overheated 370/no oil part 2

Jordo!

The knocking you are describing is probably rod knock -- meaning that due to improper oiling, the bearings were toasted, and bam -- dead motor.

This leads me to believe either:

(1) Faulty motor -- possible, but the lack of oil begs the question of where it went...

(2) oil pump or oil pickup failed -- again, possible, but then we'd see evidence of a destroyed oil pump gear or something major blocking the pick up in the pan -- again where is the oil?

(3) Seriously fvcked engine from improper ring sealing due to incorrect break in/poor build -- possible, but it's hard to imagine all the oil went into blowby and you would have been way down on compression and therefore power

(4) Oil leak or oil was never put back in -- the pistons and rods are coated with a dry lubricant film (I believe), so yes, it is actually possible that you had hardly any oil in there and it held together for a while before breaking -- highly unlikely, but not impossible.

(5) A combination -- not enough oil was put in, you were burning what little there was from improper ring sealing, etc. finally insufficient lubrication led to toasted bearings.

Get a lawyer.

And a leakdown test/teardown.

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Enjoy it. Destroy it.

WarmAndSCSI

Engine output actually may not be affected by poor ring sealing which is causing oil consumption. Depends which rings are at fault. Failure or poor sealing of the oil control ring and/or the 2nd compression ring can cause oil consumption, but not necessarily a large loss of power since most of the cylinder sealing is accomplished by the top/1st compression ring. Power WILL be lost by inadequate oiling of the wrist pin, piston skirt, etc. in those cases, however. But that power loss would be negligible until you had a wrist pin seize on you.

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Jordo!

Thanks for the clarification -- expertise is always relative, so it's good to talk to someone I can learn a thing or two (or three) from

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Enjoy it. Destroy it.

Zaggeron

That's my current theory. When he got his oil changed they didn't put in enough and that caused the rest to slowly burn off.

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2010 Platinum Graphite 370z Roadster:Touring/Sport
2013 Subaru BRZ Limited