Mark IV Crank Gen VI Block
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Mark IV Crank Gen VI Block
I am trying to put some engines back together. I have a Mark IV crank and Gen VI block, pan, front cover, and Mark IV heads.
Can I run this package together and if so what would I do for the rear main seal?
Thanks for the help
Can I run this package together and if so what would I do for the rear main seal?
Thanks for the help
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The coolant transfer holes on the Mark 6 block were revised from Mark 5, the 6 holes should be small round holes to accept Mark 4 heads, so the heads shouldn't be an issue either. Is the 6 a Bowtie? Even my Mark 5 bowtie has round coolant holes so the Mark 4 heads work well. I have always run the Mark 4 crank with an adapter and no problem. Just be sure when you install the adapter that when you sela it in, let the sealant dry then torque or you will have a leak.
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mrfixxall
you cant use a markIV crankshaft in a gen VI block,it would be impossible to get the 1 piece rear main seal over the rear counter weight on the crank.. look on ebay for a forged crankshaft,i see them all the time for 200-400 bucks..you will also need a flywheel for a gen 6 as well..
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I know that adapter works with gen V. Don't know about gen VI??
Ben IV heads, no problem. Make sure you use the good marine fel pro gasket.
Good luck and keep us posted
Ben IV heads, no problem. Make sure you use the good marine fel pro gasket.
Good luck and keep us posted
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The crank will work fine. I have a adapter I can hook you up with. It is at the machine shop with my ruined block. I will pick it up this week and I can send it too you. You will need a gen 6 pan and timing cover still. You will use a two piece rear main with the adapter.
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