- Jan 25, 2013
- 62
got a question. is there anyway to make a 2008 4.2 inline 6 work with a 2006 trailblazer? I bought a 2006 super clean white trailblazer EXT with sunroof, cloth interior, tow package, 4wd with 162,000 for $1,000.00. it had what i thought was loose timing chain, ended up being spun rod bearing. pulled engine and replaced crank, and rod bearings, and crank bearings. reinstalled engine, fired right up, but had a lifter tap. discovered one of the roller rockers was loose. I had heard a bunch of whore stories snapping off head bolts to get head off, so i purchased a 2008 4.2l complete engine for 500.00 bucks that had only 100K miles on it. got it installed, won't start. i discovered that the crank sensors are different from 2006 to 2008. is there anyway of making this engine work or am I SOL and have to remove engine and just rebuild top end of the original engine?