Great info - thanks

I thought there was a TSB for the auto-tensioner. I don't want to spend $550 for the timing belt and I get the same problem again because I didn't change out the auto-tensioner. If the auto-tensioner wasn't working probably, then the timing belt would be a little loose - could this be causing the grr sound. I searched the forum and it looks like its the auto-tensioner.

again thanks for all the help.