Ok I got a rebuilt engine from a great company but, while I was diagnosing some things and only used water for the coolant. Here in Louisiana the weather is crazy. Freezing one day and warm the next. Caught me on a freezing night and forgot I had just water in there. Went yesterday to change some pushrods. My mechanic friend noticed a freeze plug laying on the motor mount. I was like it can't be but it was.the freeze plug had the company stamp on it. I'm thinking change the ones on the side of the block. Are there any in the rear that the coolant flows through? I'm going to use the rubber plugs and see.hoping my block isn't cracked. A temporary fix.is it possible the oil plugs popped too?