vht

I have a 2015 chevy truck, doing a favor for someone, and it came in with PO300 code, cat codes also. It was missing on #6 and 8 cylinders. #6 injector stuck open and 8 pretty much the same, she drove it pulling a 20 ft cattle trailer like this for 25 miles or so. #6 plug had gas running off it when I pulled it so I put new GM injectors in the right back. I still have a miss on 6 and 8 but at least it isn't drowning itself, no compression on #6 at all. There was gas in the oil also. I took this in as a favor but I'm covered up and I didn't get the full story when she first called me. I'm stuck with it now so I was wondering if it might have screwed a lifter, or more than 1, up and it's holding a valve open causing no compression? If it sets a couple days now, when you start it the lifter noise is terrible. I got to get it back in in a week or so when I get caught up so I'm just trying to get some kind of idea what I'm up against. If she didn't destroy the engine I want to do a delete on it, who makes the best complete kit to do this? Do I need to do anything with the valve in the oil pan? I avoid these engines, 07 and up, on the account of this great idea GM had when they screwed these engines up so any suggestions would be appreciated.


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vht

Forgot to mention, it has 140.000 miles and do you recommend all 16 lifters, I'm thinking yes, and do I use the cam that's in it? Do I I need to replace oil pump and timing chain?

slothman

this should do the trick https://www.texas-speed.com/p-7379-t...2-engines.aspx

68Formula

This site sponsor sells one with a camshaft: https://sdparts.com/i-24138746-l83-d...3-engines.html

Since there was probably a lot of gas in the oil, probably a good idea to do the oil pump. At 140k, I'd add a timing chain while in there.

vht

I think the SDPC would be the best deal, if I do the cam I will definitely do oil pump and chain. Thanks for the info, I'm going to loosen #6 rockers and put air into that cyl, and see if it does have a lifter holding a valve open.