The 6.4 is actually a great engine. The problem is the the emissions for the most part and owners who think they are driving a 7.3 and maintenance can go by the wayside. I will admit the 6.4 does have some downfalls but if taken care of properly there's no reason it won't last. We are starting to see lots of guys over 300k now with minimal issues. Also if these 6.4 are neglected they will be nothing but a headache.
I agree the 6.4 has some great features. Like all engines, it has flaws too, but maintenance is a definite need with the 6.4 and the emissions crap really helps expose the flaws
Radiator - Junk
Early radiator hoses - not very good
Early degas setup - bad
Factory water separator - less than optimal
Pistons can be a definite issue especially on tuned trucks and high HP trucks - definitely can be problematic
Plastic Clips and Rocker oiling -not great and is a problem on non-DPF deleted trucks
K16 does seem to hold up quite as well as a CP3
Like is the case with all common rails, a leaky injector will melt the piston if not caught early (and that isn't always possible)
Up pipe failures especially on tuned trucks
Bottom end is very stout (unless you count pistons) - as strong as anything made in this century
Stock turbos to hold up well even at 550-600HP
Valvetrain - other than mentioned above, very good from the factory
Very stout factory auto and manual trannies and good overall drivetrain
Factory IC works well for its intended use and holds up well except the earlier builds having condensation issues
I am sure I missing a few things, but that's my basic run down.
2008 F350 ZF6
No Limits CAI and every air mod, MM w/ GH, DPF/CAT delete 5", Sean's 4" DP, SB DD 3850, Coolant Filter, Bushwacker flares, 2.5" Icon level, SD inserts tailgate/grill, PMF Tbars w/ 5" block, Elite EGR delete, Junior High Power Atmo, ARP studs, A-1000 (Marty's), Fuel Bowl Delete, 15% nozzles, Tial WG
God Bless our military!!!!
Please see this thread: