Which is why I still say trash it all! Junk yard engine is a gamble, but it's also cheap and hopefully not all scratched to hell inside.

 

So throw away a fully built motor?

I think you guys are paranoid. Even if the entire motor was "compromised" why not slap it back I and crank the boost until it dies?

The head I don't care about because I have a spare built 99 head i've been waiting to put on.

Why not just tear it down, hot tank everything and get new bearings and an oil pump (got a spare one anyway aswell).

 

If you didn't overspin it and you are comfortable with the fact that it could blow, just run the ******.

 

Pics of said bearings?

Bearings are designed to wear when faced with **** like this in order to protect the crank right. So say the oil pump is fucked, replace it, cam journals are fucked, replace the head, essentially do a full rebuild, it's not like I'd be the first person to have metal eat some bearings.

 

That's a rod bearing though right. My old rod bearings looked like that but the mains were alot different, they look like the mains of my current engine, less shiny mostly but still have longitudal lines in them (one has a big cut down the center of it too)

 

As long as all your clearances spec out I say new gaskets/bearings/rings and reassemble...but with '99 head.

 

n/m, I wasn't aware it was built. Since it wasn't an over rev, just a full rebuild would suffice for my nerves. Check cam journals well and go for it.

 

Crank bearings were actually in slightly better shape than the rods.

 

Ok Heres a BIG surprise:

My Rod bearings are FUCKED! Haha

3/4 rods spun and they are fucked up for sure.

Metal shavings plugged oil gallery, carnage insues, crank is garbage probably lol.

I'll take the rods in and see what they say about them, probably reuseable but definately need bearings. Crank can probably be turned and ground down, or I can use my spare crank, I'll get both looked at and choose the better.

Only rod that didn't spin the bearing was cylinder 4. The rest are just, well I'll post some pics lol

 

All of them were squashed and scarred and gougded and just fucked.

And you guys thought my mains were all fucked up lol

 

Fubar! Nice pics.

 

Look at those scars!

 

Could this all be caused by your damper coming off? I could definitely see it...

 

Doubt it, the crank oil galleries are completely filled with metal, that's the cause of the bearings but what caused all the metal in the first place? Could be the oil pan metal, maybe it wasn't cleaned well after I ground it down and installed it. Or maybe it was something else...

 

I think I just decided I will never buy a built motor.

 

How does the oil pump look inside?

 

does the 15k RPM number have something to do with the miata using a wasted spark system?

His rev limiter was 7800...2x7800 = 15,600

 

FWIW I don't recommend buying someone else's built motor either. That mistake cost me about half a year and almost lots of $.

I'm very interested in the real cause of failure- if it was the dampener or if the motor was running "without any problems" and the dampener failure made you peek inside.

How does your crank look?

Also, FWIW I hit 10.5K RPM on my stock motor when I went from 3rd to 2nd @ 80mph. My tires locked up and it sucked. It was only for about half a second. Stock motor "survived" but I don't know what the interior crocodile alligator argh I mean what the engine internals look like yet.

 

+1, I would love to inspect this block. Keep us updated.

 

No, that doesn't matter.