Re: 05 WK Hemi rebuild...looking for vids or blogs
Sorry to hear about your trouble. This is certainly not normal, but is fairly common, especially with early Hemi's. What year Hemi are we talking about? As your mechanic said, it drops a valve seat and destroys the top of the piston, and probably scores the cylinder wall.
If you've done engines before, the Hemi is no big mystery. It's actually more sophisticated, and runs closer tolerances than 60's-90's engines, but is no more difficult than your I-6's. All you should need is all the proper clearances.....ring end gap, bearing clearances, etc., along with the torque specs. If he plans to keep it, I'd for sure go with forged pistons. If he uses it for towing, you might consider better heads and advancing the stock cam. I advanced my aftermarket cams (4 degrees advance ground into them from the factory) on both my Hemi vehicles ....2 degress on the WK and 6 degress on my LX. So I am advanced a total of 6 degrees on the WK and 10 degrees on the LX. This moves the engine torque/hp range to lower RPM's, making it better for towing. Overall, it's much better in the RPM ranges you normally run at. You should also do some sort of good header (I had mine custom built), either SRT's, customs, or ??? Do a search of my screen name and you'll see what I did and also when I compared the stock WK log manifolds with the stock LX log manifolds, which are easily interchangeable, but will require head pipe modification. Good luck and let us know how it goes.
Edit: Here's a thread that'll give you some ideas: Headers for my 5.7 Hemi
If you want to see pix of the differences between the stock WK logs vs. the stock LX logs, let me know and I'll post them up.
05 LX/RT & 06 WK/GCO, modded similarly, MDS "ON" Light, Vortex Gens, Debadged, DashHawk, BT Catch Can, SRT CAI W/Add Air Inlet, K&N Filter, Sonnax Trans Press Booster, SC Tuner W/Adv Trans Tuning App, DS Tuner, Cust tube headers w/3 in. catback, Bilsteins, SRT frt/rear bumpers, Eibach SRT Lwr Sprgs & Sways, FRI Sidewinder Cam Adv 2*, 6.1 valvetrain, SLP 25% UD Pulley, BBK 90mm TB, SOS Coils/.060 plug gaps. 20 in. SRT Reps.