Im pretty sure I could get it taken car of between me and CRAZYCUTER4.8 and his resources. Im gonna let the guys find the problem and figure it out from there. Depending on the probelm and the fix I might do it myself. The **** part is its my only ride and it wouldnt really matter if I hadnt of tapped out of $ last week! Keep your finges crossed for me. I just find it hard to believe that it is a roc. The chances of that happening with such low miles and 4 days after the install is wild. Hell I wish I had sprayed the damn thing to at least have a reason. If it is a rod what in the hell causes this just a weak part?

 

nothing is wrong with the rod. the rod bearing between the rod and the journal of the crank has spun. It usually is caused by either poor oiling or bad machining. I am sure other things can cause it but those are the primary 2. It is not a bad thing unless it scarred the crank. then it is time to yank it machine the crank and re-install. no matter what if it is a rod bearing......replace ALL the rod bearings and main bearings and install a new oil pump. I am not sure if these new trucks can pull the pan without yanking the engine. If you can you can swap out bearings with the engine still in the truck. you could get out of this for around $200 if you are lucky, which you seem not to be. no offense. whatever you do don't drive it and don't start it. the more it runs the more likely it is that the rod will tear up the crank.

 

Ok I hope your right man! The LS1 was never machined it came striaght out the Firehawk and into my truck. When you say poor oiling that I will have to research. The guy that had the motor before me is a LS1 enthusiast and it was said he took good care of his motors(Ive seena few of his vettes) So you think that my oil pump failed or it isnt up to the task for the LS1?

 

Is this the same nelson tune that crazycutter48 tested out last week?
Same one that showed .650mv O2 readings at WOT? If so...

 

.650mv?


I feel for you TigerFan -- I've been without my truck since Nov. It sucks.

 

no its not the same tune.....

 

I don't think this is a wise idea. If you spun a rod bearing, most likely, 9 times out of 10 your going to need the journal polished out. I think if you were able to do it, you would just spin another bearing. If you do rebuild it go with some high quality bearings, don't skimp on them. I always go with Clevite Tri Metal (H if the crank has a large radi's) and have never had one spin. If you spun a main which I don't think you did, it would be smart to have it align bored while it's in the shop.

I've been in a similar boat and I know it sucks so I feel for you.

I do agree with Sierra on this point, don't even turn the engine over, every time that crank turns, you'll do more damage.

 

The tune I was talking about when I F'd my piston up was the same tune my buddy CRAZYCUTER4.8 dynoed with except he made it a little richer for obvious reasons. That isnt the tune Im using for the LS1 though. I had that one tune in for a total of 20 miles but it had nothing to do with this LS1 probelm. If you dont think it s a spun bearing what is your guess? This whole situation sucks my left *** cheek and my right nut at the same time. By the time this is over with I will probably been able to do a 408. OUCH! Im praying I dont have any cylinder wall damage and at the worse it is a spun bearing. I like the LS1( for the 4 days it was ruinning right) and regardless of what the verdict is one good thing is to come out of this it will no doubt be a stronger motor! Thanks for all the help and Ill keep you guys updated. My guy didnt get a chance to check it outToday so I will know 1st thing Tomorrow. The sad thing is he was working on some asshoels PT crusier and on top of that it was one of those woody ones and on top of that it had those gay *** magnetic flames on it.
That almost hurts as much as the motor being sick!

 

It really sounds like a spun bearing. You most likely would have experianced a little power loss and it would have sounded so bad that you would have shut down and called a tow truck if it was a broken rod. I would bet money it's not a rod with that kind of mileage on it. The LS1 rods are pretty damn strong too, not as strong as forged but they will take some decent hp before you have to go forged. I think you are better off with a spun bearing than a broken rod too. A broken rod can cost you a ton of cash. Either way you'll have to pull it because there it is a whole lot easier than trying to do it with it still installed in the truck. Maybe you can buy a beater for the winter while you're rebuilding. Good luck.

 

Damn man that sucks, hope you get it figured out soon.

I know what you are feeling though my 03 Silverado SS now has 32,000 miles on it and I am already on my 2nd motor.