Despite it's "Vortec" name, the Vortec 4200 is actually part of the Atlas engine family, rather than the LS-based small block family. The Atlas engine family is a group of inline 4, 5, and 6 cylinder engines produced from 2002 until 2012. The 4.2L engine was produced under the engine code LL8. The 4.2 Vortec is an inline, or straight, 6-cylinder engine produced from 2002 … [Read more...] about The 5 Most Common Chevy 4.2 Vortec Engine Problems