Slowbalt2000

iTrader: (1)

Thought I had a vacuum leak so i took my manifold off. These were rattling around inside??? Anybody have a clue??

Sl0wbaltSS

Well I'll say you're lucky your engine didn't go kaboom.

no_ss

iTrader: (2)

Check the top end?

Slowbalt2000

iTrader: (1)

I think its the top ring. 125psi on cyl #2 and 175psi on the rest.

Sl0wbaltSS

Piston ring? No way that stuff could go from inside the engine, past the intake valves, and rattle around the intake manifold. it the ring broke into pieces your piston and head would be fucked right now

Slowbalt2000

iTrader: (1)

Well theres really nothing else that looks like that that would be able to get past my intercooler.
We shall find out tomorrow. Ive been working on getting the head off.

riceburner

iTrader: (66)

Mother of god...

Maybe.... something at the exit of your intercooler or charge pipe? Like a vband piece or something?

Slowbalt2000

iTrader: (1)

I use all tbolt clamps.

Theyre curved like a ring and theyre pretty hard

ECaulk

iTrader: (6)

I'm guessing parts of your intercooler. Although it could be rings if one locked your intake valve open then potentially it could eject the ring material into the IM. Grab a borescope and pull the plug on #2

Also the low compression on #2 could be due to a bent rod

Slowbalt2000

iTrader: (1)

The car runs fine and doesnt burn any oil, but if i rev it up it starts missing like crazy and running super rough, then it decides to calm down and run fine again.

Slowbalt2000

iTrader: (1)

Im thinking now that it running rough couldve been everytime it sucked a piece of metal back into the cylinder and keeping a valve stuck open. The car literally drives fine except for a slight hesitation when you take off but while cruising every ten minutes itll start missing like crazy again but if you give it like 30 seconds all the power comes back and i can keep driving

riceburner

iTrader: (66)

Big bummer dude it definately looks like a ring and only makes sense with the compression

Slowbalt2000

iTrader: (1)

I just cant wait to see what the piston and wall look like

Slowbalt2000

iTrader: (1)

LNFTX

Oh my
Sorry for your loss

Mr Mall Cop

iTrader: (1)

Well that's not good at all.

07blackg5

iTrader: (8)

this looks familiar!

07blackg5

iTrader: (8)

top ringland is thin as hell. I believe 3mm.

This is a factory 2.2 piston vs a wiseco

Slowbalt2000

iTrader: (1)

Does anyone have a recommendation for exhaust manifold gasket? I was using the lnf on on my l61 head with lnf exhaust manifold, but it looks like it doesnt cover up these weird holes in the head.

07blackg5

iTrader: (8)

I have the copper one ottp sells, but my 07 bead doesn't have the "holes" under 2 and 3 exhaust ports

Slowbalt2000

iTrader: (1)

The holes are on the sides. This is an 07 head

07blackg5

iTrader: (8)

Ah, I thought you were 05-06. this is what I have:
SCE Pro Copper Exhaust Manifold Gasket

Thing seals up like crazy. I've reused it many times now and haven't had a problem yet

Slowbalt2000

iTrader: (1)

I guess ill look around but thanks for the option.

ItalianJoe1

iTrader: (10)

I think you can use a stock LSJ gasket on your head, the ports look similar. I know the LNF one doesn't seal on an LSJ head either.

That sucks about the ring, that's the first time I've seen that happen on a cobalt. VVT engine? Sometimes the internal EGR function of the cam timing causes enough vacuum to pull pieces of stuff out of the intake, seen it happen on other cars but not an ecotec yet.

Slowbalt2000

iTrader: (1)

Nope this is an l61. No vvt here. And i dont think i can use the lsj or lnf head gasket...