Uh oh, motor help needed

[SCIV]

Yesterday could turn out to have been a very bad day...



I need ideas where to start. First a little background. I was out doing some WOT runs, 3rd gear 120 mph+, and it shut down. I mean shut down dead. Reduced Engine Power displayed, I coasted to the shoulder and tried to restart, but nothing. All electrical systems appear to operate fine. Starter "clicked" when I tried to fire, so I thought it was the battery. Got a jump, nothing. New battery, nothing. When I crank it, it responds with a "thud". Got one code, P1516, but I think that was from draining the battery & trying to restart.

No smoke, no parts blown through the side of the block. The only sound it made was a screeching sound before stopping.

I tried to turn the engine over via the crank bolt, but it won't budge. Seems locked up or something. Where should I start?

I think I feel like
S.C.

[wondertruck]

start looking for a new short block...

[RedHeartbeat]

Yep, sounds like you trashed the crank.

[SCIV]

<div class='quotetop'>QUOTE(RedHeartbeat &#064; Jul 15 2007, 02&#58;44 PM) [snapback]99511[/snapback]</div>

Yep, sounds like you trashed the crank.
[/b]

How do I easily confirm the problem?

[RedHeartbeat]

Look for yourself a forged shortblock with 8.5-9.0:1 compression so you can turn up the boost. Sorry to hear about the bad luck but when one door closes another one opens for a new opportunity. It&#39;s still a beautiful truck so don&#39;t get depressed, just think of it as an opportunity to make it better.

[GMCwantsLS1]

L92? Talk to Allen before you make any decisions.

[RedHeartbeat]

She looks like she&#39;s got the hang-dog look going on. She probably knows it&#39;s getting ready to become dangerously fast.

[RedHeartbeat]

I&#39;d say there isn&#39;t an easy way. It&#39;s all going to hurt&#33;

Get you a socket and cheater bar on the crank pulley and tighten the hell out of it. If it won&#39;t move try loosening. If it won&#39;t move at all you either broke a rod and embedded it in the crank or you spun the mains and locked it up tight. Since it&#39;s locked up you&#39;ll have to pull the convertor out with the engine, you won&#39;t be able to get to the bolts to remove it. Remove the engine and transmission as an entire assembly. That is going to be your only option and believe me, it&#39;s easier than trying to seperate the two while they&#39;re in the truck.

[2boosted]

been there, belive me is a crank, rod piston problem, no more to say, no where to run, still crying for mine. Not specting that right now, head up full ( so does credit card) for a FM turbo system for the LT1

[02CHEV]

Dude sorry to here about your baby . I feel for ya