Need help from the gurus more experienced than me with motors. I’m tearing down my om606 with 430k due to a dead misfire. The car sounded like it was leaking compression in between the head on the exhaust side. I picked the car up as is. The car was at some shop, for sometime before it ended up at another shop. They chucked in an injector at the problem at some point. Who knows why they did that thinking that would fix it.

What scares me about this is, I drained 12 quarts of oil out of it. It was thin and smelled like fuel. That was awfully scary. So, where I’m at now I’m wondering if I should continue going with this. I have to remove the head to see the damage. Is it worth getting all the valves closed and blowing some air into the injector well while I have all the injectors out to see where I hear a leak coming out of? I’m tinning some serious damage could’ve been done to this cylinder.

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Only diesels in this driveway.
2005 E320 CDI 243k Black/Black
2008 Chevy 3500HD Duramax 340k
2004 Chevy 2500HD Duramax 220k