Block Crack Advice

[36outlaw]

Good day - longtime listener, first time poster.

I am trying to get my 36 3W back on the road with a motor build and need some advice on a crack found in my 59 block - currently bored 40 over.

Mag has revealed the common cracks between the bolt and water holes in the middle of the block. BUT it also has one small crack on the webbing for the middle crank bearing - see red arrow in 1st pic pointing to location. The crack is centered on the window in the web on one side and is at the far right side on the other side.

What are your thoughts on a crack in this area?

My build plans are for a 4 inch crank, 8BA internals with 60 over pistons, Winfield SU-1A cam, 59AB iron heads w/dual carbs

I was planning to pressure test next. Trying to determine if this is the block I should invest in further? Thoughts? I appreciate your help.

 

[Bored&Stroked]

I've seen those types of cracks before and since you're not building a full-on race engine, I would drill the end of the crack (all the way through) and be done with it. I don't believe you'll ever have an issue at the horsepower levels you'll be at.

I built a 304 cubic inch engine 3 years ago with the same crack and it has been running strong ever since.

 

[cadillac512]

I've seen those types of cracks before and since you're not building a full-on race engine, I would drill the end of the crack (all the way through) and be done with it. I don't believe you'll ever have an issue at the horsepower levels you'll be at.

I built a 304 cubic inch engine 3 years ago with the same crack and it has been running strong ever since.

Agreed. Stop drill the end of that crack and it won't go anywhere.

 

[36outlaw]

Thanks so much for both of your replies. I appreciate it.