catch can on intake?
#3
Metatron
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"Normal".....
It's quite normal. Not good, but "normal".
I put a can on the back of the airbox, it currently has about 20mm of oil in it!
The 2007s that are coming in DO have a PCV valve on them, and in Europe there is a retro-fit kit available, completely updated vent hoses, moved the intake connection etc.
Coming soon to the US......
S
I put a can on the back of the airbox, it currently has about 20mm of oil in it!
The 2007s that are coming in DO have a PCV valve on them, and in Europe there is a retro-fit kit available, completely updated vent hoses, moved the intake connection etc.
Coming soon to the US......
S
#6
Modulated Moderator
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I have had that problem. So far they have said it's normal.....but there is a new baffled oil pan, and the 2006's have a reworked breather system that would blow the oil into the vacuum ports on the lower intake manifold and be burnt..
I think there is a retrofit kit for the breather out there for the problem cars.
Like TeamRX8 I think that there is a problem with this....I think that excess blowby is the cause....we will see
I think there is a retrofit kit for the breather out there for the problem cars.
Like TeamRX8 I think that there is a problem with this....I think that excess blowby is the cause....we will see
#10
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don't flame me but the way i understand it a p.c.v. valve is known to be a positive crankcase valve something the rx8 can't use because of the fact it's a oil burner.and if you do that it would cause it to burn even more.i could be wrong but time will tell.
#12
INDY RX8 CLUB - Officer
I have this happen as well. Seems to corrolate w/ oil overfill, but if Teamrx8 and others run it overfilled with no issues, I don't know what to make of it.
#13
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I put a catch can on, but not for oil being blown into the intake. Never had that issue, don't know how so many people could have.
Lots of people, from my searching, experienced the sludge on the dipstick issue, though. All this is caused by is condensation. Since there was no PCV system stock, I added a catch can that goes from the oil filler neck nipple to the can, back to the intake. This has effectively stopped the condensation issue and I haven't had any residue on my oil dipstick since then.
Lots of people, from my searching, experienced the sludge on the dipstick issue, though. All this is caused by is condensation. Since there was no PCV system stock, I added a catch can that goes from the oil filler neck nipple to the can, back to the intake. This has effectively stopped the condensation issue and I haven't had any residue on my oil dipstick since then.
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Originally Posted by TeamRX8
I've never had that issue either
#16
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hi guys,i just my understanding on catch cans, to be honest i dont know much about rotarys but i have some knowledge on doing up nissan gtr engines, which i think is similar when it comes to the p.c.v (positive crankcase ventilation valve). The the oil deposits and gases that come out of the pcv is acutally polluted, and isnt very good for it to re circulate back in the engine, so it is re fed back to the intake so it can be totally combusted in the chambers, burnt and sent out thru the exhaust . Now when it comes to catch cans, the advantage of this is that it catches all the **** and prevents it from entering the intake, which is standard on most cars in my understanding . The downside of not having one installed, is that when the fumes enter the intake it isnt clean oxygen, hence it will lower ur fuel octane when the fumes enter ur engine . Having one installed will actually increase your octane level and will help with pinging to a certain extent, also help with combustion as cleaner air enters the chamber which will increase in slightly higher hp gains , and sorry i dont have dyno figures to prove this but i would highly recomend doing so, especially if u install eg canzoomers unit to retune the car i am sure it will help , sorry for all this write up but my 2cents worth as i dont write up much :-) but i sure read alot !
Hope thats easier reading
Hope thats easier reading
Last edited by godzilla; 05-31-2006 at 04:30 PM.
#18
there is no arguement that some of the renasis engines are having blow back issues. Question is why? Dont know?
New models have new type vent systems --dont know if that will be a tsb for the older ones.
So-----anyone know of a good catch can? reasonable price? best way to hook it up?
olddragger
New models have new type vent systems --dont know if that will be a tsb for the older ones.
So-----anyone know of a good catch can? reasonable price? best way to hook it up?
olddragger
#19
Utopia Taco Bell
Could I request some pictures here of what the heck you guys are all talking about?!
What does the ventilation hose look like and where does it attach to the intake.
What does the catch can look like?
I'm a bit lost. I had a PCV valve on my Protege 5 with a ventilation hose back into the intake but I disconnected it , plugged the connector at the intake and terminated the valve cover's vent with something that looks like a small air filter. Am I hot, cold, or warm? Yeah yeah yeah... what's a valve cover...
Thanks for the schooling in advance.
What does the ventilation hose look like and where does it attach to the intake.
What does the catch can look like?
