LT4 PCV - Re-Design

SOCAL.M6.ZLE · 09-22-2022, 04:46 PM

Hey Team... As most of you LT4 owners have already found out... the stock PCV system is not effective at keeping oil out of the blower... I was SHOCKED at how saturated my 2,200 mile blower looked!!! With my motor out of the car now, Katech cast covers on hand, and a MM catch can, i am wondering what other changes people have made to improve the system?

Has anyone removed the "black box" oil separator? Does the CC replace this by design? Open to make any changes that make sense with the motor in pieces...

Camaro1973 · 09-22-2022, 06:00 PM

Quote:

Originally Posted by SOCAL.M6.ZLE

Hey Team... As most of you LT4 owners have already found out... the stock PCV system is not effective at keeping oil out of the blower... I was SHOCKED at how saturated my 2,200 mile blower looked!!! With my motor out of the car now, Katech cast covers on hand, and a MM catch can, i am wondering what other changes people have made to improve the system?

Has anyone removed the "black box" oil separator? Does the CC replace this by design? Open to make any changes that make sense with the motor in pieces...

Add a catch can bud. The black box is for fresh air from intake tube and one side of the cover for crankcase. Catch can is going to recirculate via vacuum and catch the oil.

Get a MM if your adding any sort of power as it will remove the PCV completely from the base of the SC. (wild can) Or the elite can, both good, but i like the MM better myself.

Crusher Camaro · 09-22-2022, 06:55 PM

He already has one to install with his mods.

Socal,
I installed the MM and left the oem system in place for the time being.
When I install my Motion Race Works valve covers, I will be installing one of there catch cans and disabling the OEM (remove the lines and plug the can). I will leave the can and the one line that goes to the oil pan as I cannot find a plug for the oil pan tube. I will also remove the MM can. The dual valve cover dash 8-10 lines to the motion system will be more than enough ventilation and will be more than the oem and MM system.
Yes, I give up the vacuum side to pull out of the engine with the MM system, but this isn't my daily driver. it gets driven hard and oils changed more than others.

one down side, I may end up with more smell after the car shuts off as the crane case is open the atmosphere through the can/filter.

Gunkk · 09-22-2022, 08:05 PM

Your MM can should serve you well without having to mess with the stock system.

Camaro1973 · 09-22-2022, 10:35 PM

Quote:

Originally Posted by Crusher Camaro

He already has one to install with his mods.

Socal,
I installed the MM and left the oem system in place for the time being.
When I install my Motion Race Works valve covers, I will be installing one of there catch cans and disabling the OEM (remove the lines and plug the can). I will leave the can and the one line that goes to the oil pan as I cannot find a plug for the oil pan tube. I will also remove the MM can. The dual valve cover dash 8-10 lines to the motion system will be more than enough ventilation and will be more than the oem and MM system.
Yes, I give up the vacuum side to pull out of the engine with the MM system, but this isn't my daily driver. it gets driven hard and oils changed more than others.

one down side, I may end up with more smell after the car shuts off as the crane case is open the atmosphere through the can/filter.

I don't think you understand what I am saying...

The box needs to stay in place for clean air which enters via intake, into passenger valve cover.

If you remove this, then you need to make sure filtered air enters the crankcase somehow.

swisstyphoon · 09-23-2022, 12:35 AM

Check out this new product from LME
https://latemodelengines.com/ls-bill...luN24B9.PMjQnJ

Crusher Camaro · 09-23-2022, 03:48 PM

Quote:

Originally Posted by Camaro1973

I don't think you understand what I am saying...
The box needs to stay in place for clean air which enters via intake, into passenger valve cover.
If you remove this, then you need to make sure filtered air enters the crankcase somehow.

I follow you, don't disagree, just saying he already has a MM to install.

When I install the motion setup, there is not vacuum on the crank case.
the motion setup allows the engine to breath through a filters catch can pressure out and fresh air in as needed. pretty much making the OEM system not needed for my application.

09-22-2022, 04:46 PM	#1
SOCAL.M6.ZLE Having FUN in the SUN... Drives: 2022 M6 ZL1 1LE Join Date: Jan 2022 Location: San Diego CA Posts: 1,049	LT4 PCV - Re-Design Hey Team... As most of you LT4 owners have already found out... the stock PCV system is not effective at keeping oil out of the blower... I was SHOCKED at how saturated my 2,200 mile blower looked!!! With my motor out of the car now, Katech cast covers on hand, and a MM catch can, i am wondering what other changes people have made to improve the system? Has anyone removed the "black box" oil separator? Does the CC replace this by design? Open to make any changes that make sense with the motor in pieces... __________________ 2022 M6 ZLE: Katech CNC Ported Blower + Ported Heads + 103mm TB + Oil Pump + C5R Chain + Valve Covers + Coil Relocation TSP VVT and DoD Delete Covers + LME Chain Guide + DSX Billet Lid + ATI Damper + 9.17" Lower + 2.4" Upper + MM Wild CC Coated ARH + AWE Touring + Magnaflow Center X + E85 + MSD Coils + Banks iDash + JMS Booster + Synergy Fender Tank ALL the RED Rear End BMR Goodies + JRE Terminator Cam Package + Remote Tuning and Moral Support from TED @ JRE BMR Motor Mounts + DMS Front HX + FIC 30's + APEX SM.10's + 305/345 R888R's = 770rwhp 785rwtq @E50 13.5psi

09-23-2022, 12:35 AM	#6
swisstyphoon Former GM Technician Drives: 2018 ZL1 A10, 06 Silverado Duramax Join Date: Sep 2009 Location: Switzerland Posts: 341	Check out this new product from LME https://latemodelengines.com/ls-bill...luN24B9.PMjQnJ __________________ 2018 Camaro ZL1 A10 Rotofab Big Gulp, Nick Williams 103, Magnuson 2650, 9.17" (14%) lower, 90mm upper, Vengeance Racing Heads (LME) Cam Package (Cammotion Stage 1), Johnson Lifters, JMS Voltage Booster, Lingenfelter high flow check valve, BBK shorty headers, Custom 2.75" down pipes, Gesi Gen2 high flow cats, MM catch can 791whp, 772ft-lbs SAE Just added 30% XDI Injectors, LPE big bore hpfp, Flex fuel. Elite tuning, results coming soon. 2006 Silverado Duramax Diesel MPI Compound Turbo 40% over Injectors Efi Live DSP5 Tuning Follow me on Instagram: Swisstyphoon1980

09-22-2022, 06:55 PM	#3
Crusher Camaro Drives: 19 ZL1 Join Date: Jan 2019 Location: Tampa Fl Posts: 92	He already has one to install with his mods. Socal, I installed the MM and left the oem system in place for the time being. When I install my Motion Race Works valve covers, I will be installing one of there catch cans and disabling the OEM (remove the lines and plug the can). I will leave the can and the one line that goes to the oil pan as I cannot find a plug for the oil pan tube. I will also remove the MM can. The dual valve cover dash 8-10 lines to the motion system will be more than enough ventilation and will be more than the oem and MM system. Yes, I give up the vacuum side to pull out of the engine with the MM system, but this isn't my daily driver. it gets driven hard and oils changed more than others. one down side, I may end up with more smell after the car shuts off as the crane case is open the atmosphere through the can/filter.

09-22-2022, 08:05 PM	#4
Gunkk Thank you Al Oppenheiser! Drives: Red Hot A10 ZL1 Convertible Join Date: Jun 2017 Location: Sarasota, FL Posts: 4,975 View My Garage	Your MM can should serve you well without having to mess with the stock system.

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