So I continue to find issues with the " rebuilt " 235 I bought. Not only did my rear main seal install not fix the leak I'm having, it now has a quick knock right at start up. What's weird is that it goes away instantly and is not heard again till the next time I start it. The engine is super quiet, runs strong and besides the leak, it's great. I have heard of something called the " Chevy Knock ", is this what I have?????
'59-'62 235
