200,000 Miles Maintenance

There is maintenance (egr, plugs, fluid changes) that will help a healthy engine stay that way and there are repairs that solve serious issues.

It is unlikely you have blown the head gasket yet or else you would be complaining about a SEVERE startup rattle that sounds like metal to metal rod knock.

Severe metal knocking that goes away in less than a minute and may be gone the rest of the day, with or without obvious coolant loss, is 99% head gasket and is when a borescope inspection of the pistons is suggested. I doubt you are there yet.

Your sudden onset of excessive oil burning is a big concern. It will carbon up everything including the egr, valves, pistons, intake and catalytic converters. A head gasket fail, an expensive clogged cat or a complete engine fail with holes in the block is very possible down the road with excessive oil burning. Assuming the engine does not seize first by running out of oil.

There are solutions but if you want another 100k miles and value reliability highly, start saving now or consider trading while the car still has value.

 

IMHO; if your looking into a short block or JDM used engine; I'd also look at a fully rebuilt engine too - since your pulling the engine anyways. It all depends on the shape and condition of your car and how much longer your planning on keeping her. While JDM engines are an option, the fact is that your "rolling-the-dice" on another gen3 engine - with the same design problems. Short blocks and rebuilds are suppose to have the updates in them to mitigate the original issues.

Just food for thought.......

 

Specifically: revised pistons/rings. Toyota, likely in effort to eke out a few extra tenths of mpg in brownie points, spec'd low-friction piston rings, till partway through model year 2014. They've proven to relaibly to oil burning issues, around 150k~200k miles.