PCV Valve Replacement with STI Valve - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

apelpapa · 03-23-2016, 11:10 PM

I just installed the SPD kit on my car and I picked up a STI PCV Valve since a lot of people were recommending replacing it since the stock one is plastic. However where I would assume the PCV Valve is installed is right behind the intake manifold where the passenger side hose is going to from the intake manifold, right? Mine is metal (maybe the inside piece is plastic?)
So my question is am I looking at the right thing to replace? If so did you just use a socket with an angler to replace it, because it is kind of a pain where it sits right now?
I'm sorry if this isn't in the right section. I figured it would be with forced induction.
I've tried to google it but all I come up with is replacing the small plastic elbow, but that was hollow and replace with a straight metal tube during installation.

GsxrMe · 03-23-2016, 11:13 PM

Delete it and install a catchcan.

apelpapa · 03-23-2016, 11:14 PM

Quote:

Originally Posted by GsxrMe

Delete it and install a catchcan.

I'm planing on installing a catch can in the summer, just holding off a little to recoup a little bit of funds

GsxrMe · 03-24-2016, 08:31 PM

I know how you feel but catch can and oilcooler is a must. The engine will take a beating even if it's a 7psi basemap tune with DD car.

I had oil leaks from anywhere the damn pressure could get out during WOT. Pcv delete, catchcan fixed it real fast.

Bykov · 03-24-2016, 08:36 PM

The JRSC instruction manual has instructions for installing it. That would be a good place to start. It has specific placement. I would go into why placement is important but I don't feel like looking through the KWSC thread for where it's mentioned. Hope that helps.

apelpapa · 03-24-2016, 11:01 PM

Quote:

Originally Posted by Bykov

The JRSC instruction manual has instructions for installing it. That would be a good place to start. It has specific placement. I would go into why placement is important but I don't feel like looking through the KWSC thread for where it's mentioned. Hope that helps.

Thanks for that, they installed a one way check one the hose I was thinking about, so I'll just swap the valve at the end of it. Thank you!

apelpapa · 03-24-2016, 11:03 PM

Quote:

Originally Posted by GsxrMe

I know how you feel but catch can and oilcooler is a must. The engine will take a beating even if it's a 7psi basemap tune with DD car.

I had oil leaks from anywhere the damn pressure could get out during WOT. Pcv delete, catchcan fixed it real fast.

Ya, I'll probably order the dual radiums next week and just install the valve in the middle of the line temporarily until they come in

The Racers Line · 03-25-2016, 12:04 AM

Quote:

Originally Posted by apelpapa

I just installed the SPD kit on my car and I picked up a STI PCV Valve since a lot of people were recommending replacing it since the stock one is plastic. However where I would assume the PCV Valve is installed is right behind the intake manifold where the passenger side hose is going to from the intake manifold, right? Mine is metal (maybe the inside piece is plastic?)
So my question is am I looking at the right thing to replace? If so did you just use a socket with an angler to replace it, because it is kind of a pain where it sits right now?
I'm sorry if this isn't in the right section. I figured it would be with forced induction.
I've tried to google it but all I come up with is replacing the small plastic elbow, but that was hollow and replace with a straight metal tube during installation.

You don't replace the stock one because it is plastic, you replace it because it was never meant to see boost, so it opens up(under even 1psi from my testing) and lets boost into the crank case (bad)

A 19mm deep socket and a medium extension will get the old one out (it will be tight, but comes out) Screw the new STI one in by hand and then tighten down with the socket/ratchet.

zkv476 · 03-25-2016, 03:15 AM

Yea idk who said the stock PCV is plastic; it is very much metal. I put in the one from the FA20F WRX.

Any reason they say to use the STI one? Is it better? Didn't even realize those were compatible.

Sportsguy83 · 03-25-2016, 08:53 AM

Quote:

Originally Posted by zkv476

Yea idk who said the stock PCV is plastic; it is very much metal. I put in the one from the FA20F WRX.

Any reason they say to use the STI one? Is it better? Didn't even realize those were compatible.

Shouldn't be much difference. WRX/STI, both were made to see boost, so they both work for the application.

spitfire481 · 03-25-2016, 02:48 PM

its definitely metal. i drilled out the check valve in mine so it was wide open for my atmospheric vent catch can.

GsxrMe · 03-25-2016, 06:31 PM

Quote:

Originally Posted by spitfire481

its definitely metal. i drilled out the check valve in mine so it was wide open for my atmospheric vent catch can.

BINGO

Yep. Blow by creates presure in the case. If the valve is shut over boost then the crankcase can't let the presure out. The front case vent isn't enough.

Put a cap plug on your intake plenum and vent to atmosphere. a filter popped on the barb is better than back presure. And BOOM!

When I boosted my Busa, I left my crackcase vent wide open. Not worth it not to.

apelpapa · 03-26-2016, 12:36 AM

Ya, I'm not sure were I heard that it was plastic. Thanks for the replies guys.

mrk1 · 03-26-2016, 09:15 PM

I run a VTA can and just replaced the valve with a hose fitting of the correct threads, boom done.

I did it just for simplicity, one less thing to fail.

