Very basic question, from a guy just getting started...
Just inherited this tractor (1959 Case 510B). My first project is to replace the muffler. Currently, there is no muffler, nor elbow. I can order both. (Elbow is about $45, while manifold is around $150) Both bolts (for attaching the elbow to manifold) are snapped off flush. Previous owner snapped off one, I did the other. I am wondering what is best to do next. I"m an experienced woodworker, so I can drill a straight hole, and I"ve done a little metal-working, but I have minimal mechanical experience. I spent a week trying to coax the bolt out, using PB Blaster, and the stud left inside is there to stay, completely seized. I thought I would attempt to drill out oversize and tap (either moving up a bolt size or using a helicoil. I"ve never done this before, but my other option is to remove the exhaust manifold from the head, and, if I mess that up, then I might have a bolt sheared off in the head, rather than just a bolt sheared off in the manifold. Those bolts look pretty rusty too, but the nuts are brass or something, so maybe easier?
Advice please?
Does this sound like a reasonable course? Is drilling/tapping cast iron doable? I understand that the procedure would be to attempt to drill centered and straight, so center-punch, drill pilot, and then drill progressively larger holes. I would be doing this with a hand drill, but the access is easy, so I think I have that in my favor.
I realize this is a pretty basic question, but it"s where I am, I guess.
Thanks,
Colin
Just inherited this tractor (1959 Case 510B). My first project is to replace the muffler. Currently, there is no muffler, nor elbow. I can order both. (Elbow is about $45, while manifold is around $150) Both bolts (for attaching the elbow to manifold) are snapped off flush. Previous owner snapped off one, I did the other. I am wondering what is best to do next. I"m an experienced woodworker, so I can drill a straight hole, and I"ve done a little metal-working, but I have minimal mechanical experience. I spent a week trying to coax the bolt out, using PB Blaster, and the stud left inside is there to stay, completely seized. I thought I would attempt to drill out oversize and tap (either moving up a bolt size or using a helicoil. I"ve never done this before, but my other option is to remove the exhaust manifold from the head, and, if I mess that up, then I might have a bolt sheared off in the head, rather than just a bolt sheared off in the manifold. Those bolts look pretty rusty too, but the nuts are brass or something, so maybe easier?
Advice please?
Does this sound like a reasonable course? Is drilling/tapping cast iron doable? I understand that the procedure would be to attempt to drill centered and straight, so center-punch, drill pilot, and then drill progressively larger holes. I would be doing this with a hand drill, but the access is easy, so I think I have that in my favor.
I realize this is a pretty basic question, but it"s where I am, I guess.
Thanks,
Colin