SR20DET Blow-by - Catch Can - etc Question pls help - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

es ar 20 · 01-19-2014, 09:29 AM

Hi everyone
This is my first post and my first S14!
I just purchased the car and I notice where there would typically be a catch can- there isn't! Just an empty fitting

Two of them to be exact. Forigive my ignorance on the matter but I have attached photos to illustrate my concern.
You'll notice two blue threadings on the right and left. Is it dangerous (or just dirty) to run the car as it is? And am I losing potential HP by not having those gases sans the oil re routed back into the system?

Thanks in advanced and again I apologize for possibly asking a stupid question.

bmxer882x · 01-19-2014, 11:06 AM

Yeah um thats bad. Look at a picture of how its supposed to be. How is the little black oem catch can drain hole? Is it wide open as well? How it is now youll have oil shooting on ur manifold. Huge fire hazard. Not sure what fittings those are for but I wouldnt drive it until you get both sides hooked up.

*brndck* · 01-19-2014, 11:23 AM

Yeah both those lines should be routed to a catch can. I would not drive the car around like that. Google some photos of the stock setup, and copy that. It looks like whoever you bought the car from removed their setup before they sold you the car.
Since they already converted to a/n fittings you will either have to so the same, or buy another stock valve cover with the stock fittings and go from there.

ultimateirving · 01-19-2014, 12:49 PM

The an fittings are nice so if I was you I'd try and find some hose and build it to fit. Get a catch can with the same an fittings and you'll be good to go

es ar 20 · 01-19-2014, 01:26 PM

Thanks so much guys for the responses! So both of those fittings should be routed to a catch can but what about the blow by? Should it just have an air breather and vented to the air or re routed back into the intake? Is there any benefits to either way?

ultimateirving · 01-19-2014, 01:42 PM

Don't use any breathers. But one of the lines needs to go to the suction pipe. Aka turbo intake between maf and turbo. That way it evacuates the crankcase at all times

es ar 20 · 01-19-2014, 02:42 PM

Ok. Now it has a an fitting behind the air intake before the turbo. Is that a bad place to have it routed? Currently I just have it capped off. The maf is on the opposite side on the piping near the intercooler. It is a 300zx maf

es ar 20 · 01-19-2014, 02:56 PM

The first pic is of the an fitting behind the intake filter the second is the maf by the intercooler and the third is the overhead shot where the pipes go on the maf side

MidwestMyriad · 01-19-2014, 03:00 PM

Kind of like this, but obviously yours would come from the existing fittings on the sides, the fitting you have capped currently should be your "vacuum" line from the catch can.

es ar 20 · 01-19-2014, 03:15 PM

Gotcha! Thanks so much for the response!!

es ar 20 · 01-19-2014, 03:16 PM

Would you reccomend a kit that I can purchase that will work on my current fitting set up?

Kaifd3s · 01-19-2014, 10:23 PM

Tamarac? WERD?

es ar 20 · 01-24-2014, 07:38 PM

Yea! I actually am in wpb now but moving to Tamarac next week!

01-19-2014, 09:29 AM	#1
es ar 20 Join Date: Jan 2014 Location: Tamarac Age: 35 Posts: 24 Trader Rating: (0) Feedback Score: 0 reviews	SR20DET Blow-by - Catch Can - etc Question pls help Hi everyone This is my first post and my first S14! I just purchased the car and I notice where there would typically be a catch can- there isn't! Just an empty fitting Two of them to be exact. Forigive my ignorance on the matter but I have attached photos to illustrate my concern. You'll notice two blue threadings on the right and left. Is it dangerous (or just dirty) to run the car as it is? And am I losing potential HP by not having those gases sans the oil re routed back into the system? Thanks in advanced and again I apologize for possibly asking a stupid question. Last edited by es ar 20; 01-19-2014 at 02:49 PM..

