Engine Seized

[Green38]

I just replaced my 3800 v6 the other day i started it up and it ran almost perfect; just a little tapping from the rockers, but as oil got to the it went away. it ran perfect for 3 days. The next day the tap came back but was worse, figured the oil level went down so i put more in but it didnt go away. As i was pulling out of a parking lot the tap turned into probably the worst knock ive ever heard. the knock got louder as the rpms went up. figured it was a vacume or exhaust leak i checked for them and nothing was wrong. the i took the valve cover off figuring it was a loose rocker not that either. so i started the car and tried to drive it around the block. after a mile or so the engine seized. Tried to restart the car, nothing. Popped the hood and tried to start it again i heard the starter trying to turn the flex plate still nothing. what could it be? i figured either a rod broke loose or my flex plate broke loose from the trans.

[wulfpack06]

spun bearing?

[Bio248]

its rare to completely seize up these motors. what the crap did you do?

[PonchoGP]

It's not the flexplate. Where did the engine come from and how many miles did you put on it before it siezed? Was it a yard motor or a reman?

[Bio248]

was there a warranty on it? usually a yard will give you 90 days or so.

[chrisb]

sounds like a spun bearing, when mine seized up, one bearing went under the other one and it stopped real quick.

[Green38]

I got it from a yard and it has a 60 day warrenty. I rebuilt the top end but never checked the block. If it's a spun bearing Im going to end up just rebuilding the original block and put on the rebuilt top end and returning the yard one thanks for the help now I know about where to start