the duke35

Got a 2015 GMC Sierra 1500 4X4 with 6.2L and max trailer package bought new.

Racing shop installed Whipple, cam, & long tubes at 20,000 miles in 07/2015 then BDS lift/35" tires, more boost and meth in 07/2016. Torque convertor failed leading to trans failure so Circle D pro series TC and new stock trans went in 01/2018.


Now engine has obvious valvetrain malfunction...
https://www.dropbox.com/s/26zsqwwwtz...netap.m4v?dl=0

Waiting on oil analysis and oil filter inspection to speculate on extent of damage.
So....if a engine rebuild is required should we keep as is, remove meth, lower boost and get some reliability? Or stroke? Contemplating repairing and selling for a diesel. The truck is fun but it's my DD and unreliability is no bueno.

cyclerage

iTrader: (60)

Engine light on or flashing? Broken valve spring maybe or Busted lifter probably . I've had to fix a few of them.

lxcoupe

iTrader: (9)

Ditch it and get a Duramax. Delete it, H&S, S&B intake, call it a day.

the duke35

Twice, check engine light came on and disappeared after several key starts. Went by auto parts starts to read with scanner...they said multiple codes that related to exhaust (I have LT with no cats). I should have got the actual code numbers.

cyclerage

iTrader: (60)

Post them up. Could be o2 stuck rich due to exh valve/lifter/pushrod issue. Is start with pulling the driver side valve cover off and check for loose pushrods, busted rockers, cracked springs.

gonzo 6.2

iTrader: (8)

Sorry bro for the issues,it doesnt help by saying stuff can happen when modding,get the valve covers off first thing,I wouldnt run it any more,might be save-able now,risk having something gernade

Choda

iTrader: (1)

Wouldn’t hurt to Have another shop look at the tune.

Get it fixed and back on the road.

gonzo 6.2

iTrader: (8)

Wont hurt to have tune looked at,if this is the truck I think it is ,the work was done at a known reputable shop/tuner.

the duke35

Hoping to get them to fix and then maybe get a second opinion on tune. Shop is definitely known and reputable, but not perfect (blown fuse due to improper wiring of boost a pump left my other modded truck on side of road and this truck came back from new tranny install with an exhaust clamp at y pipe expansion joint never tightened). Maybe the small builds are rushed or performed by less experience staff. IDK.

the duke35

Shop says there's metal in oil filter. Here's the oil analysis. Won't have the valve covers off and motor inspected for another 30 days....

https://www.performancetrucks.net/fo...1&d=1529676457