BBC Heads
#1
Registered
Thread Starter
BBC Heads
I know this probably has been asked numerous times.Can a gen 6 head work on a gen4 block?
thanks
thanks
#2
Registered
Join Date: Jul 2009
Location: Grosse Pointe Farms, MI
Posts: 1,570
Likes: 0
Received 2 Likes
on
2 Posts
To the best of my knowledge a Gen VI head will work on a Gen IV motor, but a Gen IV head won't work on a Gen VI (you can go backward in years, but not forward) as cast. That said, I believe you can machine/cut/drill out the cooling passages on the Gen IV head to make them work on a Gen VI motor.
#4
Registered
Join Date: Jul 2009
Location: Grosse Pointe Farms, MI
Posts: 1,570
Likes: 0
Received 2 Likes
on
2 Posts
I don't think so... I think the Gen VI block has additional cooling passages that the Gen IV doesn't have, so you have to machine the Gen IV heads if you want to use them on the Gen VI block... I could be wrong though. I don't have much exp. with the newer blocks, everything I've done so far is all Gen IV.
#6
And I have Mk IV heads on a Gen VI block. Think it's just Mk IV head on Gen V block that is the issue requiring a special head gasket if you try it.
Last edited by Scarab28; 02-19-2010 at 04:12 PM.
#7
Registered
Starting with a Gen VI block, you can use any head you want (Gen V and VI, Mk IV, or aftermarket). You should not put a Gen VI head on MK IV block. There is a very good chance it will leak water into the lifter valley. Some will work, most will not.
Eddie
Eddie
#8
Registered
To the best of my knowledge a Gen VI head will work on a Gen IV motor, but a Gen IV head won't work on a Gen VI (you can go backward in years, but not forward) as cast. That said, I believe you can machine/cut/drill out the cooling passages on the Gen IV head to make them work on a Gen VI motor.
It is the other way around.
Eddie
#10
Registered
Thread Starter
thanks guys for the info