Tearing down a worn LS7 track engine in preparation for a rebuild After many seasons of hard racing an LS7 is tired and ready for rebuild. Here's what we found on the initial tear down.

Richard Holdener Holdener took a stock, flat-top 5.3-liter LS and put it on an engine dyno to find a baseline power rating. The results were as predicted: 342 peak horsepower and 379 lb-ft of torque.

While both terms, overhaul and rebuild can indicate the complete disassembly ... However, unless you're performing some sort of strange LS engine swap, a simple replacement of your car's engine ...