[XJman]

9/10 times spun bearings are lack of maintenance and abuse. I can't speak to the turbo, but it wouldn't be out of the realm of imagination to say the same oil failure that killed the bearings killed the turbo.

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[XJman]

The turbo has a bearing in it that if dry will make shavings. What happens elsewhere is beside the fact.

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[XJman]

It is completely beside the point. Your filter should catch everything unless it clogs then the bypass spring opens and allows all kinds of stuff through. The mesh won't catch the small sand like particles common with failing bearings or metal wear. Those particles can get past the filter and to the turbo causing failure of its bearing and metal shavings there.

Yes it's possible your turbo could have died from spun bearings, it's more likely your turbo died from the same thing that caused the bearings to fail. If you don't trust the shops answer tow it to a different shop.

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[XJman]

Hundreds of miles with fried bearings? Man, yeah it's completely possible in that length of time the particulate are up the turbo.

Usually with a dead bearing they last hundreds of seconds.

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[XJman]

Find a new mechanic. If this is the same guy working on the car now find a performance shop with a good reputation with Subaru and pay to have the car towed there. Don't ever drive a car with rod knock. What may be just a short block may wind up an entire long block plus.

Sadly at this point I would begin to start saving because there is a likely hood you may have damaged a head.

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[XJman]

Updated the last post, my phone went haywire.

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[XJman]

Contaminated oil can damage a head. Especially if the bearings were shot for that long and you have that much crap lubricating everything.

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[XJman]

I'll bite. What can be damaged and how? A head is a casting with a bunch of added holes drilled in it. Not much to damage except by badly overheating it a la head gasket failure or by overenthusiastic porting.

Everything that needs to be moving in the head. Bearing surfaces, cams, everything. The head is more than just a casting. This isn't a flat head Ford.

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[XJman]

So you don't actually know. Got it. Wave your arms all you like; I'll not respond again.

You have 2 cams, 8 valves, all in the head. All moving, all using oil delivered to lubricate. You obviously have never taken down an engine with oil issues.

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[XJman]

I've gone through this exact issue with my old ladies stratus. Bearing goes, doesn't tell me the car is banging like crazy drives untold amount of miles. Any postulation on Earth can be proposed but the facts are the material can get to the heads, destroy the springs, cams, bearings as well as the valves in some applications.

As that material is getting eroded by the material from the failed bearing it creates more and the issue compounds.

The ops problem is not of the turbo is dead. Or can a spun bearing destroy the turbo. At this point it is what is causing his lubrication failure.

If you are so sure of yourself, pour some sand in your heads and let me know how it turns out for you.

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