Blown LNF motor?
Senior Member
Joined: 05-21-08
Posts: 1,006
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From: Creedmoor, nc
blue smoke is rings or turbo seals. However, that would not cause the misfires! I hate to be pessimistic, but with the subaru noise you described I suspect you either have a cracked piston, or a bad valve or valves. You may have a cracked rocker that lead to this.
Did you over-rev or anything similar recently? It may have been several weeks ago when the damage was done and took this long to finally fail..
Did you over-rev or anything similar recently? It may have been several weeks ago when the damage was done and took this long to finally fail..
Senior Member
Joined: 11-11-10
Posts: 2,563
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From: Yonkers, NY
Well I got into the car the other day onto the highway and all seemed fine, except the big blue cloud behind me..
09 cobalt ss/tc
Anyhow at idle it's throwing 44 to 2 misfires constant.
Runs kind rough, sounds like it's missing ^
driving is alittle different kinda jerky at times, no cels yet.
Any boost at 10 or higher leaves blue smoke, gm stage 1 full boost looks like a diseal but blue... Can smell oil just driving normal at times, when I stop and turn it off I smell coolant at times also? I'm lost has ran fine than this...
I was guessing turbo after the first pull and noticing, but after reading seems alot worse..
Opinions and guesses.?
It's going to the dealer Tuesday morning
09 cobalt ss/tc
Anyhow at idle it's throwing 44 to 2 misfires constant.
Runs kind rough, sounds like it's missing ^
driving is alittle different kinda jerky at times, no cels yet.
Any boost at 10 or higher leaves blue smoke, gm stage 1 full boost looks like a diseal but blue... Can smell oil just driving normal at times, when I stop and turn it off I smell coolant at times also? I'm lost has ran fine than this...
I was guessing turbo after the first pull and noticing, but after reading seems alot worse..
Opinions and guesses.?
It's going to the dealer Tuesday morning
I'm sorry just a question to the people who ranted at the OP for killing the turbo
How does the turbo affect a COOLANT smell when the car is off at times?
I agree that the problem thus lies inside the engine and not with the turbo.
How does the turbo affect a COOLANT smell when the car is off at times?
I agree that the problem thus lies inside the engine and not with the turbo.
I'm not all knowing. I barely know how the turbo is setup, but the turbo is oil and coolant cooled. So there is coolant involved.
Im sure ill be bashed again but here is the update
The head is junk, valve guides and rocker arms (Never over reved or bounced off the rev limiter)
The dealer also said this damage has been a problem for some time, probably before I got the car is what is being said.
#3 piston had 60psi and the tear down showed cracked piston ring landings
The coolant smell came from a line that had a small leak that blew apart when the dealer was doing a tear down *The two layers inside the hose seperated*
Anyhow im getting a new piston and rings, and a new head. This was all covered under warranty.
The service guy looked up the previous work done, and said with what was warrantied before the car has had the **** ran out of it, they dealer was really nice and took care of everything and i pay nothing.
Im really happy with gm and the dealer ship considering i dont beat the **** out of my cars, yes i get on it every once in awhile but not like some people i see..
This post was made just for guessing what went wrong, and heres the update ;-)
The head is junk, valve guides and rocker arms (Never over reved or bounced off the rev limiter)
The dealer also said this damage has been a problem for some time, probably before I got the car is what is being said.
#3 piston had 60psi and the tear down showed cracked piston ring landings
The coolant smell came from a line that had a small leak that blew apart when the dealer was doing a tear down *The two layers inside the hose seperated*
Anyhow im getting a new piston and rings, and a new head. This was all covered under warranty.
The service guy looked up the previous work done, and said with what was warrantied before the car has had the **** ran out of it, they dealer was really nice and took care of everything and i pay nothing.
Im really happy with gm and the dealer ship considering i dont beat the **** out of my cars, yes i get on it every once in awhile but not like some people i see..
This post was made just for guessing what went wrong, and heres the update ;-)
Senior Member
Joined: 05-09-09
Posts: 826
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From: Edmonton
If you're smelling coolant and oil.. I'd guess a blown head gasket or cracked head and most likely a map sensor.. but that's just me... and I hear ya about how stupid GM is when you take your car in and they say "drive it" Been there.. done that.. caused more damage.. and damage again.. GM's on their last leg with me personally.. last chance as mine goes back in on tuesday as well.
Oops.. didn't see the update.. glad to see that you're getting fixed after it all. Grats
Oops.. didn't see the update.. glad to see that you're getting fixed after it all. Grats
As soon as you said it sounded like a Subaru I was going to say you are missing a few rocker arms/lash adjusters.
Sucks you bought a car that was beat on tho, seems to be the way with factory fast cars, too many ******** that have no idea what they are doing own them.
Nice to hear GM sorted you out tho.
Sucks you bought a car that was beat on tho, seems to be the way with factory fast cars, too many ******** that have no idea what they are doing own them.
Nice to hear GM sorted you out tho.
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