What do you think of the iron block? I think I'm just assuming all will be well since these sellers have 99% positive feedback over thousands of sales.

 

I'm certain there is a more detailed warranty document that comes with the motor, I just don't have it.

Having had a previous career at a shop that built engines (amongst other things) I have a little more empathy for GM's warranty dept. Frankly the average consumer can be pretty dishonest and does amazingly stupid things mechanically. If someone makes a mistake that frags a $10K motor, they are looking for someone to blame/foot the bill. Most don't really care who they have to lie to for that to happen.
We got to the point that with some builds were were using UV activated ink to draw over bolts so we'd know if someone opened up a project and messed with it. There were some interesting conversations with broken cars where we could see someone had gone into something a messed with it.
I remember one guy who accidentally pushed a car into 1st gear instead of 3rd at WOT on the straight at Laguna Seca. The mechanical overrev was so violent it shoved a pushrod 3" through a SS shaft rocker arm. Guess who was at the shop demanding an engine warranty the next day... God himself couldn't build an engine that would have survived such a mistake.

 

Lowend - I asked GM for the warranty document and they sent me the same one you copied. I was expecting to see arbitration provisions and other roadblocks and I was a little surprised by how short it was but I think maybe that's intentional so they can provide their own interpretation whenever someone files a claim that they deny it and fill in the blanks the way they see it.

 

You might want to read up
https://www.ftc.gov/legal-library/br...provements-act

Basically says that a company cannot blanket void a warranty on services unrelated systems. IE if you change headlights and the transmission blows out, GM has to honor your transmission warranty.
If you truly just changed valve springs, and a ring land cracked or similar, you have legal recourse

 

Lowend, - Thanks, I'll read that. Yes, I'm filing suit in Magistrate court. Fortunately they have a registered agent near me so I can file in that jurisdiction. There is also another avenue, the Magnuson-Moss Warranty Act. Chat GPT is really good for some things. This is probably more info than you want but this will be the basis for my suit agains GM.

1. Burden of Proof – Aftermarket Parts

• Citation: 15 U.S.C. § 2302(c) (“No warrantor of a consumer product may condition his written or implied warranty... on the consumer’s using, in connection with such product, any article or service (other than an article or service provided without charge under the terms of the warranty) which is identified by brand, trade, or corporate name.”)
  
• Meaning: GM can’t deny coverage simply because you used aftermarket valve springs. They must prove the part actually caused the damage before they can deny coverage.
  

2. Prohibition on Tie-In Sales

• Citation: 15 U.S.C. § 2302(c) (same as above).
  
• Meaning: GM can’t require that you use only GM parts or GM service centers to keep your warranty valid, unless those parts/services are provided free. This is the “anti–tie-in sales” provision.
  

3. Good Faith / Clear Disclosure Requirements

• Citation:
  
  • 15 U.S.C. § 2302(a): Requires warranties to be written in “simple and readily understood language.”
    
  • 15 U.S.C. § 2304(a): For “full” warranties, the warrantor must remedy defects within a reasonable time and without charge.
    
• Meaning: Denying coverage after forcing you into unnecessary diagnostics, if unrelated to the failure, may violate these requirements because the warranty must be honored fairly and transparently.
  

4. Remedies Available

• Small Claims Court
  
  • Citation: 15 U.S.C. § 2310(d)(1)(A): “A consumer who is damaged by the failure of a supplier, warrantor, or service contractor to comply… may bring suit for damages and other legal and equitable relief.”
    
  • Citation: 15 U.S.C. § 2310(d)(1)(A)–(D) clarifies that suit may be brought in “any court of competent jurisdiction in any State,” which includes Magistrate (small claims) courts.
    
• Attorney’s Fees
  
  • Citation: 15 U.S.C. § 2310(d)(2): “If a consumer finally prevails… he may be allowed by the court to recover as part of the judgment a sum equal to the aggregate amount of cost and expenses (including attorneys’ fees…).”
    
• State Law Overlay
  
  • Citation: 15 U.S.C. § 2311(b)(1): The Act does not “invalidate or restrict any right or remedy of any consumer under State law or any other Federal law.”
    
  • Meaning: You can pursue Georgia warranty/consumer law claims alongside Magnuson-Moss.
    

5. Your Leverage

• Burden of proof: GM cannot just point to the aftermarket springs — they must prove causation under § 2302(c).
  
• Escalation options: You can invoke § 2310(d)(1) for a private right of action, and § 2310(d)(2) for attorneys’ fees (if outside small claims).
  
• Combined strategy: Federal law + Georgia state law gives you multiple legal hooks.
  

✅ Bottom line: The key provision for your springs issue is § 2302(c). The key remedy provisions are § 2310(d)(1)–(2). And the fairness/clarity obligations come from §§ 2302(a) and 2304(a).

 

The base error was thinking any GM warranty held value. I learned how the company deals with lemons in 2000. I also learned how dealers lie to avoid responsibility. I was young and angry then. Now, I would just go into any purchase knowing and fully expecting to be on my own. That's why I support secondary sales of these old cars and spend my money elsewhere on the new side. GM lost out on a sole lifetime brand loyalist. But that has no effect on the machine that it is. I just vote with my funds elsewhere quietly.

 

I feel this quote!!

 

Tusc - I agree completely and that is why I published my issues with GM warranty on crate motors to let others know about GM's business practices. If you decide to buy a new crate motor, just understand their warranty is not worth much. After months of didling around with GM I bought a refurbished engine rather than a new GM since it was cheaper and the GM warranty for me has proven to be worthless.

 

Oil pan question.

Shop wants to put existing LS1 oil pan on the crate LS3.
Is there any reason to do that?
With internal engine damage on the LS1, it's possible that the oil pan is damaged and the shop says they will source an aftermarket pan in that case. What is different between LS1 Corvette pan and an LS3 crate pan?

 

Depends on the LS3 pan, if it is a wet sump C6 pan, it will fit in a C5 and work just fine in a street car. Camaro, G8, SS, and truck pans will not work in a C5.

2 piece C5 pans are fetching decent money. So, if they swap the pan be sure to get it.