01-19-2014, 12:49 PM	#4
ultimateirving Zilvia FREAK! Join Date: Nov 2010 Location: arizona Age: 37 Posts: 1,521 Trader Rating: (1) Feedback Score: 1 reviews	The an fittings are nice so if I was you I'd try and find some hose and build it to fit. Get a catch can with the same an fittings and you'll be good to go __________________ Z32 with lq4 swap Desert Street Scene \|\| Dssevents.com

01-19-2014, 01:42 PM	#6
ultimateirving Zilvia FREAK! Join Date: Nov 2010 Location: arizona Age: 37 Posts: 1,521 Trader Rating: (1) Feedback Score: 1 reviews	Don't use any breathers. But one of the lines needs to go to the suction pipe. Aka turbo intake between maf and turbo. That way it evacuates the crankcase at all times __________________ Z32 with lq4 swap Desert Street Scene \|\| Dssevents.com

01-19-2014, 02:56 PM	#8
es ar 20 Join Date: Jan 2014 Location: Tamarac Age: 35 Posts: 24 Trader Rating: (0) Feedback Score: 0 reviews	The first pic is of the an fitting behind the intake filter the second is the maf by the intercooler and the third is the overhead shot where the pipes go on the maf side Last edited by es ar 20; 01-25-2014 at 08:55 PM..

01-19-2014, 03:00 PM	#9
MidwestMyriad Zilvia FREAK! Join Date: Feb 2010 Location: Traveling through time and space... Posts: 1,387 Trader Rating: (20) Feedback Score: 20 reviews	Kind of like this, but obviously yours would come from the existing fittings on the sides, the fitting you have capped currently should be your "vacuum" line from the catch can. __________________ @MMyriad

01-19-2014, 11:06 AM	#2
bmxer882x Zilvia Junkie Join Date: Apr 2013 Location: chandler Age: 31 Posts: 370 Trader Rating: (3) Feedback Score: 3 reviews	Yeah um thats bad. Look at a picture of how its supposed to be. How is the little black oem catch can drain hole? Is it wide open as well? How it is now youll have oil shooting on ur manifold. Huge fire hazard. Not sure what fittings those are for but I wouldnt drive it until you get both sides hooked up.

01-19-2014, 01:26 PM	#5
es ar 20 Join Date: Jan 2014 Location: Tamarac Age: 35 Posts: 24 Trader Rating: (0) Feedback Score: 0 reviews	Thanks so much guys for the responses! So both of those fittings should be routed to a catch can but what about the blow by? Should it just have an air breather and vented to the air or re routed back into the intake? Is there any benefits to either way?

01-19-2014, 02:42 PM	#7
es ar 20 Join Date: Jan 2014 Location: Tamarac Age: 35 Posts: 24 Trader Rating: (0) Feedback Score: 0 reviews	Ok. Now it has a an fitting behind the air intake before the turbo. Is that a bad place to have it routed? Currently I just have it capped off. The maf is on the opposite side on the piping near the intercooler. It is a 300zx maf

01-19-2014, 03:15 PM	#10
es ar 20 Join Date: Jan 2014 Location: Tamarac Age: 35 Posts: 24 Trader Rating: (0) Feedback Score: 0 reviews	Gotcha! Thanks so much for the response!!

01-19-2014, 03:16 PM	#11
es ar 20 Join Date: Jan 2014 Location: Tamarac Age: 35 Posts: 24 Trader Rating: (0) Feedback Score: 0 reviews	Would you reccomend a kit that I can purchase that will work on my current fitting set up?

01-19-2014, 10:23 PM	#12
Kaifd3s Zilvia Addict Join Date: Feb 2008 Location: Tamarac, Florida Age: 39 Posts: 694 Trader Rating: (16) Feedback Score: 16 reviews	Tamarac? WERD? __________________

01-24-2014, 07:38 PM	#13
es ar 20 Join Date: Jan 2014 Location: Tamarac Age: 35 Posts: 24 Trader Rating: (0) Feedback Score: 0 reviews	Yea! I actually am in wpb now but moving to Tamarac next week!