Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - Help- Oil leaking through AOS

neroman98 · 10-10-2019, 01:15 PM

Hi guys, I think it’s about time I take to the forums to see if anyone has any advice or experience to help me solve a problem I’m having with my FRS.

Ever since I installed the turbocharger onto my car (JDL Kit, G25-550 Turbo, 10lbs) I’ve had a lot of oil leak through my Verus Air Oil Separator (AOS) when I drive the car hard. Basically oil leaks from both the PCV and front crank port (as far as I can tell), so much oil that it overflows the AOS and leaks out of the exit hoses of the AOS. For those of you who are unfamiliar with the Verus AOS, it has two intake ports that connect to the PCV (it deletes the PCV valve and replaces it with an open port) and the front crank case port and has two exit ports which I’ve routed underneath the car so the air flow underneath the car acts as a vacuum to create suction for the AOS.

I have two other friends who are experiencing the same issue. One has the same turbo kit, turbo, and AOS as me and his car smokes and leaks oil through the AOS during highway pulls. The other has a GReddy T518Z turbo kit and Radium catch cans. His cans overflow and leak oil. The friend with the GReddy has also noticed some oil leaking through the timing cover, possibly due to increased pressure. The weirdest part of my friend with the GReddy turbo kit is that he was supercharged at first, switched to turbo and then started having this issue which means it might have to do with the turbo more than boost itself.

At first I feared my piston rings were bad or my ringlands had cracked. However, my compression test came back good. I considered that maybe the PCV delete or running the stock PCV caused the issue, but my friend with the GReddy kit had the STI PCV valve and still had this issue. Another theory is that when we installed our oil pans, we applied too much RTV and some may have clogged the oil pick up causing increased pressure in the system. However I find it hard to believe that all three of us put too much RTV and all clogged the oil pick up.

Does anyone have any ideas or experience with this issue? Thanks

10-10-2019, 01:15 PM	#1
neroman98 Member Join Date: Jul 2015 Drives: 2014 Scion FRS Track Build Location: Southern California Posts: 74 Thanks: 9 Thanked 13 Times in 9 Posts Mentioned: 1 Post(s)	Help- Oil leaking through AOS Hi guys, I think it’s about time I take to the forums to see if anyone has any advice or experience to help me solve a problem I’m having with my FRS. Ever since I installed the turbocharger onto my car (JDL Kit, G25-550 Turbo, 10lbs) I’ve had a lot of oil leak through my Verus Air Oil Separator (AOS) when I drive the car hard. Basically oil leaks from both the PCV and front crank port (as far as I can tell), so much oil that it overflows the AOS and leaks out of the exit hoses of the AOS. For those of you who are unfamiliar with the Verus AOS, it has two intake ports that connect to the PCV (it deletes the PCV valve and replaces it with an open port) and the front crank case port and has two exit ports which I’ve routed underneath the car so the air flow underneath the car acts as a vacuum to create suction for the AOS. I have two other friends who are experiencing the same issue. One has the same turbo kit, turbo, and AOS as me and his car smokes and leaks oil through the AOS during highway pulls. The other has a GReddy T518Z turbo kit and Radium catch cans. His cans overflow and leak oil. The friend with the GReddy has also noticed some oil leaking through the timing cover, possibly due to increased pressure. The weirdest part of my friend with the GReddy turbo kit is that he was supercharged at first, switched to turbo and then started having this issue which means it might have to do with the turbo more than boost itself. At first I feared my piston rings were bad or my ringlands had cracked. However, my compression test came back good. I considered that maybe the PCV delete or running the stock PCV caused the issue, but my friend with the GReddy kit had the STI PCV valve and still had this issue. Another theory is that when we installed our oil pans, we applied too much RTV and some may have clogged the oil pick up causing increased pressure in the system. However I find it hard to believe that all three of us put too much RTV and all clogged the oil pick up. Does anyone have any ideas or experience with this issue? Thanks