Just got word from the dealer that I have a blown head gasket. It is right at 10,000 miles. Anyone else have this issue??? 2011 5.7 hemi
The check engine light came on after it started running kinda rough. Took it to autozone (since it was Sunday) and their code reader said it was a mis fire on cyliner #7, vacuum leak.
They are replacing the head gasket under warrenty anything else I should be worried about?
Thanks

 

I'd do a few VERY frequent oil changes after the fix to get any coolant or other contaminants out of the engine. Did the oil get "milky" ?

 

I'd use marvel mystery oil or seafoam so wash the sludge out from the valleys and walls. Oil itself won't touch the built up coolant sludge if you actually have any at all?

Seafoam, I would pour in and only run maybe 50miles. Marvel Mystery oil, you can run for an entire oil change, but I'd use it for 2-300 miles and then do an oil change.

 

Only thing i would worry about, is if the stealership monkey`s did the job correctly.

 

I would ask the mechanic why the failure occurred. Did you overheat the truck? In all of my years, the few times I had blown head gaskets, it was usually overheating. When I put my engines back together, I would take the heads and have them magnafluxed for cracks and checked for surface flatness. I would ask the service department if they did that. If they just changed the gasket, I would be unhappy.

If they can't tell you why it failed, and you did not overheat the truck, then I would be worried it would happen again.

 

See it often in 4.7s that over-heat but it's relatively rare in the Hemi. I'd be curious to know what they think the cause was...

 

Rule #1: Head gaskets do not blow for no reason

Like Pedro Dog, the only time I have ever blown a head gasket on any of my vehicles was due to overheating, i.e., broken belt, damaged radiator/coolant loss, busted hose, busted freeze plug, etc.

Aside from the others' recommendations, once you get the truck back I would want to take it to an independent speed shop & pull all the plugs (all 8) and run a compression test on every cylinder, with special attention being paid to #7. Worth the hour or so's labor it'd take.

An OBDII code of P0307 (#7 misfire) can very easily be caused by a dozen different things, one of them being a hairline crack in the cylinder head, i.e., one that you cannot see without the aid of a black light & inspection fluid. You would want to do this with the head laying on the bench, fully disassembled (valves removed). - tip, number the valves/locations before pulling them out.

See Rule #1, above

Also, any of their shop monkeys can pull it down. Putting it back together takes a well-qualified & well-experienced tech.

 

Thanks for the feedback. Did not have any overtemp issue, or at least there was no idiot light or high temp reading. That was what was also causing me to ask the question on here to see if others also had the issue. Appearently this is a unique situation (lucky me!). I pick it up in the morning and I will see what they have to say about it.

 

Thats the first I've heard of a Hemi with a blown head gasket. Did you have a tuner on it?

 

our work trucks are having head gaskets redone on a reg basis. they are diesels tho. actually 4 have blown in just under 2 weeks.