No wheels are turning. Like I stated previously in this thread that even though is valve may be failed, the clack is because the guides are broken/cracked and/or your mechanical adjuster is failing. Applying pressure to the broken guide is only going to mask the sound of an issue that could lead to engine fatality. Every time we have a customers car in here for timing chain jobs with warm start rattle, replacing the broken guide with the new updated guides and new adjusters have solved the issue.