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

I think they are related!! Remember, the When your piston rings are excessively worn or damaged, more oil gets into the combustion chamber causing more oil residue and crankcase pressure.

I would do a compression check to make sure you having blown anything. If everything checks out, check the PCV valve as someone suggested. A bad PCV can cause the same symptoms as a blown engine... </TD></TR></TABLE>

I thought a catch can collected oil that blew thru the PCV valve.

I dont see how a cach can would get oil that passed the rings and before it was consumed by the hellfire in the cylinder???

hmmmm

 

My can is full after every 20 min session. Something about full throttle VTEC


But during normal/spirited daily driving and drag racing, I just get a few drops in the can, nothing significant.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ITR#132 &raquo;</TD></TR><TR><TD CLASS="quote">My can is full after every 20 min session. Something about full throttle VTEC


But during normal/spirited daily driving and drag racing, I just get a few drops in the can, nothing significant.</TD></TR></TABLE>


is your catch can baffled? if so, what did you use to baffle it with?

 

Yes its baffled. I bought it that way.

Baffles are there to stop oil vapors from being sucked into the intake manifold, It does not have any effect on how much is collected into the tank. Crankcase pressure from constant high RPM is what fills the tank.

 

blowby? Whouldn't this get burned to a crisp and evacuated via the exhaust? How is a catch can supposed to intercept this unless you install it on the downpipe? This doesn't compute. I thought a catch can caught oil expelled thru the breather hole on valve cover. How is it supposed to get there after being burned in the chamber?

EDIT: Ahhh. Floyd, Your explanation makes A LOT more sense. That would be why it is called BLOW by and not seepage or something stupid like that. Thanks for straightening me out. Now I won't make an idiot of myself anymore, for awhile.


Modified by d16tuner at 10:12 PM 9/17/2003

 

A lot of missinformation here...

Blowby is the exhaust gases that blow past the piston rings into the crankcase as a result of the explosion in the cylinder. The gases create a postive pressure in the crankcase. The PCV (positive crankcase ventilaiton) system is designed to take these gasses and vent them into the intake manifold so they can be mixed into the air/fuel in the cylinder for another combustion cycle. It's an emissions control system.

The problem with the system is that oil vapor gets mixed with the blowby gas in the crankcase and it is passes through the PCV system. When it gets dumped into the intake manifold, the oil vapor contaminates the clean air that is being sucked into the cylinders. This results in loss of power, among other issues.

The catch can gets mounted between the PCV valve and the intake manifold to "catch" the oil vapor, re-condense it, and either drain it back into the block, or gather it until you come and empty it. It has nothing to do with the hose that runs from the valve cover to the intake air tube.

If your can is filling that quickly, you may want to recheck your hoses to and from the catch can. Is it possible you have the output of the catch can feeding the wrong inlet in the intake system creating a vacuum in the catch can, which is effectively syphoning the oil out of your block into the can?

Someone please correct me if I have anything wrong, as I wouldn't want to contribute to the missinformation.

 

Here's a thread from the archives that talks about it. Do a search. I came up with 62 threads on "catch can".

Proper way to mount catch can? [Archived]

Unfortunately a lot of the pics are broken, including the stellar diagrams that someone drew on a napkin (if I remember correctly).

 

when open the hood and i see that the catch can got full and all he oil sprayed everywhere through the filter on the top. note i clean it after running and i delete the PCV system and delete mounted between the PCV valve and the intake manifold to "catch" and install aluminum block plugs and freeze plug caps in the back into the block So anybody have any suggestions why this happen?