Catch Can (with breather) No vacuum an issue? - - Infiniti G35 & G37 Forum Discussion |
Show Your Support Become A Premier Member

    > >
  • Reload this Page >
    • Catch Can (with breather) No vacuum an issue?

Catch Can (with breather) No vacuum an issue?

Thread Tools Rate Thread
Old 08-10-2015, 12:29 AM
Registered User
Thread Starter
Join Date: Jul 2015
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Catch Can (with breather) No vacuum an issue?

I've been working on my G for a while and have noticed a decent amount of oil in the plenum (as expected). I have a catch can with a breather, and want to install the full system (by joining passenger and driver side PCV's to the can) then plug the holes on the plenum and intake. So no oil or vapours enter the engine.

Now from what I've researched the crankcase relies on the vacuum caused by the intake system to pull corrosive gasses as well as pressure out. If I install this full catch can setup there will be no vacuum pulling the gasses out, and only pressure from combustion pushing the gasses out (which isn't very strong). My question lies on what this means for the life of the engine? Sure it wont be burning oil anymore, but might I run into other issues down the line?

I know people are running these setups, but I can't find the details.

*Yes I have searched for an answer everywhere*
Old 08-15-2015, 10:24 PM
Registered User
Join Date: Nov 2004
location: Nutley, NJ
Posts: 92
Thanked 9 Times in 9 Posts
The purpose of an open to atmosphere breather is to lower the crankcase pressure or stop excessive amounts of vapors from entering the intake. It's probably only really a necessity on FI cars as positive manifold pressure blocks off the pcv valve.

I doubt your car has excessive crank case pressure so I would recommend you leave your CCV system closed. Blow-by gasses are the nastiest thing emitted from an engine and you'll quickly learn how they can find there way into the cabin and literally make you sick. Plus, as you stated, the fresh air supply is probably a good thing for a street car that sees light throttle majority of the time.

If you car concerned about oil entering the intake, your best bet is to find an oil separater or "catch can" without a breather.

Related Topics
Thread Thread Starter Forum Replies Last Post
FS: 2005 IP sport package g35 coupe VERY CLEAN! linedr89 G35 Cars 2 08-17-2015 06:11 PM
06 6mt coupe misfiring 😓 ghost_g35 Engine, Drivetrain & Forced-Induction 2 08-07-2015 11:31 AM
Oil Catch Can confusion lemmy999 G35 Sedan V35 2003-06 0 07-25-2015 01:13 PM

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -4. The time now is 04:58 PM.

Copyright ©2002 - 2017, All Rights Reserved. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in:

Related pages

splash guards for cars worth itshow me the parts kybthrottle response lagate rotors reviewwhat percent tint is legal in nysupertone hornshow do you tint headlightsskip barber discountuprev tuner03 infiniti g35 coupe specssub frame bushingsssr professor sp3bolt pattern 5x4.5bridgestone turanza el42 mileage ratingdrilled vs slotted rotorsinvidia exhaust g35carputer touch screenhks true dual exhaust 350zcalifornia tint lawsmy engine is making a knocking noiseinvo tires reviewautozone burlington vtavant garde m310mrr wheels for saleg37 sedan forumengine threw a rod2002 nissan maxima camshaft position sensortucked engine bayrubbing noise while drivingvossen vvscarbon fibre wrap interiorknock sensor replacement costxm2 radioifs infinitihow to put an auxiliary port in your car350z mileageengine overheating radiator coldscion fr s sedanforgestar f14 19blox shift knob2006 g35side branch resonatorshks hi power exhaust 350zoil for infiniti i35infinity of scottsdalerims for acura tl2007 g37scorbeau seatsphilips germany d2s 35w 85122pros and cons of infiniti g35engine and transmission swap costillest license plate frameenergy suspension bushingsvvt how it worksdockstubzturbo g37 sedanm5 dynomy car shakes when i drive itpioneer avh p4100bc racing coilovers squeaking350z exhaust manifold370z lug nutsticking noise while drivingalpine pxe h650pioneer avic-z120bt manualfix crack in dashboardbbs lm rims for salebuy castrol edge 5w-30adr m sport wheelslm rep wheelstint law in vacars similar to infiniti g35g35 hks hi power exhaustg35 coupe spoilerrx350 vs rdxsigns of a bad transmission mount4d vinyl wrapwindshield washer nozzle not working