small Hemi? There is only one Hemi for 2008 on that vehicle... the 5.7L
With that said, the startup "Slap" sound is a common reported nuisance "problem." Use a good oil and change it on time.
Additionally there is a known issue with the heads but someone with more knowledge will need to chime in. I have the 5.9L expertise.
Last edited by IndyDurango; 10-09-2012 at 10:53 PM.