Greddy Oil Seals Leaking????
blocked off lower plenum fitting, installed a catch for each side "dual catch cans", then plumbed each line exiting the catch cans to the inlet side of the supercharger. i have periodicaly checked my intercoller and plumbing for residual oil and none has been found ,this setup is working superbly!! all other setups i have configured has netted some type of oil in the ic,ic piping or the plenum. now there there is no oil to be found in these componets as well as my oil stays cleaner longer with nearly no oil consumption between oil changes. i am going to try and post some pics, i think that will explain things better.
Has anyone ever measured vacuum from a turbo or s/c air inlet?
Bringing this back up...
Spoils - do you not have any idle issues, such as a high-idle or other symptoms of a vacuum leak? With the breather on the driver's side crankcase, you would think the intake manifold would be able to suck in a decent amount of unmetered and unregulated air through the passenger side PCV.
Spoils - do you not have any idle issues, such as a high-idle or other symptoms of a vacuum leak? With the breather on the driver's side crankcase, you would think the intake manifold would be able to suck in a decent amount of unmetered and unregulated air through the passenger side PCV.
That's good news. I don't know why it wouldn't have a bit of any idle surge, since the both crankcase breathers are connected (through the crankcase itself, and the crossover tube). So when the intake is sucking in air through the passenger side PCV, it should be sucking air in through the driver's side breather tube.
Bringing this back up...
Spoils - do you not have any idle issues, such as a high-idle or other symptoms of a vacuum leak? With the breather on the driver's side crankcase, you would think the intake manifold would be able to suck in a decent amount of unmetered and unregulated air through the passenger side PCV.
I actually just went ahead and purchased some check valves like you have from here - http://www.usplastic.com/catalog/var...riant_id=64175
Spoils - do you not have any idle issues, such as a high-idle or other symptoms of a vacuum leak? With the breather on the driver's side crankcase, you would think the intake manifold would be able to suck in a decent amount of unmetered and unregulated air through the passenger side PCV.
I actually just went ahead and purchased some check valves like you have from here - http://www.usplastic.com/catalog/var...riant_id=64175
For the price, I would change them out once in a while so picking up spares isn't a bad idea.
I suspect that the amount of unmetered air from the driver's side breather is miniscule compared to that coming through the intake, which is why no one (with a MAF) has reported issues. Keep in mind during idle (high vacuum condition), the PCV valve actually flows less air.
Last edited by rcdash; Oct 5, 2008 at 05:32 PM.
I just got back from the track today and my intercooler all the way up my intake pipe were filled with oil. So much oil that I blew one of the silicone couplers off the MAF sensor to intake pipe joint. If it's not the turbo's seals where else could all this oil be comming from.
I would have posted an update sooner, but I had not driven my car since I posted this thread.
I would have posted an update sooner, but I had not driven my car since I posted this thread.
If the IC is filled, it's likely from the turbos (esp. given that you have catch cans for oil coming out of the crankcase, etc). Either because the seals are shot or something is pushing the oil out (too much oil pressure, not small enough oil restrictor, oil drainage issue due to crankcase pressure etc.). Some good ideas for addressing what you can in this thread... If all else fails, then turbo seal rebuild time...
Last edited by rcdash; Oct 5, 2008 at 07:08 PM.
I have a feeling that the oil is comming out of the breather on the drivers side valve cover and going into the intake. The right hand turns at the track are allowing oil to blow/be sucked out the breather and enter the intake behind the air filter.
Sorry I dont have much input but this is all new to me. Taking notes and learning. Its funny because my Z lets out random puffs of smoke alot of times at the same stop light. It only happenes when Im at a stop after driving but alot of times it when I get to a certain light after a hill or making a couple of repetiive turns. Now that I think about it its usually on left hand turns???????
Try that first before replacing the turbos, just to eliminate another possible cause.
Good luck Jet,
-George
Just got finished installing my KrantVent check valves and redo-ing all of my pcv hosing ...
The smaller valve on the pipe that connects to the plenum stops pressurised air when under boost from going back into the crankcase, and the larger valve guarantees that no un-metered air will enter the plenum while under vacuum ...
The smaller valve on the pipe that connects to the plenum stops pressurised air when under boost from going back into the crankcase, and the larger valve guarantees that no un-metered air will enter the plenum while under vacuum ...
I had a collapsed hose coming out of my catch can into a breather filter. I put a better hose and a new filter on and I havent puffed smoke in 2 months. Also I use to have to add oil every 3 days and the oil levell stays the same now.
Just got finished installing my KrantVent check valves and redo-ing all of my pcv hosing ...
The smaller valve on the pipe that connects to the plenum stops pressurised air when under boost from going back into the crankcase, and the larger valve guarantees that no un-metered air will enter the plenum while under vacuum ...
The smaller valve on the pipe that connects to the plenum stops pressurised air when under boost from going back into the crankcase, and the larger valve guarantees that no un-metered air will enter the plenum while under vacuum ...
Link to KrankVent ...
http://www.et-performance.com/turbo.html
Oh and the catch can is a topspeed item I picked up from ebay for $29 .... !!
Bringing this back up...
Spoils - do you not have any idle issues, such as a high-idle or other symptoms of a vacuum leak? With the breather on the driver's side crankcase, you would think the intake manifold would be able to suck in a decent amount of unmetered and unregulated air through the passenger side PCV.
I actually just went ahead and purchased some check valves like you have from here - http://www.usplastic.com/catalog/var...riant_id=64175
Spoils - do you not have any idle issues, such as a high-idle or other symptoms of a vacuum leak? With the breather on the driver's side crankcase, you would think the intake manifold would be able to suck in a decent amount of unmetered and unregulated air through the passenger side PCV.
I actually just went ahead and purchased some check valves like you have from here - http://www.usplastic.com/catalog/var...riant_id=64175