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Message: <blockquote data-quote="corvairbob" data-source="post: 17072" data-attributes="member: 5236">outside of injection issues but i think all the engines had direct injection. but for some reason gm put a different head on some models. maybe it was a California or canada thing. it may be a bit different in the pollutants the engine produces. but the timing setup is the same but for the intake cam on the 2013 head. and it might be the same for the 2017 head. i put the le5 timing set on my lea or 8 engine and it actually fit and when i tried to turn the engine over i got maybe 5 degrees and a piston hit a valve. i then found out i had the lea or 8 engine and had to get a different set of vvt sprockets. but i also had to get the chain set as it was a kit so i sent the kit back and got a new kit for the correct engine. outside of that i'm sure they are the same head. i did see a Yt that someone change the lea cam for the le5 cam but i didn't save it as i did not have the le5 cam. good luck  id id a rebuild on my engine and used the stock pistons as they were actually still  in speck and i had maybe .005 taper in the cylinders. but i also did a mod to the pistons that the hot rodders doe to make the oil drian out the oil rings faster by drilling them. but don't do that unless your good at mods and know how and where to drill. a hole in the wrong spot might give you headaches. i also did the old school pvc mod as well. htey have that on YT and my oil use has went to almost nothing now. i just doe a cloyes timing chain lookup and for the 2013 and the 2017 they part numbers are the same take a look for your own research. plus they have good q/a and a video that shows how to do this.   [URL unfurl="true"]https://www.cloyes.com/[/URL]good luck</blockquote>

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