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BR3W CITY · 06-30-2014, 05:26 PM

The ls motors are 300k motors, usually not more. I'd say the average life of a decently taken care of 5.3 is 175-250k, with many going more. Its rare to find completely melted-down ls motors unless it had aftermarket stuff on it.

That being said, I wouldn't put a 150k motor into my swap. I'd consider it a great complete core, and do a selective rebuild. You may NOT need piston rings or a valve job at that point...but its sure easier to do them to start with. LS motors take "refreshing" very well.

06-30-2014, 05:26 PM	#3
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: how many miles is too much? The ls motors are 300k motors, usually not more. I'd say the average life of a decently taken care of 5.3 is 175-250k, with many going more. Its rare to find completely melted-down ls motors unless it had aftermarket stuff on it. That being said, I wouldn't put a 150k motor into my swap. I'd consider it a great complete core, and do a selective rebuild. You may NOT need piston rings or a valve job at that point...but its sure easier to do them to start with. LS motors take "refreshing" very well. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD