Beastmode panda Posted October 31, 2012 Share Posted October 31, 2012 (edited) Hey guys.Just a quick question regarding the PCV valve on the rocker cover! Basically when i went td04, i put my catch can on at the same time, so obviously thought id be the cool guy and i ran the hose off the PCV and off the breather (like normal).. But the car was smoking ALOT, so i searched it up on youtube and came across a video of a 240sx having the same problem, and someone said change it back to normal (i.e connect the PCV to the inlet mani like normal) and it will stop smoking. Now first of all i thought it was smoking as a result of something else inside the engine as the oil seals had gone in my ct9 turbo, thus - oil in baffles creating even more smoke as you can imagine.BUT, and here is the bit i need to know really - I've seen a lot of people just bung up the unlet mani side and run a hose off the PCV to the catch can, pretty much like i had it.. Except mine was smoking :s, something to do with it circulating and not ACTUALLY breathing (i think) then it just goes back out the exhaust creating the smoke. Do i have to run a pipe coming off the inlet mani to the atmosphere allowing it to breath? Cause i just had it bunged up with a bolt.So i just wana know basically how the fuck can i run a PCV, AND 2 hoses off my rocker to my catch can without it smoking........ Cause i'm puzzled.Cheers. Edited October 31, 2012 by Rbz. Quote Link to post Share on other sites
Beastmode panda Posted October 31, 2012 Author Share Posted October 31, 2012 This is EXACTLY how mine was set up, 1 pipe off the main rocker breather, 1 pipe off the PCV and the inlet mani one blocked up with a bolt.HELP ME!!!! Quote Link to post Share on other sites
TrisK Posted October 31, 2012 Share Posted October 31, 2012 ok, this is the correct set upUsing a sealed catch can.as you can see a 2nd one way valve is used to stop the can becoming presurized under boost.The other breather on the engine should go to your air filter, after the filter, before the turboThis is the correct set up. Quote Link to post Share on other sites
corofin12345 Posted October 31, 2012 Share Posted October 31, 2012 the PCV doesnt open once the throttle body flap/butterfly is open.. it only opens on idle when when the inlet manifold isnt under pressure..how many pipes are on your catch can??? is there any to atmosphere??? Quote Link to post Share on other sites
Beastmode panda Posted October 31, 2012 Author Share Posted October 31, 2012 Cheers Trisk!!I'm running 1 pipe off the main rocker breather to the catch can then from the catch can to the atmosphere. And the PCV is connected to the inlet mani. Quote Link to post Share on other sites
corofin12345 Posted October 31, 2012 Share Posted October 31, 2012 ukso went mental on me for awhile there.... you first pic is wrong cause all thats doing is closing the PCV and the pressure is coming back into the head via the other breather.. id just leave the PCV to inlet and other breather to catch can with other outlet on catch can to atmosphere Quote Link to post Share on other sites
TrisK Posted October 31, 2012 Share Posted October 31, 2012 A catch can should never go to atmosphere. It's not designed to be an open system Quote Link to post Share on other sites
corofin12345 Posted October 31, 2012 Share Posted October 31, 2012 (edited) A catch can should never go to atmosphere. It's not designed to be an open systemand what do people do with the breather when they get rid of the EFI pipe? they put a filter on it... this way your catching the oil residue while venting the fumes.. im not talking about the PCV.. theres always pressure from the breather Edited October 31, 2012 by corofin12345 Quote Link to post Share on other sites
TrisK Posted October 31, 2012 Share Posted October 31, 2012 and what do people do with the breather when they get rid of the EFI pipe? they put a filter on it... this way your catching the oil residue while venting the fumes.. im not talking about the PCV.. theres always pressure from the breatheryeah that is bad practice also.it should be plumbed back into the new air filter piping.im not saying that people dont do it, hell ive even done it cause its easierbut its not the best way to do it Quote Link to post Share on other sites
corofin12345 Posted October 31, 2012 Share Posted October 31, 2012 (edited) yeah that is bad practice also.it should be plumbed back into the new air filter piping.im not saying that people dont do it, hell ive even done it cause its easierbut its not the best way to do itive done it on mine and others with zero problems... sorry for not been green about it, lol Edited October 31, 2012 by corofin12345 Quote Link to post Share on other sites
TrisK Posted October 31, 2012 Share Posted October 31, 2012 ive done it on mine and others with zero problems... sorry for not been green about it, lolits not that is not green matethe problem is that nothing draws the fumes out. the pcv will when your off boost, as it will suck the gases out of the pcv sidebut when you are on boost, that shuts, then nothing sucks the gasses out.thus why it is connected to the air filter, as that will actually suck the gasses out the crank case Quote Link to post Share on other sites
corofin12345 Posted October 31, 2012 Share Posted October 31, 2012 (edited) its not that is not green matethe problem is that nothing draws the fumes out. the pcv will when your off boost, as it will suck the gases out of the pcv sidebut when you are on boost, that shuts, then nothing sucks the gasses out.thus why it is connected to the air filter, as that will actually suck the gasses out the crank casethat breather expels the gas mate... on boost, off boost whichever... the only reason why they put this breather back to the efi pipe is to re burn the gasses and residue and to a certain extent, "suck the gases"... now, if your using higher boost bigger turbos etc etc then id suggest it... theres loads of ways in doing it, i do it this way and never had problems plus for worn engines with excess crank case pressure its save all the gunk going back through the turbo/intercooler and not to mention boost controller solenoids Edited October 31, 2012 by corofin12345 Quote Link to post Share on other sites
