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jacobe38 · 04-18-2021, 02:29 AM

hello, I'll try and keep this succinct. looking for help on tracking down an issue or two. trying to figure out where the oil is coming from, because its all over, and i can't make sense of what the source issue is. ill get it eventually but i would love some input from (hopefully) more experienced folks.

full album: https://imgur.com/a/nMjv6vW

2014 brz, 65k. NA, headers and e85 tune, but in process of installing JRSC kit
car is tracked a lot. ran find last season. no noticeable oil consumption. but i changed oil often and an accusump could mask this
doing Direct injector service
found the following concerning things

oil was found:

all around the PCV valve area. wettest just below the PCV valve in areas circled (not sure what to call it exactly) oil residue also in areas above PCV where it would not flow "uphill". if its vapor laden blowby gasses escaping from the PCV tubing, perhaps thats explaining the spread?

oil residue also found around the breather hose on the top of the intake manifold. i had wiped most of it off here already. it was fairly damp.

oil residue also found on back of intake manifold, and on intake manifold underside as well (not a whole lot here, but noticeable)

lots of oil residue inside intake manifold. each port pretty much looked like this. the inner walls are not 'wet' despite looking like droplets but can be wiped off with a rag. the gasket area is definitely wet. how normal is this? certainly does not look ideal - but this is my first time pulling an intake manifold

POV from throttle body looking inside intake manifold, you can see what appears to be oil splatter pattern as if oil was flowing into manifold from air intake. or maybe coming in from pcv hose and just making an instant U turn to hit the back wall?

breather hose port in the air intake tube from driver front PCV(CCV?) system, showing oil leaking into it, and patterns of it being drawn in

pics of catch can that was on the car when i bought it (bought the car last year) hose to manifold was slightly kinked but not shut as far as i know. the hose going to PCV valve did not seem like the best connection (hose was cut crooked) never more than a tablespoon of oil in the catch can after several track days and hundreds of miles.

all intake ports looked like this pretty much

also one direct injector tip was oily

what does it all mean? thanks for any input. i have not done any compression or leakdown tests. until now no reason to even consider one

I'm thinking my crankcase pressures, meaning vacuums, are wonky. I am not sure why there would be oil leaking into the air intake like that unless for some reason that is pulling a strong vacuum, which as far as i know isn't supposed to happen

maybe accusump is causing overfilling and resulting in a lot of extra blow by?

could it be possible that oem pcv valve has failed?

04-18-2021, 02:29 AM	#1
jacobe38 @slothbrz on IG Join Date: Jul 2020 Drives: Track BRZ - Supercharged Location: MI Posts: 135 Thanks: 25 Thanked 56 Times in 28 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Oil Leak / PCV Puzzle hello, I'll try and keep this succinct. looking for help on tracking down an issue or two. trying to figure out where the oil is coming from, because its all over, and i can't make sense of what the source issue is. ill get it eventually but i would love some input from (hopefully) more experienced folks. full album: https://imgur.com/a/nMjv6vW 2014 brz, 65k. NA, headers and e85 tune, but in process of installing JRSC kit car is tracked a lot. ran find last season. no noticeable oil consumption. but i changed oil often and an accusump could mask this doing Direct injector service found the following concerning things oil was found: all around the PCV valve area. wettest just below the PCV valve in areas circled (not sure what to call it exactly) oil residue also in areas above PCV where it would not flow "uphill". if its vapor laden blowby gasses escaping from the PCV tubing, perhaps thats explaining the spread? oil residue also found around the breather hose on the top of the intake manifold. i had wiped most of it off here already. it was fairly damp. oil residue also found on back of intake manifold, and on intake manifold underside as well (not a whole lot here, but noticeable) lots of oil residue inside intake manifold. each port pretty much looked like this. the inner walls are not 'wet' despite looking like droplets but can be wiped off with a rag. the gasket area is definitely wet. how normal is this? certainly does not look ideal - but this is my first time pulling an intake manifold POV from throttle body looking inside intake manifold, you can see what appears to be oil splatter pattern as if oil was flowing into manifold from air intake. or maybe coming in from pcv hose and just making an instant U turn to hit the back wall? breather hose port in the air intake tube from driver front PCV(CCV?) system, showing oil leaking into it, and patterns of it being drawn in pics of catch can that was on the car when i bought it (bought the car last year) hose to manifold was slightly kinked but not shut as far as i know. the hose going to PCV valve did not seem like the best connection (hose was cut crooked) never more than a tablespoon of oil in the catch can after several track days and hundreds of miles. all intake ports looked like this pretty much also one direct injector tip was oily what does it all mean? thanks for any input. i have not done any compression or leakdown tests. until now no reason to even consider one I'm thinking my crankcase pressures, meaning vacuums, are wonky. I am not sure why there would be oil leaking into the air intake like that unless for some reason that is pulling a strong vacuum, which as far as i know isn't supposed to happen maybe accusump is causing overfilling and resulting in a lot of extra blow by? could it be possible that oem pcv valve has failed? Last edited by jacobe38; 04-18-2021 at 01:37 PM.