I picked up an ls2 out of a trailblazer ss. I'm wanting to put pmd rings from an ls2 vette. Are the pistons the same between these 2 6.0's? Also any help with direction on where to get the right rings is appreciated. Thanks

 

They may not be. I think there were different rings sets for different years/models. Some had a 1.5/1.5/3.0mm package, some had thinner. I think Hastings has a catalog that could help you out, or you could use a dial caliper and measure the ring thickness to verify.

 

Thanks for the reply

 

Have you done a cranking compression test or leak down test. Unless the motor has poor ring seal then you might do more harm than good tearing the motor down and doing a at home rebuild. Also it's not exactly cheap to rebuild a LS motor, gaskets, seals, and replacing all of the TTY bolts, even a "cheap" rebuild starts to get expensive.

 

It spun a bearing so that's the reason. While it's apart I want it done

 

I'd say that's a pretty good reason. It seems like from time to time someone joins and wants to rebuild their motor just because it seems like a good idea. Good luck with your rebuild.

 

The Trailblazer SS is an LS2 and uses the thinner ring package.

 

Will the thinner rings still seal ok if I'm going for a 500rw NA build? I might spray a little nos in the future. Thoughts?

 

The stock LS2 rings are actually a very good ring for a factory application. For most people I recommend Mahle's Original replacement series which usually have a moly coated steel top ring instead on an iron ring, napier second, and they're pretty affordable. If you make more than 600 then step up to Total Seal AP with a nitrided steel top.

 

Thinner rings are good for sealing the combustion chamber. They conform to the bore better and reduce friction at the same time.

 

Thanks for the replys. I think I'm going to just go with some gm replacements

 

The GM replacements are good rings but expensive. I think that Mahle makes them for GM. The GM rings are a steel top ring with a napier second but I think they're around $250 for the set.

 

Just got some gm's for $200. Thanks guys