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It's still under warranty. Why didn't you take it to Subaru?

The garage is coming along good brother.

I own a 2020 work rally blue STI and it is all stock. You are right. The car is fun stock. Subies forever.

Blue sounds like a very nicely built EJ Subaru. The white one sounds like a Honda from Fast and the Furious lmao. Should have bought a Honda lol 😂

Closed deck, forged internals and ELH fs. Also reliability mods

Pre ignition 100% , better check your octane , or your tuner. Rods might even be bent. Just blew my 1.8 Miata on 11lbs of boost , stock internals blew out ring lands also. Only did 3 pulls to redline dialing my fuel mixture on dyno .Didn't even hear any detonation , but that's what caused it. I just got it back together after a month all forged parts. Should be good for 600hp if tuned correctly ? I've got it dialed down to 6lbs. , until I put at least a thousand miles on it.

lmao typical suby

Its an ej there's always problems.

RA block is nothing special. Unfortunately this can happen but usually when you're over boosting. This also happened to me on the dyno. There was no knock event or a drop in DAM. What happens is the ring expands beyond the gap. The ring has no place to go but upwards. I purchased an AIG750 as a replacement.

RA block or not, the problem is the ring placement on the piston. The Subaru pistons and top compression ring is super high on the piston. The aftermarket pistons move that top ring down quite a bit. Why is Subaru not fixing it? Well it has everything to do with EU and EPA and carbon burning. Wish they would stop hyping the RA block. Also noted just slapping forged pistons into the block is an option but the piston to wall clearance is important. That's why you see . 25 over bore pistons in IAG blocks. They make the piston to wall clearance perfect. Just buy the IAG short block.

Ya the RA hyper is bad. IAG or go home.

I had ringland failure. People think its from abusing the car but it can happen from normal spirited driving. The type ra pistons are not stronger its a myth, made of the same material. I drove knowing i had ringland failure for 3k miles trying to have a critical engine failure and it never happened and the cylinder walls were perfectly fine when i opened it up. I bought some drop in pistons and a ball hone and called it a day and it held up for 5k miles. Sold the car 2 weeks ago to a dealer. Subaru made me not want another gas car i drive a tesla now because those have like 2 moving parts

Ringland failure is usually caused by detonation which can commonly happen when loading up the car at low RPMs. Think accelerating in 6th gear (hitting full boost at 3,000 rpms). So even if you aren't beating on your car, you can accidently cause this type of failure.

low key worring with the dogs out is lively

love the car

bro noo why did it have to do the piston-like that, let me know I would love to help you out man in the rebuild I decent in an engine bay

piston rings

Cool vid. just wanted to ask a quick question for future preference. Before your ring land failure, Did you have a pro-tune or a cobb OTS stage map tune, when you installed the air intake?

I hope I don’t get this problem. I’m at 43k miles & completely stock motor. It’s my daily too lol

Bummer about the ringland, but it happens with OEM pistons and a little bit of detonation. Depending on your power goals, having your stock block machined, with new forged pistons/aftermarket rods should be able to hold a lot of power, at a decent price point. And thanks for your business! -Mark

should’ve done a leak down test before

Good learning for you. If you owned a leak down tester that would have isolated the issue and located it. At TDC on cylinder 4, you can shoot air into the cylinder and it would have leaked past the ring and into the crankcase, pop the oil cap off and you would have heard the air escaping from that point which tells you the failure is in the bottom in not the top.

At 30k mi the car should still be under warranty At least the drivetrain is

Stock EJ ring walls, sadly, are pretty thin. So even the slightest bit of detonation is no good

Shoutout @SMEEDIA for the Valve Grind Compound tip. Makes a world of a difference when removing those cam gear bolts!!

I had a similar situation with my civic si. Motor pulled and it had crank walk. Previous owner must have put my car through the ringer

☠️ nice knowing you stock motor. Don’t let the door hit you in the ass on the way out.

Yeh ive seen ringland failure on cylinder 2 on the same motor along with cylinder 4 Im doin wider ring gaps heard of people doing that preventing ringland failure

What oil was you using and how often was your intervals? Also was it on a protune or ots tune? Im thinking it ran lean on that cylinder or Oil rings might got gunked up

I know what's wrong with it, it ain't got no gas in it! Jk...but hey at least piston 4 didn't become the next Saturn V Rocket...

The 19'+ RA stuff isn't any stronger than previous years. Slightly different machining on the pistons, but that's it. I have a 2016. FBO, tune pending. I'd say give the 750 block from IAG some thought.

I aint nervous much about by 21k 21' STI blowing (Sweating as I watch this video). If mine goes, I'll bite the bullet and go get me an IAG 750 Long Block.

The only thing I can think of is the previous owner. That is a lot of damage for 30K miles. Most I've seen fail around 80K. I eventually want to go closed deck with forged rods and pistons. Would be dope to see you build it yourself. Good luck!

How were you driving this car? Non-stop full throttle? Dam

New sub! Ready to see the rebuild brother

Nice garage it’s so clean

I bet u didn’t do a cylinder 4 cooling mod when u got the car smh the only mod u need to do when u get a wrx

Just went through this same situation with my 40k mile engine. Im guessing ringland failure like my type ra. While you have it out and if the case is salvageable definitely put some forged pistons in because that is the weak link on these engines. I also suggest you get the torque solutions avcs cam gear bolt to get rid of those shitty hex head ones that strip out.

Making me want to go get an engine stand so I can go ahead and pull mines, pretty sure I spun a bearing the other day🥲

Not alone man. My 2020 sti had only 20k miles and had ringland failure. I was one of the unlucky ones lol. My cyl 4 was at 60psi as well when I checked compression. I now have a forged block with forged internals from outfront and a set of Iag heads and full bolt ons. These cars and prices are no joke 😂 but if anyone is looking for a set of IAG 550 Street heads, hit me up.

Its an ej 🤷‍♂️

It’s going to have broken ring lands on that cylinder

That top mount was not fun to get back in lol felt that

Sucks, but it looks like you're turning it out to be a positive. Good luck on the build. Subscribed!

😊 First pick a Horsepower goal. Then build accordingly. I'd say build it for 500whp. The bottom end with should hold with pistons. I would definitely put some cams in it Cam's really wake the motor up. I would focus on over building the fuel system. Buy once cry once on the fuel system. As far as turbos Gen 2. Ball bearing name brand. Don't spend retail on the Gen 1 stuff anymore. Either a Gen 2 Blouch dominator 2.5 or even a dominator 1.5. I would even stick with the top mount for now upgraded one used cheap definitely hard turbo inlet. Don't bother with the 3-in stuff Stick to the two and a half by the time you need to go to the three just go rotated.

Exactly why I’ll never own another Subaru All they do is give problems

Just found your channel today, love the videos man. I hope you’re able to continue to grow the channel and your brand, headed to pick up some of your merch to support and waiting to follow the progress on this STI. New STI owner myself so this is awesome.

IAG 550, or metro performance of SoCal based built engine

Well my 2015 STI block non RA lasted 35k with a 20g turbo. I ran it hard. Racing everyday with the heat lol.

bought a 2019 sti with only 20k miles didnt last me 1 month with whatever reason engine started making noise i knew about the subi engines going out everyone i knew told me not to get it sooner or later it was ganna happen or to finance my life lol because it was ganna be super expensive to get it fix long story short sold it as is lost quite a bit of money but lesson learn got my self a 23 Honda civic si no regrets