The Stovebolt Site Forums The Shop Area Engine Shop 45 Chev, 53 Chev cracked block

I used Belzona extensively during my career in the “Nuc” industry, and it was considered to be the “tops in the industry” for epoxy repair products. It was an approved product by the NRC for coatings and repairs to heat exchangers and pump casings that were eaten up by electrolysis (salt water) or cavitation, that were structurally sound. It was also rated up to about 450 degrees which is more that adequate for our Stovebolt engines.

The key to a lasting repair was absolute cleanliness. After sand blasting or grinding anything exposed to salt, we would let it sit for 24 hours to let it leach out additional salt and repeat as necessary. If exposed to oil, we would heat the area with a torch to sweat out the oil and again repeat as necessary. Any cracks were drilled at the ends to prevent the crack from spreading further then vee’d out to create a greater surface area. After coating, let it sit for the the recommended amount of time to adequately cure prior to adding any fluids.

As “52carl” said, if the engine is running like a top,I see no reason not to attempt the repair.