Join Date: Aug 1998
Re: Gen 6 head gasket question
Some Mk IV head gaskets will not have the coolant passage holes between the cylinders. With the lack of end-holes in the block, that will lead to overheating.
The Mk IV head gasket MUST be for parallel cooling, not series cooling, if you have any chance of success.
Beyond that, I can't really help. Never had a Gen 6 block to compare to. I did put Gen 6 heads on a Mk IV block, though. I used Mk IV gaskets. This was on a boat using a non-pressurized cooling system. Good thing, because when I took it apart, I found the gasket was barely sealing in a couple of places.