Liquid Glass Repair Cracked Block
I have a SBC in my 52 chevy. I bought the motor assembled for dirt cheap. I later found out why.the oil started looking like a tan milkshake. Yeah, a cracked block upon inspection. I bought some liquid glass and have not had a problem since.
For an external leak, there are 2 real choices. K&W Block Seal is the most reliable commercialy available product. The old time car dealers remedy is 'sodium silicate' commonly called 'liquid glass'. Can liquid glass fix a crack in a block? There are much better sealers than liquid glass. Glass isn't used much any more and can be very hard to find. The repair is most likely more money.
The trick is you HAVE to flush your cooling system of all anti-freeze and then follow the instructions on the product.then flush the system of all liquid glass and you are good to go. It did not mess with my heads or anything else for that matter. Everything is fine and it has been around five or so years. I figured what did I have to loose.either the block was junk and the liquid glass would not work in which case the block is still junk. If it worked great i am getting more miles out of the engine. I do not think I would spend the money to have block work done and then put the engine together and then try the liquid glass though as that could be pricey. Thanks a ton!!
The crack is on the outside of the block, left side, and runs horizontally most of the length of the engine. It is just at the bottom of the vertical part of the block, just above where it flares out. Right in line with the petcock at the back of the block.
It runs from about 4' in front of the petcock foreward to near the front of the engine. The oil is free of coolant and the engine turns over so I think it's probably all external.? I got this from a guy who is rodding a '49 truck so I figured it was probably a babbitted 216 like the one in my '48. When I got it unloaded and looked it over the first thing I found was a brass plate rivited to the block which says 'Strout Automotive Engine Rebuilding, San Bernadino, Calif.'
Torrent mame 32 full version. And gives the bore at.030' and rhe rods and mains at.010' plus #4036 and the date of 3/66. I thought --cool! Then I ran the numbers and found it was a 235 from a '53 car with a powerglide.
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This apparently was the first full pressure engine chevy had. Got a really good 216 in my truck whick is all orig. But if the 235 can be saved, I can probably find something to put it in. Thanks for all your help, You guys are a WEALTH of info.! Around here in South Mississippi there's a guy who does a lot of cast iron repair work. He works with one of the junk yards repairing engine blocks taken from wrecked cars (broken motor mounts, etc.) and does a great job.