Destroyed Subaru FB Engine Teardown. Cylinder 1 rod bearing is MIA. This is why oil is so important.
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Subaru has used the EJ series of engine for a very long time. Over 10 years ago, they switched to a new direct injected, timing chain driven engine. The FB and FA engine platform was started. The FB engines you'll find in most U.S. naturally aspirated line of Subaru. Impreza, Crosstrek, Outback, Forester and Legacy lines all contain the FB. The FA engine is turbocharged or has higher compression for performance. The FA turbo's are found in the new WRX's, XT's and Ascents. The N/A high compression version are found in the BRZ's. They has a few issues but overall, their all good engines when properly maintained. This engine in the video, was not properly maintained and suffered a major failure. This is why oil is so important and proper maintenance is also important.
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I have a 2015 Outback with the FB25 engine. At almost 394,000 miles I have a combustion leak into coolant. My question for you is, someone told me it's a cracked head and not head gasket because the coolant does not run through the head gasket. Do you agree with this? If you check my channel I have a couple recent videos showing how the coolant is behaving. Pretty much after short 10 min ride, my reservoir pretty much fills with coolant and if you pop reservoir cap, you can see it bubbling. I did a vacuum test on coolant system and after 2 hours, psi remained at 25. I was expecting to see this drop. Compressions tests from each cylinder were 150,140,140,130. I tried that test kit with blue fluid that sits over radiator and sucks in air, it turned green which confirms presence of exhaust gases in coolant.