Let's play a game of "What Happened to Kill my Car First?"
A couple of days ago I ended up on the side of the road with my car making a lot of really bad noises and refusing to run. I realized pretty quickly that something was not happy in the bottom end and had it towed home. Here are some video clips of the sounds it was making.
Knowing I'd need to get into the oil pan, I broke out the hoist and pulled the motor. This is what I found once I got inside.
A chewed up thrust bearing.
A whole bunch of paper thin chunks of metal and a thorough coat of metal shavings along the bottom of the oil pan. Also 1 broken off oil squirter nozzle.
One of these things is not like the others.
Then we have this gem.
And that, boys and girls, is what it looks like when a rod bearing disintegrates...
So! Now for some information.
This motor was completely rebuilt last spring and has roughly 1k miles on it with new forged rods, pistons, rod bearings, main bearings etc.
Here is the build thread for full details. http://www.miataturbo.net/build-threads-57/k-bai-tale-one-mans-struggle-do-right-86250/
Everything else in the motor seems to be in really good shape. From the looks of things it's just cylinder 2 that had any issues.
So what the hell happened? I've seen other threads that talk about Wiseco pistons snapping oil squirters. Oddly enough that cylinder looks like the only one that touched and was broken. But it doesn't look like it got caught and screwed anything up.
The thrust bearing definitely got mangled by the crank but I'm fairly sure I installed it correctly, I rember reading up about it.
Or did that Rod bearing just seize first and start to screw things up? I can't think of any reason it wouldn't have gotten proper lubrication. I've got one noticeable oil leak but i changed the oil 3 times over the 1k miles it's been running....
So what gives? Let's hear your theories.