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Now for the last set of pics. A 3100 head on a 3.4 DOHC block.
Once again, just like with the DOHC head on the 3100 block, it bolts right up. I don't have a headgasket to show the comparison, so this is just the head on the block.
Remember that oil passage I told you about? Here it is again. The 3100 head only halfway covers it.
Remember those coolant passages that the 3.4 has, but the 3100 does not? Here they are exposed on the block. The head does not fully cover them, so this is a MAJOR problem.
And here is the oil valley feed holes in the 3.4 DOHC block, but the 3100 head does not cover them.
