Installing an Oil catch can on a RB25det - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Solidus311 · 05-20-2009, 12:44 PM

I have searched google and this forum itself, and found nothing other than other motors, or someone who has installed one incorrectly. I want to know if someone could make me a diagram on MS Paint or something explaining how to correctly install an Oil catch can.

I'm pretty sure I don't have any of the stock piping near the intake (the pipe that the stock valvecover lines go to, and the line that recirculates the stock bov) because of a custom intake pipe and a greddy plenum. I know something has to be routed to a PCV valve, right? Hope this is enough information for someone. Thanks in advance.

brokeAs240sx · 05-20-2009, 12:51 PM

1) Valve cover breather hole -> 1st hole in catch can.

2) Wherever you originally connected the valve cover breather hole hose to before -> 2nd hole in catch can.

* If you just vented the original hose, then leave the 2nd hole in the catch can vented. Not ideal, but works just fine.

No you don't route it to a pcv valve; you only route to an unpressurized source (i.e. before the turbo & after the maf ideally).

Solidus311 · 05-20-2009, 01:49 PM

hmm... okay thanks. Right now I just have the original hose going off randomly into a corner of my engine bay. So I guess I'll need to vent it with a little filter when I install the can.

HYPNOTIK · 05-20-2009, 05:41 PM

Here's how I had mine hooked up. From the valvecover to the catch, from the catch back into the intake pipe.

Solidus311 · 05-20-2009, 07:40 PM

Wow that looks way better then MS Paint. But I don't have any plumbing on my intake.

I guess I can rig up something or just vent it. Thank you, HYPNOTIK

flip3d · 05-20-2009, 07:45 PM

eww. missouri.

Darius · 05-22-2009, 01:36 PM

Search on NICOs RB forum. There are at least 6 threads that people have created because they thought their question was original. One thread is all-inclusive and will answer all of your questions.

HYPNOTIK · 05-22-2009, 11:26 PM

Quote:

Originally Posted by Solidus311

I don't have any plumbing on my intake.

I had to have a nipple welded in, if your running the stock intake you should have a spot.

05-20-2009, 12:44 PM	#1
Solidus311 Leaky Injector Join Date: May 2008 Location: MD Age: 37 Posts: 97 Trader Rating: (0) Feedback Score: 0 reviews	Installing an Oil catch can on a RB25det I have searched google and this forum itself, and found nothing other than other motors, or someone who has installed one incorrectly. I want to know if someone could make me a diagram on MS Paint or something explaining how to correctly install an Oil catch can. I'm pretty sure I don't have any of the stock piping near the intake (the pipe that the stock valvecover lines go to, and the line that recirculates the stock bov) because of a custom intake pipe and a greddy plenum. I know something has to be routed to a PCV valve, right? Hope this is enough information for someone. Thanks in advance. __________________ cardomain.com/ride/3113705

05-20-2009, 12:51 PM	#2
brokeAs240sx Nissanaholic! Join Date: May 2004 Location: Southern California Posts: 1,917 Trader Rating: (40) Feedback Score: 40 reviews	1) Valve cover breather hole -> 1st hole in catch can. 2) Wherever you originally connected the valve cover breather hole hose to before -> 2nd hole in catch can. * If you just vented the original hose, then leave the 2nd hole in the catch can vented. Not ideal, but works just fine. No you don't route it to a pcv valve; you only route to an unpressurized source (i.e. before the turbo & after the maf ideally). __________________ bew bews!

05-20-2009, 01:49 PM	#3
Solidus311 Leaky Injector Join Date: May 2008 Location: MD Age: 37 Posts: 97 Trader Rating: (0) Feedback Score: 0 reviews	hmm... okay thanks. Right now I just have the original hose going off randomly into a corner of my engine bay. So I guess I'll need to vent it with a little filter when I install the can. __________________ cardomain.com/ride/3113705

05-20-2009, 05:41 PM	#4
HYPNOTIK Zilvia Addict Join Date: Apr 2008 Location: Pisa, Italy Posts: 700 Trader Rating: (3) Feedback Score: 3 reviews	Here's how I had mine hooked up. From the valvecover to the catch, from the catch back into the intake pipe. __________________

05-20-2009, 07:40 PM	#5
Solidus311 Leaky Injector Join Date: May 2008 Location: MD Age: 37 Posts: 97 Trader Rating: (0) Feedback Score: 0 reviews	Wow that looks way better then MS Paint. But I don't have any plumbing on my intake. I guess I can rig up something or just vent it. Thank you, HYPNOTIK __________________ cardomain.com/ride/3113705

05-20-2009, 07:45 PM	#6
flip3d Zilvia FREAK! Join Date: Feb 2008 Location: Ft Lauderdale, FL Age: 33 Posts: 1,473 Trader Rating: (1) Feedback Score: 1 reviews	eww. missouri. __________________

05-22-2009, 01:36 PM	#7
Darius Zilvia Junkie Join Date: Mar 2005 Location: Chicago Posts: 346 Trader Rating: (5) Feedback Score: 5 reviews	Search on NICOs RB forum. There are at least 6 threads that people have created because they thought their question was original. One thread is all-inclusive and will answer all of your questions.

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