Oil Catch Can Question

PX370GT · 04-27-2017, 07:01 PM

Installing my dual catch cans today and noticed the intake tube has a hose after the MAF that is connected to the crankcase.

My question is: Does that intake tube hose also perform the same function of as the intake manifold hose in the middle? I.e. does it also vacuum the excess crankcase fumes and recirculate it?
If so, why is there no catch can for it?

(Curious about the hose in red. Blue hose is regular catch can setup.)
Thanks.

johnwiki · 05-17-2017, 08:39 AM

The Intake manifold hose is how the crankcase gunk gets from the crankcase to the manifold, the red hose youre asking about is positive air to push that gunk up and out.

Jayhovah · 05-17-2017, 08:49 AM

I like the mounting location of those cans... are they bolted down other locations than what I can see in the picture? Looks like each one only has one bolt on either side of the radiator support.

PongSanity · 05-17-2017, 03:43 PM

just cap off the intake. your lines in blue are correct. being that they're closed catch cans, are they baffled? are you gonna delete the pcv's or just leave them installed?

04-27-2017, 07:01 PM	#1 (permalink)
PX370GT Base Member Join Date: Jun 2016 Location: CA Posts: 1 Drives: 09 370z Rep Power: 8	Oil Catch Can Question Installing my dual catch cans today and noticed the intake tube has a hose after the MAF that is connected to the crankcase. My question is: Does that intake tube hose also perform the same function of as the intake manifold hose in the middle? I.e. does it also vacuum the excess crankcase fumes and recirculate it? If so, why is there no catch can for it? (Curious about the hose in red. Blue hose is regular catch can setup.) Thanks.

05-17-2017, 08:39 AM	#2 (permalink)
johnwiki Base Member Join Date: Oct 2013 Location: California Age: 32 Posts: 66 Drives: 2011 Gun Metallic Z Rep Power: 11	The Intake manifold hose is how the crankcase gunk gets from the crankcase to the manifold, the red hose youre asking about is positive air to push that gunk up and out. __________________ Mods: Z1 CAI, Fast Intentions HFC + Cat Back, 4.08 Gears + VLSD Swap, Southbend DxD Clutch+lightweight flywheel = 310 HP 285 ft/lbs

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05-17-2017, 03:43 PM	#4 (permalink)
PongSanity Enthusiast Member Join Date: Jul 2014 Location: Virgin Islands Posts: 261 Drives: '09 G37s KH3 6MT Rep Power: 10	just cap off the intake. your lines in blue are correct. being that they're closed catch cans, are they baffled? are you gonna delete the pcv's or just leave them installed?