I got a 2001 Chvy Blazer that I had a cracked block in and replaced the whole enigne with another one I got from a wrecked running 2001 Blazer only difference was the 4x4. After the transplant which all went fine I can't get it started I got spark fuel and everything the only thing we are having problems with is the timing we have followed each step to the T and can not get it started does anyone have any suggestions and how commen is the damper coming loose on the crack and changing the timing marks?