22RE

I need a motor whisperer. Second time I had to rebuild this motor in three months. Had a main bearing failure. Anybody familiar with these?

you're doing something wrong.

are you getting it tanked to clear out all the oil passages? are you checking the oil pump clearances? crank thrust in spec?

even el cheapo enginetech rebuild kits will last 50k+

either it's starved for oil or something is out of spec.

Why the hell are you rebuilding it? Just get a reman.

>get a reman.
junkyard $400

like he said OP something must be out of spec
did you even measure when before you started re-assembling? i used to rebuild diesel engines and you do just as much measuring as wrenching
you cant just throw everything together and expect it to work

Bought brand new crank, rebuild kit, new oil pump.
Torqued everything to spec mug ran fine for about 300 miles then developed a tap in the bottom end.

either a bearing is starved from a blockage or something is out of spec that's all it could be.

you checked the bearing clearances and shit right? lint free rags / coffee filters / assembly lube / etc etc?

Yea, what kind of lube? Moly?

Reman 1,500

No it doesn't make me an expert mechanic but i do own one of these and have worked on it quite a bit. Like the other anons said, if you're rebuilding it measure fucking EVERYTHING before you reassemble. Of it isn't wigging spec don't put it back together. Also not a bad idea to have the block tanked and cleaned out. People tend to abuse these engines because they will take it and keep running. If a main bearing failed shortly after a rebuild it seems like it would be one of three things.
>something was out of spec on the block or crank when you reassembled it and a race could spin
>the assembly lube didnt hold up when you started it back up (improper amount or type)
>or you didn't prime the oil pump gears and it ran for however long without proper lubrcation.
Props for picking one of these though OP. They are fun to wrench on.