Originally Posted By: WayneandAnna
supton, do you think Toyota will fix the problem or just replace the engine?
Most likely, they will either replace the engine (Which is what you should hope for, and request) or install a new "Short block" using your existing cylinder head.
Trying to disassemble and diagnose a problem of this sort is best not left to a dealership tech......The engine should be returned to Toyota central intact, so that they can systematically assess the issue, and determine if it was a one off, or something they should worry about showing up elsewhere.
My guess is a piston (#4) somehow slipped through without a machining operation, leaving oil return holes unfinished. Or.....Oil control rings installed incorrectly.
Though it is possible (But less likely) that it could actually be a problem in the valve train.......Another reason to insist on a complete engine.
supton, do you think Toyota will fix the problem or just replace the engine?
Most likely, they will either replace the engine (Which is what you should hope for, and request) or install a new "Short block" using your existing cylinder head.
Trying to disassemble and diagnose a problem of this sort is best not left to a dealership tech......The engine should be returned to Toyota central intact, so that they can systematically assess the issue, and determine if it was a one off, or something they should worry about showing up elsewhere.
My guess is a piston (#4) somehow slipped through without a machining operation, leaving oil return holes unfinished. Or.....Oil control rings installed incorrectly.
Though it is possible (But less likely) that it could actually be a problem in the valve train.......Another reason to insist on a complete engine.