I'm a bit lost. I had a PCV valve on my Protege 5 with a ventilation hose back into the intake but I disconnected it , plugged the connector at the intake and terminated the valve cover's vent with something that looks like a small air filter. Am I hot, cold, or warm? Yeah yeah yeah... what's a valve cover...
Thanks for the schooling in advance.
#20
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Originally Posted by olddragger
there is no arguement that some of the renasis engines are having blow back issues. Question is why? Dont know?
New models have new type vent systems --dont know if that will be a tsb for the older ones.
So-----anyone know of a good catch can? reasonable price? best way to hook it up?
olddragger
New models have new type vent systems --dont know if that will be a tsb for the older ones.
So-----anyone know of a good catch can? reasonable price? best way to hook it up?
olddragger
And as far as hooking it up, and for some reference pictures for 416to212, I have some pics. I ran a line from the oil filler neck nipple, which USED to go straight into the intake, to the catch can. From there the catch can runs back to the intake. This will "pull" the condensation/oil vapor out of the neck, through the line, and into the can. The large particles of condensation/residue will stay in the can and lingering vapor will go back into the intake to be burned up in the engine.
Here are the pics, you can see my ebay catch can in between the coolant overfill and intake.
#21
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This is similar to what I have, but it's a different shape/size.
http://cgi.ebay.com/ebaymotors/OIL-C...QQcmdZViewItem
But really all you have to do is find the one that will work for you depending on where you want to mount it, how you want it to look, etc. I had this left over from my rx7 and just made it work, was fairly simple. They come with a couple brackets usually and from there you just have to find a place to mount it. Oh and the tubing they supply usually sucks, wont fit right, or is ugly so just go out and buy some rubber hose that will fit.
http://cgi.ebay.com/ebaymotors/OIL-C...QQcmdZViewItem
But really all you have to do is find the one that will work for you depending on where you want to mount it, how you want it to look, etc. I had this left over from my rx7 and just made it work, was fairly simple. They come with a couple brackets usually and from there you just have to find a place to mount it. Oh and the tubing they supply usually sucks, wont fit right, or is ugly so just go out and buy some rubber hose that will fit.
#22
Utopia Taco Bell
dDuB.
Thank you very much for your pictures. It has cleared up a significant amount of my confusion. However, I have one more question... Why can't we just vent into the atmosphere rather than actually catching it and sending vapours back into the intake? Besides the legal implications is there anything wrong with my suggestion. I did this on my Protege5, I can't see it being a problem in this application.
Thank you very much for your pictures. It has cleared up a significant amount of my confusion. However, I have one more question... Why can't we just vent into the atmosphere rather than actually catching it and sending vapours back into the intake? Besides the legal implications is there anything wrong with my suggestion. I did this on my Protege5, I can't see it being a problem in this application.
#23
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Originally Posted by 416to212
dDuB.
Thank you very much for your pictures. It has cleared up a significant amount of my confusion. However, I have one more question... Why can't we just vent into the atmosphere rather than actually catching it and sending vapours back into the intake? Besides the legal implications is there anything wrong with my suggestion. I did this on my Protege5, I can't see it being a problem in this application.
Thank you very much for your pictures. It has cleared up a significant amount of my confusion. However, I have one more question... Why can't we just vent into the atmosphere rather than actually catching it and sending vapours back into the intake? Besides the legal implications is there anything wrong with my suggestion. I did this on my Protege5, I can't see it being a problem in this application.
By only venting it to the atmosphere will not fix this particular problem. You need a source of vacuum to PULL the condensation OUT of the oil system and deposit it somewhere. That will then pull out all the extra oil vapor/condensation floating around and fix this issue. Venting it won't do anything.
What is the purpose even of venting straight to the atmosphere? I don't understand... If you're going to do that why not just leave it stock? There's no point in venting it straight out when you can just leave it the way it was stock. The only reason, like I said, I changed from stock was because there is NO PCV system present and I wanted a way to get the condensation out of the oil system.
I guess I just don't understand the purpose of venting it rather than leaving it hooked up... Not like it provides any gain.
#24
where exactly on the oil dipstick would the condensed sludge show? i took a look at mine today & it appears to be sludge free... if i'm in the clear for now, would it still be a good idea to do this mod in case of future issues??
#25
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Originally Posted by dgrx8
where exactly on the oil dipstick would the condensed sludge show? i took a look at mine today & it appears to be sludge free... if i'm in the clear for now, would it still be a good idea to do this mod in case of future issues??
It is much more common in colder times of the year and in colder areas. Being in Miami you might not have to worry ever. Example is I got my car in the spring and all through spring/summer nothing, hit fall/winter and it started showing up. But the catch can fixed it during the colder months and I haven't seen it come back since.