Deus_Vult
Seaman Apprentice
- Joined
- Oct 5, 2021
- Messages
- 31
Hi guys, I'm new to the forum, although I have lurked here for awhile.
Basically, I have been repairing and rebuilding the powerhead on my 1967 Mercury 500 Thunderbolt due to an unrelated issue. While doing this, I noticed that there is a 1.25 inch crack running along the outside cylinder wall of the #3 cylinder. Thankfully, there seems to be no damage done to the inside cylinder wall, and the crack seems to stop at the seem between the two (outside cylinder wall and inside cylinder wall). You'll notice in the pictures that there is a large roundish mark close to the end of the crack; this is from a power drill that I was using to remove a broken screw, and the the drill splipped and hit the powerhead; I'm not sure if this is what caused the crack or not, but I feel like I remember the crack being there before.
Anyways, I'm wondering if there's any way to fix this? I did some research and found that TIG welding can be used on engine blocks when they're cracked, as well as metal stitching, and I even saw JB-Weld used by some people. I guess the reason I'm posting this is because I want to see what you guys think is the best option for me, given the location of the crack as well as the size, as I know there are people on this forum that are far more knowledgeable than I am.
I was formulating a plan in my head that consisted of chasing the crack with a drill, then possibly filling it in with JB-Weld, or just using JB-Weld on it; however, I'm not sure if either of these would work, once again given the location of the crack and the size. I'd rather not replace the engine block because it is expensive, and I have already spent a lot of money on repairs for this motor. Any and all input is greatly appreciated.
Thanks
Basically, I have been repairing and rebuilding the powerhead on my 1967 Mercury 500 Thunderbolt due to an unrelated issue. While doing this, I noticed that there is a 1.25 inch crack running along the outside cylinder wall of the #3 cylinder. Thankfully, there seems to be no damage done to the inside cylinder wall, and the crack seems to stop at the seem between the two (outside cylinder wall and inside cylinder wall). You'll notice in the pictures that there is a large roundish mark close to the end of the crack; this is from a power drill that I was using to remove a broken screw, and the the drill splipped and hit the powerhead; I'm not sure if this is what caused the crack or not, but I feel like I remember the crack being there before.
Anyways, I'm wondering if there's any way to fix this? I did some research and found that TIG welding can be used on engine blocks when they're cracked, as well as metal stitching, and I even saw JB-Weld used by some people. I guess the reason I'm posting this is because I want to see what you guys think is the best option for me, given the location of the crack as well as the size, as I know there are people on this forum that are far more knowledgeable than I am.
I was formulating a plan in my head that consisted of chasing the crack with a drill, then possibly filling it in with JB-Weld, or just using JB-Weld on it; however, I'm not sure if either of these would work, once again given the location of the crack and the size. I'd rather not replace the engine block because it is expensive, and I have already spent a lot of money on repairs for this motor. Any and all input is greatly appreciated.
Thanks
