Took a chance on a used 12HT and lost....

[DieselFJ]

All, I've posted in the wanted section, but I thought I'd post here as well. I purchased a used 12HT in hopes I could rebuild and have a solid motor, but I just found out it has a crack in #6 cylinder that showed up when magnaflux'ed. I don't have a photo at this time, but it looks like every cylinder has this marking but only #6 shows to be cracked. Maybe a casting issue with the heads? Anyway, anyone have a good head available? I don't think I could recover the cost I am in it now by parting it out so I'm all in at this time.

Thanks
Scott

 

[dmjay]

I think you might have better luck finding someone who can weld it up for you.
A good head would be difficult to get your hands on.

 

[DieselFJ]

Yeah, working that avenue as well, just wanted to see what may be out there. Here is a photo of the crack, it’s on cylinder 6. Thinking maybe pining it would be an options as well.

 

[relaxedcruiser]

I would not be totally concerned with that crack, I dont know how far the next water jacket is away in that particular head, but I know for sure that some reputable manufacturers have actually guidelines in which cracks in this position are tolerable if they don't exceed a certain width. That applied to aluminium heads though. your one It is probably weldable too.
Just my 5 cts

 

[DieselFJ]

I would not be totally concerned with that crack, I dont know how far the next water jacket is away in that particular head, but I know for sure that some reputable manufacturers have actually guidelines in which cracks in this position are tolerable if they don't exceed a certain width. That applied to aluminium heads though. your one It is probably weldable too.
Just my 5 cts

Thanks, I’m on the fence along with the machinist. Just want to make sure in the end the motor will be solid as I want to put miles in this when it’s done, so at this time it’s leave as is and see what happens, pin repair it, weld it, buy a used head, or it looks like Terrain Tamer might have a new one available, but the cost is crazy expensive.

Thanks for the input
Scott

 

[dmjay]

My vote is to weld it.