03-23-2016, 11:10 PM	#1
apelpapa Member Join Date: Mar 2014 Drives: 2013 SPD Black FR-S Location: Parker, CO Posts: 76 Thanks: 7 Thanked 6 Times in 6 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	PCV Valve Replacement with STI Valve I just installed the SPD kit on my car and I picked up a STI PCV Valve since a lot of people were recommending replacing it since the stock one is plastic. However where I would assume the PCV Valve is installed is right behind the intake manifold where the passenger side hose is going to from the intake manifold, right? Mine is metal (maybe the inside piece is plastic?) So my question is am I looking at the right thing to replace? If so did you just use a socket with an angler to replace it, because it is kind of a pain where it sits right now? I'm sorry if this isn't in the right section. I figured it would be with forced induction. I've tried to google it but all I come up with is replacing the small plastic elbow, but that was hollow and replace with a straight metal tube during installation.

03-23-2016, 11:13 PM	#2
GsxrMe Senior Member Join Date: Jul 2015 Drives: Late 2014 Subaru BRZ Location: Cape Coral, FL Posts: 557 Thanks: 20 Thanked 183 Times in 139 Posts Mentioned: 5 Post(s) Tagged: 2 Thread(s)	Delete it and install a catchcan. __________________ 2014 Subaru BRZ FBM Turbokit: GTX3076R - ECUTEK HRI FlexFuel tune - FBM 3" Turboback Exhaust - 550cc Injectors - Walbro 485 Fuel Pump - 4bar Map Sensor - FBM Oil Pan - ACT SB7-XTSS - AMSOIL all fluids - Forester XT Oil Cooler - Cusco engine, trans mounts - Whiteline rear differential bushings - Perrin shifter bushing - Firehawk 235/45/17 - AEM Failsafe

03-24-2016, 08:31 PM	#4
GsxrMe Senior Member Join Date: Jul 2015 Drives: Late 2014 Subaru BRZ Location: Cape Coral, FL Posts: 557 Thanks: 20 Thanked 183 Times in 139 Posts Mentioned: 5 Post(s) Tagged: 2 Thread(s)	I know how you feel but catch can and oilcooler is a must. The engine will take a beating even if it's a 7psi basemap tune with DD car. I had oil leaks from anywhere the damn pressure could get out during WOT. Pcv delete, catchcan fixed it real fast. __________________ 2014 Subaru BRZ FBM Turbokit: GTX3076R - ECUTEK HRI FlexFuel tune - FBM 3" Turboback Exhaust - 550cc Injectors - Walbro 485 Fuel Pump - 4bar Map Sensor - FBM Oil Pan - ACT SB7-XTSS - AMSOIL all fluids - Forester XT Oil Cooler - Cusco engine, trans mounts - Whiteline rear differential bushings - Perrin shifter bushing - Firehawk 235/45/17 - AEM Failsafe

03-25-2016, 03:15 AM	#9
zkv476 Senior Member Join Date: May 2014 Drives: 2014 SWP BRZ, MT Location: New Jersey Posts: 240 Thanks: 11 Thanked 140 Times in 90 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	Yea idk who said the stock PCV is plastic; it is very much metal. I put in the one from the FA20F WRX. Any reason they say to use the STI one? Is it better? Didn't even realize those were compatible. __________________ The answer is racecar. Always.

03-25-2016, 02:48 PM	#11
spitfire481 Senior Member Join Date: Mar 2013 Drives: 2JZ FRS Location: Pure Automotive Performance Posts: 1,378 Thanks: 97 Thanked 1,354 Times in 621 Posts Mentioned: 27 Post(s) Tagged: 2 Thread(s)	its definitely metal. i drilled out the check valve in mine so it was wide open for my atmospheric vent catch can. __________________ Pure Automotive Performance MoTeC Build Thread @spitfire481

03-24-2016, 08:36 PM	#5
Bykov Senior Member Join Date: Apr 2014 Drives: 2014 Monogram FR-S Whiteout Location: JBLM, Washington State Posts: 101 Thanks: 157 Thanked 69 Times in 48 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	The JRSC instruction manual has instructions for installing it. That would be a good place to start. It has specific placement. I would go into why placement is important but I don't feel like looking through the KWSC thread for where it's mentioned. Hope that helps.

03-26-2016, 12:36 AM	#13
apelpapa Member Join Date: Mar 2014 Drives: 2013 SPD Black FR-S Location: Parker, CO Posts: 76 Thanks: 7 Thanked 6 Times in 6 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Ya, I'm not sure were I heard that it was plastic. Thanks for the replies guys.

03-26-2016, 09:15 PM	#14
mrk1 Senior Member Join Date: Mar 2013 Drives: Sterling BRZ Ltd Location: New England Posts: 1,702 Thanks: 403 Thanked 1,389 Times in 671 Posts Mentioned: 20 Post(s) Tagged: 2 Thread(s)	I run a VTA can and just replaced the valve with a hose fitting of the correct threads, boom done. I did it just for simplicity, one less thing to fail. __________________ The Build Thread GT28RS - eBoost2 - 3.91 Final Drive - Supra LSD

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