well i fired off an email to intense, ill wait and see what they say

in the meantime, i pulled the rear cover and found that the bolt for the #4 cylinder rocker unscrewed itself, i mean i was able to take it off by hand by the like 3 threads that were screwed in. I know we torqued the bolts right and we double checked them before putting everything back together.

so it looks like the rocker, pushrod, and valvespring retainer are damaged, and maybe the top of the valve stem, it has a couple marks on it.

Did you reuse the bolts? They are torque to yield and "supposedly" each bolt of that nature should not be reused.

Ok, something doesn't register with me brain. If the rocker was that loose then one of the valves wasn't opening; correct?

If it was the intake valve then the plug wouldn't get wet, the o2 wouldn't see anything from that cylinder and then what? Rich, Lean, or Normal. I would guess 'normal' since I don't see why 2 or 6 would be running rich. Fuel would begin to pool in the runner. Is the intake stroke cylinder vaccum enough to suck in fuel? I would think not unless you were in need of head work.

If it was the exhaust valve then the intake valve would open, air and fuel would enter, then fire. The exhaust would find no way out until the intake valve opened again and then what? BANG - you get a nice backfire?

So I don't see why fuel would be reaching the o2 sensor unless the injectors are the wrong.

Someone help me think right.

they were brand new from the dealer bolts, and the old ones were discarded.

honestly i have no clue why it came undone

Was the rocker off enough to not open that valve at all? If it was somewhat still on there, the valve could still be opening a little bit.

From Intense'* site
"97 and earlier Series II 3800 engines should use CompCam Highload Valvsprings."

If the rocker comes off it'* pedestal, it can jam a valve slightly open, then take a beating. This would also make the bolt come loose, or appear looser than it would if it were installed on a good rocker arm. I've seen and experienced this personally with the HS rockers.

It came undone partly due to installation error, but complicated by the inaccessibility of the rear bank and the poor design of the pedestal.

Don't kick yourself. You're not the first. I just wish you'd posted BEFORE you installed them so we could warn you to be VERY careful. Shadd learned his lesson, and the replacement rocker is doing fine now.

Hopefully intense still has some replacements, otherwise im screwed i guess...

I suppose the rocker is still useable but i would still prefer a replacement over using it

I would have posted before i put them on, but it was a spur of the moment thing, i was sleeping in bed and all of a sudden my buddies showed up and dragged me out of the house to install them

Do NOT reinstall that rocker arm. Inspect the pedestal rail, the pedestal, and the rocker VERY carefully.

Thanks for clearing that up Will.