Beastmode panda Posted October 31, 2012 Author Share Posted October 31, 2012 Haha easy guys .But if there isn't a break in the circulation for it to be filtered then the fumed and favours will just keep circulating and going round and round, and the idea is to filter out the bad fumes. So why is it not best to vent it to the atmosphere? I checked in my catch can to drain it yesterday and literally fuck all came out........ Is that BECAUSE it's vented to the atmosphere?? Quote Link to post Share on other sites
TrisK Posted October 31, 2012 Share Posted October 31, 2012 Haha easy guys .But if there isn't a break in the circulation for it to be filtered then the fumed and favours will just keep circulating and going round and round, and the idea is to filter out the bad fumes. So why is it not best to vent it to the atmosphere? I checked in my catch can to drain it yesterday and literally fuck all came out........ Is that BECAUSE it's vented to the atmosphere??yep.if you close the system then the catch can will collect the muck in the bottom.nastyrash was the man to ask, i learnt most of the what from him. but hes the man that knows the why Quote Link to post Share on other sites
Beastmode panda Posted October 31, 2012 Author Share Posted October 31, 2012 True! But won't SOME of it re circulate? Then it's just pointless in having the catch can if it's not being able to breathe??Awsome man thanks! Quote Link to post Share on other sites
corofin12345 Posted October 31, 2012 Share Posted October 31, 2012 (edited) yep.if you close the system then the catch can will collect the muck in the bottom.nastyrash was the man to ask, i learnt most of the what from him. but hes the man that knows the whyso run a hose from breather to catch can and not let catch can breathe? sorry if im taking you up wrong but if thats the cases then all your doing is bunging up that breather in theory keeping the excess pressure in the crack case.. do explain if im taking you up wrong tho, i just think we are not on the same page.. im not on about the PCV, im on about the other breather @rbz, ive very rarely seen a catch can full of oil, in fact, the only time i came across that it was half full but that engine had problems but even at that it took months to fill that much ... oil wont pour out that breather, its only residue and vapours.. if theres alot coming out, theres underlining problems with your engine so your engine is healthy... guys ive owned my glanza years and have worked on these cars for much longer... its actually what i specialise in....heres just one example and this car is taken care of by no other than chris carson.. if it was wrong, he would change it! Edited October 31, 2012 by corofin12345 Quote Link to post Share on other sites
TurboTobz Posted October 31, 2012 Share Posted October 31, 2012 (edited) Seen/heared of issues with running it via pcv. Mines personally matched corofins set up, although had the car nearly a month never seen anything in it - could well have been emptied prior to buying it, but of course there's not meant to be a major amount within it.P.S. Corofin, that bays stunning! Is it yours? Edited October 31, 2012 by TurboTobz Quote Link to post Share on other sites
TrisK Posted November 1, 2012 Share Posted November 1, 2012 I'll see if I can find nastys thread, or draw a diagram of what I mean Quote Link to post Share on other sites
corofin12345 Posted November 1, 2012 Share Posted November 1, 2012 Seen/heared of issues with running it via pcv. Mines personally matched corofins set up, although had the car nearly a month never seen anything in it - could well have been emptied prior to buying it, but of course there's not meant to be a major amount within it.P.S. Corofin, that bays stunning! Is it yours?nope, not mine.. one of irelands nicest glanzas tho.... Quote Link to post Share on other sites
Beastmode panda Posted November 1, 2012 Author Share Posted November 1, 2012 Yep that's exactly how mine is except on the can i don't have a filter, mines just vented.That's ok then, just wanted to double check i was doing it right! I took off the hose that connects the pcv to the inlet and the pcv was pretty damn oily, is that normal?And DANNNNNNNG that engine bay is sexy! Love his build up thread. Insane car. Quote Link to post Share on other sites
5T4R7ET N/A Posted November 1, 2012 Share Posted November 1, 2012 ^^ with the engine bay pictured above, I believe you dont need a catch can from that breather.all you need is a filter. if you have oil coming out of the breather (one on the left) your pistons rings are gone. only excess air should come out of it.actually you dont even need a filter on there but it's helpful in stopping moisture getting inside the engine especially in winter. ( and its looks better) Quote Link to post Share on other sites
StarletMad Posted November 1, 2012 Share Posted November 1, 2012 Yeah but surely your bound to get oil coming out of it thats exactly how my catch can was set up also...I have a small filter on mine and get the tiniest amount of oil coming out mine. :/ Quote Link to post Share on other sites
corofin12345 Posted November 1, 2012 Share Posted November 1, 2012 oil residue and vapours will always come out that breather even if the engine is brand spanking new... a filter is fine but it gets clogged up too easily leaving you back to excess crack case pressure and not to mention a oily rocker cover, lol..... Quote Link to post Share on other sites
Beastmode panda Posted November 2, 2012 Author Share Posted November 2, 2012 I hear you brothers.So getting oil around the PCV is ok and nothing to worry about yeah? I don't mean oil pouring out, i mean little enough to consider it as lubrication lol. My engine is healthy, only on 75k miles, all lovely and clean under the rocker, everything is nice and shiney with dabs of oil on the lobes and stuff as it should be. Plugs don't get gunked up with oil n none of that shiznit. Quote Link to post Share on other sites
Flaminsam Posted November 2, 2012 Share Posted November 2, 2012 Here's a bit of reading for you. />http://www.burtonpower.com/tuning-guides/tuning-guide-pages/engine-breather-system.htmlSorry its from a ford orientated site. Quote Link to post Share on other sites
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