DO block crack

[Patsdeere]

I have a DO with a nice little crack (about 4-6 in) right behind the carb. I think it is only in the outer jacket, but have no idea since I haven't ripped into it yet.

I was wondering if it could be fixed (relatively easily) or am I better off switching it with an engine off of a D that I have?

Thanks.
Have a great Turkey Day.

 

[khyron]

JB weld should do the trick, even with a water leak.

 

[Robert Huntress]

If it is a crack, you will need to drill a hole at each end of the crack to prevent the crack from growing. I would highly reccomend that you remove the block from the tractor, unless you are a very experienced welder, mount it on an engine stand and rotate the block until the crack is facing upward. Then sand all the paint from the area and grind a V along the crack. You will need a high nickle welding rod. I use nickle 97, but since that is hard to come by, you will have to check with your local welding supply store. Depending on which rods you have, you may have to preheat the area. I have never had to do so, but others tell me they have had better results by preheating the area, because of the rods that are in use today. If you are not comfortable with welding, you may wish to remove the block and take it to a welding shop. The cost is reasonable, in most cases, but that is for you to determine. If you decide to weld it yourself, do not think that you need a fancy welder. I have welded many blocks with the old Lincoln dog house welder. Share how it turns out, please.

 

[Richard G.]

Grind a Vee and get it very dry. Clean with brake cleaner and let dry. Put in high temp silicon and force in crack with your finger. Let cure. I did a crack the full length of the block on a 50 Chevy pickup about 12 years ago and it still holds antifreeze.
Richard

 

[Anonymous-0]

I would grind a "V" in it and hit it with a little electric weld for strength and fill the remainder in with J.B. Weld. When finished, grind the surface smooth.