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I just got the head back from the shop. Measure 0.007 of warp, no cracks, 6 bad valve guides (all exhaust), and the #6 exhaust valve was bent near the keepers.

The bad, no smoking guns as to why the gasket failed. Any ideas? Maybe I didn't get the head torqued correctly? It lasted about 10,000 miles before it failed. It did not mix with oil or get into the cylinders.

 

Unfortunately, I did not grab a picture of the gasket I pulled off, however, I have a doodle of the new gasket as to where it failed. 

 

The red is where the gasket failed, the blue is the path of the coolant. It failed near #2 and #5 and was starting to fail on #3&4. 

1024542383_Headgasketleak.JPG.7b27e7076ccf17bc33c5c50f3da7e0ea.JPG

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I just had the head gasket replaced on the wife's truck.  I didn't even want to allow the slight possibility (even then, anything can happen) for head gasket failure due to a bad head bolt or similar issue and had the shop install ARP head studs when they reassembled.  They did not charge extra for installing them and with head studs, you are likely to get the best possible head clam load distribution possible.  Still does NOT mean that the head gasket cannot fail again but in my opinion sure does significantly reduce that possibility.  I think they are worth the money especially if you plan to make any performance mods to the engine down the road. 

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I did mine back in April of last year. Re used the head bolts since they were still in spec per the Cummins bolt gauge. I went thru 3 torque sequences per the Cummins instructuons. 2 to a set ft pounds, dont remeber the numbers now. And the 3rd sequence was to turn all of them 90* more. Did it with 24" breaker bar. That last 28 turns of 90* more was a job. 35k miles later and its still holding fine.

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