I'm going to do a compression test. When I was driving it last night, I drove it and noticed it had a weird miss after an old Italian tuneup. I shut it down and went to go start it this morning amd it was missing (not a dead misfire) and smoking blue like crazy. It did that until it got hot, and it was still smoking but not as bad according to the driver behind me.

What's the chance it's just rhe seals and not the guide? Can they be done with the head in place? I would think they could with a few tricks up my sleeve and keeping the piston and top dead center so the valve didn't drop. I don't want to do an expensive head job on a $600 car with 301k and Have the turbo seals blow two weeks later. I do like the car though and it's a pleasure to drive.

If it matters this car also had a bad algae issue that has gotten better with biobor. But the smoke smells like straight oil. The dipstick drops too.

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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