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As you know, we went through more than a few engines during HiLow. Our Subaru engines failed more numerous reasons, but engine number 3 failed for a very different reason than the others. Let’s figure out what happened.

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39 thoughts on “Subaru Engine #3 Teardown

  1. 8:24 Since the vlaves were still fine and sealing but no cams rotating, maybe its to do with extra vacuum and compression on the intake and exhaust stokes? Or the cam has a valve open a tiny bit so its the sound of air rushing through it? Hard to tell from my phone speaker though. (edit: hadn't watched farther, might just be light valve contact too lol)

  2. This is a pretty great business model. Do everything you’d do with a project car from buying, modding, driving, breaking and fixing it and make a video about each and get over 1 million views each. Well done Donut

  3. Wouldn't you get bubbles either way on the intake side? I mean the valve seats are actually designed to seal the combustion chamber but idk that they would expect someone to 'blow compressed air in from the back, just the shape of the valve in the seat looks like it would allow SOME air in from the back of the valve… Although I suppose it may be different on engines designed with forced induction in mind, idk… Just posing a theory…

  4. These guys read my mind as I was watching the video… I kept thinking "Well what if" or "How do we check?" and then they instantly answered my question. They went over everything.

  5. What went wrong? Y’all picked the WRX with the 2.0 that’s already maxed out without significant internal upgrades. You should have went with the STi and the 2.5, you wouldn’t have had these issues

  6. awd is the best if you know how to drive it. but if you don’t know what you’re doing it can give you dangerous confidence, and you will oversteer try to correct it correct it too much and end up in the ditch.

  7. I mean I can basically relate to this (without the crash part, sorry james), I was driving on the highway on my way home from a night of very legal activities in Mexico Canada lol, I was driving at about 110km/h or roughly 70 mph when suddenly this heartwrenching noise appears of something smacking something, I hit the clutch and the car shuts off. I try and coast as close to the city as I can in neutral, I pull over and check the engine bay, everything looks ok. I get my dad to come with some ratchet straps in his truck (im in a fully built acura integra with a full jdm itr swap) tows me back home to my garage, then I start to try to figure out what went wrong, and instantly tears start pouring from my eyes, I was 17 years old and I started my project car before I was even old enough to get my drivers license, 15 years old. My dream car was perfect. And I saw the timing belt missing ( I had an exposed camshaft due to stage 2 Cams). I didn't even bother ripping it apart, I knew the motor was full contact, my pistons and valves, R.I.P Edit: Oh and the car had super short gears, so cruising at 68 mph was at 3.8k rpm

  8. You should always relive your mistakes, it prevents you from repeating them. Why do you think world history seems to be circular in nature… enough generations go by that those in power haven't lived through the mistakes of the previous generation and start making the same mistakes because they never lived through them. Own your mistakes and learn. Help others not make the mistakes you made.

  9. I'm really glad this happened because I learned so much from this. It may be expensive but you got to teach about it AND make money off of some of the content so it's not like its not a win win.

  10. If you take the valve covers off there's a place to put a wrench on the cams…Just forget Subaru's exist, you've done more than enough damage. Turn the bolt not the cam you cavemen.

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