I would be very interested in any info you can provide about this Cylinder head issue. The only place that the head can cause fuel to get into the oil is the low pressure return port at one end of the head. It usually has less than 7 psi so it is unlikely that this is the problem.
I did get 3 heads (One that was never installed) back from one dealer who claimed that this was leaking (Externally) and that they could see the crack in each head with a bore scope. I personally checked each head and found no problems with any of them. The so-called crack that this dealer saw was a casting line. This dealer eventually changed the engine to correct this problem only to find that the fuel leak was still there. They finally discovered a leaking function block was the source of the leak.
Like I said above, Please provide me with any info concerning this issue so I can investigate it.
Member #4883
My diesels
97 Chevy C-3500 Dually, 6.5TD
85 VW Jetta 1.6L N/A
85 Mercedes Benz 190D 2.2 N/A
85 Surburban 2500 4x4 6.2 N/A
83 Chevy G-30 Van 6.2 N/A