D8 D342 head info

Ream the smaller guides to fit the old valves. I assume the old ones are serviceable?

Need the actual casting number for identification. As stated ream or change guides if valves are good.

Could it be a spacer plate head? If so you will have other problems with directors.

Wombat

Could it be a spacer plate head? If so you will have other problems with directors.

Wombat

Hello All
Thanks for the replies.Yes the valves are good but the guides can't simply be reamed out to suit the valves as the guides are missing the flange at the bottom to locate the bushing that the rotocaps sit on. My concern is that this is off a much later machine and as Wombat mentioned it will have other issues.

I am getting them to lap the valves on the other head and once they are done I will pick them up and inspect them for casting numbers. They are about an hours drive from where I live.

So I finally get the heads back last week. I went over them today and other than the valve guides and a few minor differences in the casting I cant' see any difference in the two heads. The head gasket fits both, the directors appear the same and are in the same holes. I think I will need to remove a valve guide and measure it up to make sure the bore is the same and then get some new guides.

Quick question though, Wombat mentioned if the head is off a spacer plate engine that there would be problems with the directors but I can't understand how this would be a problem provided the holes in the head match wouldn't the cooling properties be the same or even improved? My understanding of a spacer plate engine is that there were no differences in the head but the block had a spacer to prevent liner damage.

Thank you very much Wombat.With that information I am confidant that the head will fit as the old head gasket matches the head perfectly and it has the directors.