On my '74 spider, everytime the engine shuts off, including starting attempts when it doesn't start, I get a loud squeek. I thought that my timing chain was so loose that it was hitting metal when it slacks up, so I used the exterior bolt to allow the tensioning spring to take up the slack, but this didn't help. This still might be the problem and the tensioning spring is just ineffective but, before I went in to tighten this by hand, I wanted to see if anyone had other ideas. The fan belt is sufficiently tight and doesn't seem to be slipping. Thanks in advance for any suggestions, Paul.