oil leak from avcs solenoid? 2019 sti

imprezatuo · 08-05-2019, 08:44 AM

Hello nasioc,

Found this oil leak from the driver side avcs solenoid. It's not major leak, only a couple drops between oil changes. Engine is completely stock, only 5000 miles when noticed this issue.

I know it's covered through warranty but I would like to have a more specific answer here before sending my car to the dealer... It looks like the oil is seeping from the two bolts with "8" on them(I circled them in the pic).

Any suggestions, advices appreciated! Thanks!!

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shadowsports · 08-05-2019, 10:11 AM

Nothing to say or discuss really. The "8" is the rated strength or hardness of the bolt.

Have you checked the oil level? (overfilled, etc)

New car, something leaking. Take it to the dealer. Maybe they weren't torqued to proper spec, maybe something else, but like you said, it's covered under warranty.

pyroshrek · 07-08-2023, 06:30 PM

Hi there, this thread is quite old and I'm not sure if this may be visited again but my issue is the same, oil dripping from the bolts on the underside of the driver-side AVCS module.

Phosoup253 · 09-12-2024, 12:21 AM

Bump. Me too same bolt and all on newly assembled shortblock. Initially thought I screwed up exhaust cam gear seal but still not quite sure. Thought someone might offer some insight before I pull the darn timing off to get the gear off and inspect.

Jedi03 · 09-12-2024, 04:01 PM

that pic to me looks like the solenoid o-ring is leaking...would recommend clean and double check as it could have dripped from somewhere else...

Phosoup253 · 09-12-2024, 09:16 PM

Cleaned and used a different o ring along with new gasket torqued 7ftlbs and still leak. Original gasket and o rings looks to be fine, just thought I’d mention that.
I can see oil off bolts furthest away from solenoid so looks like it’s coming off that end, not like the picture as I initially thought.
Exhaust cam seal maybe?

Phosoup253 · 09-12-2024, 11:28 PM

Starting to think there is an issue with my mating surface. Will try brand new oem gasket tomorrow but already tried two and same issue, dripping from opposite side valve furthest away from solenoid.

08-05-2019, 08:44 AM	#1
imprezatuo Scooby Newbie Member#: 490444 Join Date: Aug 2018 Location: boston Vehicle: 2019 wrx sti wrb	oil leak from avcs solenoid? 2019 sti Hello nasioc, Found this oil leak from the driver side avcs solenoid. It's not major leak, only a couple drops between oil changes. Engine is completely stock, only 5000 miles when noticed this issue. I know it's covered through warranty but I would like to have a more specific answer here before sending my car to the dealer... It looks like the oil is seeping from the two bolts with "8" on them(I circled them in the pic). Any suggestions, advices appreciated! Thanks!! * Registered users of the site do not see these ads.

07-08-2023, 06:30 PM	#3
pyroshrek Scooby Newbie Member#: 534822 Join Date: Jul 2023 Location: Salt Lake City Vehicle: 2013 Impreza WRX STi White	My issue as well! Hi there, this thread is quite old and I'm not sure if this may be visited again but my issue is the same, oil dripping from the bolts on the underside of the driver-side AVCS module.

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08-05-2019, 10:11 AM	#2
shadowsports Scooby Newbie Member#: 446364 Join Date: May 2016 Chapter/Region: BAIC Location: Nor Cal Vehicle: '17 STI LMT '08 LGT DGM / QSM	Nothing to say or discuss really. The "8" is the rated strength or hardness of the bolt. Have you checked the oil level? (overfilled, etc) New car, something leaking. Take it to the dealer. Maybe they weren't torqued to proper spec, maybe something else, but like you said, it's covered under warranty.

09-12-2024, 12:21 AM	#4
Phosoup253 Scooby Newbie Member#: 514882 Join Date: May 2020	Bump. Me too same bolt and all on newly assembled shortblock. Initially thought I screwed up exhaust cam gear seal but still not quite sure. Thought someone might offer some insight before I pull the darn timing off to get the gear off and inspect.

09-12-2024, 04:01 PM	#5
Jedi03 Scooby Specialist Member#: 491095 Join Date: Sep 2018 Chapter/Region: SWIC Location: New Mexico Vehicle: 2009 STi Blue Blue	that pic to me looks like the solenoid o-ring is leaking...would recommend clean and double check as it could have dripped from somewhere else...

09-12-2024, 09:16 PM	#6
Phosoup253 Scooby Newbie Member#: 514882 Join Date: May 2020	Cleaned and used a different o ring along with new gasket torqued 7ftlbs and still leak. Original gasket and o rings looks to be fine, just thought I’d mention that. I can see oil off bolts furthest away from solenoid so looks like it’s coming off that end, not like the picture as I initially thought. Exhaust cam seal maybe?

09-12-2024, 11:28 PM	#7
Phosoup253 Scooby Newbie Member#: 514882 Join Date: May 2020	Starting to think there is an issue with my mating surface. Will try brand new oem gasket tomorrow but already tried two and same issue, dripping from opposite side valve furthest away from solenoid.