2013 silverado 5.3 engine knock

[Nnyhoser]

Just thought I would pass on this info. I bought a new 2013 silverado in June of this year and have a total of 3365 miles on it and it had a knock in motor which they(gm) not the dealer determined that it was the #6 wrist pin. There is also scoring on all bearings( main and crank) and on crankshaft. What they (gm) are going to do seeing they refuse to replace the motor is change number 6 piston, connecting rid, main and crank bearings and rings, but refuse to replace the scored crankshaft or polish it. My dealer told me yesterday they have also another truck that just was determined to have they exact same issue with the same cylinder. Just thought I would pass this on just in case there are more of these out there. I figure that within 6 months I will be back at dealer with issues with this motor again with the half assed gm decision on what and what not to replace.

[CKNSLS]

They manufacture hundreds of thousand of motors a year. The failure/error rate is very low. But every once in a while it happens. If they fix it correctly you shouldn't be back to the dealer based on the fact that there are probably a better part of 2 million of these motors on the road.

 

I know when it happens to you that anything anybody says really doesn't help. But I'm sorry for your troubles. Hope GM does the right thing! What was the explanation in not replacing the crankshaft?

[Badass69]

I would tell them to shove that Bs up their ass and get you a new engine. Take it to the territory manager and if that's a waste of time (likely) go higher. I swear gm cannot get any dumber these days. I would never, ever let a dealer meat monkey inside my engine. They are halfass mechanics that can do brakes and shocks.... not engine builders. Either that or get it towed elsewhere.

 

Like really... one piston and a crank with scored journals.... I hope these clowns go bankrupt again.

 

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[gnet158]

That really sucks... I agree with you about their mechanics. Keep your fingers crossed and get everything in writing. And then drive it to the ford/dodge/toyota dealer for a trade in.

[silveradoprime]

Well I am one of those "half assed mechanics" you are referring to. For your info for the dealer to warranty an engine we need to have it approved by GM, we need to show them what failed and why it failed, then call the tech line to get an authorization number. Then we can order an engine. If they tell us to do something else that is what we do. If it comes back and has failed again we then we do the whole process over again. Same goes with transmissions, transfer cases and axle assemblies.

 

So you know my customer satisfaction rate is at 100% and has been for over 2 years solid. I do electrical, drivability, and suspension work. Yes I have done engine repairs and have had success. So before you call someone half assed and putting me into a stereotypical view on the techs at your dealer, just remember not all dealers techs are idiots. And I have seen some "repairs" and hacks that have come from people out there, like pop cans as exhaust patches, no fuses on power wires, no relays on aftermarket lights, I could go on and on.

 

Do I agree with repairing your truck this way but if it is the GM has told me what to do, there is nothing more I can do at this point. And yes I would have polished the crank journal whether GM told me to or not, that way the new bearing would not fail as quickly again.

[Badass69]

Yes there is excellent techs out there.... but most of them that stick it out forever in a dealer aren't... Too much opportunity and improvement in the financial department elsewhere.

 

I know GMs process. Been through it more than once hence why I suggested the customer go above and beyond.

 

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[c0boy]

They manufacture hundreds of thousand of motors a year. The failure/error rate is very low. But every once in a while it happens. If they fix it correctly you shouldn't be back to the dealer based on the fact that there are probably a better part of 2 million of these motors on the road.

 

I know when it happens to you that anything anybody says really doesn't help. But I'm sorry for your troubles. Hope GM does the right thing! What was the explanation in not replacing the crankshaft?

 

It sucks but that is how they do it. My first GMT-900 went into the shop four times for an over oil pressure issue and they kept throwing parts at it. The fourth time they replaced the engine and I lemoned it.

[Cowpie]

And disable the AFM function as a measure to help prevent future problems.

[Badass69]

To heck with that, the engine is torn down so let's do this right. Remove all AFM parts and replace all lifters with non GM replacements like Brian Tooley or even Comp. Problem solved forever and you will have a good running engine. This is provided they rebuild it properly which this far they are not doing.

 

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[Black2011]

I have to agree with the OP, This is not a fair fix. You are paying to have a brand new fully functioning truck. Now this truck is repaired poorly. It may even get out of the warrantee period. But while others 5.3l trucks are going 300k miles, yours is spinning bearings at 160k. Im just sayin you need to put more pressure on GM to remove that lemon and drop another 5.3 in its place. GM can afford the 6k bill for replacing the engine, thy will make that back when they sell a truck at my dealer today.

 

Ensure GM that if they want to retain you as a customer, they need to fix this correctly.