Well I am pretty sick to my stomach right now. I installed my d1 procharger, gauges, and blackbear tune this week. Truck (2011 6.2 Silverado 39k miles) started and idled fine. I took it around the block last night and never went above 3/4 throttle and just rolled into it. Truck pulled hard boost stayed below 8psi and air to fuel was a tad rich. On the last road before my house I did one more 3/4 throttle run up to about 90 and when I let off I heard a bad tapping. I thought I blew a belt and it was flinging around but when I pulled it in garage I could defiantly hear it was motor noise. Extreme bad rod knock. I'm guessing it spun a bearing but I am at a complete loss on how.

So any sure way to check? I was thinking about dropping the pan and inspecting what I could. All I've been thinking is wow this is going to be expensive. If it did spin a bearing what all is usually trashed and what can be re used?

 

Also no check engine lights at all which is weird to me

 

check oil, if spun bearing you would see it in oil

it could of been hurt piston from a starter tune and beating on it

 

Pull valve covers first,check top end first,cuz its easy

That sucks bro,sorry for the bummer deal

 

Had the same thing happen to me when I installed my turbo. Checked everything. Couldn't find the problem. Tore apart block and found 7 of 8 rods bent. Those powder metal rods are junk. Never went over 4psi. Now it's honed and forged 416ci. Good luck with yours. Hopefully it's something inexpensive.

Piston slap - not my pic but this is what my rods looked like.

 

Man that really sucks. It's hard to know exactly what may be wrong. I would do all that was suggested above. Inspect the valvetrain, check the oil for metal shavings, and the final part would be to pull the heads and take a look at the pistons.

 

How did you vent the crankcase/set-up PCV system? Is there oil underneath the truck?

 

No oil under truck, Directions said to cut the pcv line and install a check valve, which I did and I just checked it is pointed in correct direction

 

Cylinder PSI
1-180
2-175
3-185
4-160
5-160
6-30
7-150
8-160

No water or shavings in oil. Popped valve cover off do not see anything broken

 

Piston hurt, get new one installed and get it tuned. Don't run it hard until it is tuned.