FIL and I are tracking down an intermittent clunk in his 400 CI Chevy. We thought it was a cracked flexplate but that was not it. We ended up pulling the engine and trans out together as the bellhousing bolts were a total PIA to loosen in car.
When we pulled the plugs we found this(number 8 cylinder). Obviously, something has been hitting the end of the plug.
In all my years of working on hot rods and running Chevys hard I have never seen a plug this beat up.
Anyone want to hazard a guess as to what we will find once we open the bottom end?
