well.....lets see. off the top of my head, about the only components that I seldom replace are the turbochargers. otherwise....be ready to buy a few radiators to the tune of 1100 bucks installed. the rest of the cooling system is plagued with problems starting with leaking radiator hoses. the hoses have been updated and have a white end with double orings. but the leaking hoses result in low coolant levels which results in cavitated front covers(coolant in engine oil) and failed horizontal egr coolers (coolant in #8 cylinder resulting in btoken connecting rod and a new engine). YAY!!! Aside from that.... the fuel injectors are very durable and seldom to almost never have issues, unless.....the hp fuel pump has the slightest drop of anything other than diesel fuel pass anywhere near it. in which case, the pump fails sending debris to the injectors requiring the entire fuel system to be replaced to the tune of $6k minimum. And.... lets say you never experience those problems, you still have the common lifter failure, cracked piston, or other bottom end failure requiring shortblock replacement. when you go to have shortblock replaced....they will probably find a cracked head or two which will add another 2 grand to the repair. commonly....internal fuel leaks cause fuel in the oil which builds up in the CAC and then overfuels the engine causing total melt down. the last ten complete engine replacements that I have performed came in at just under 20 grand. most of these engines dont make it past 150k miles and I've never seen one over 200k miles. other than all of that....they run like a bat out of hell....when they are running.

 

While you're listing the cheap common failures of the 6.4, don't forget the leaking bed plate.

 

It all depends on how you drive and maintain them.... Yeah I agree with bluesbish but.... You obviously only work on the trucks that have problems... So what about all the 6.4s that don't have problems??? I know of a guy who has a 6.4 08 6 speed and has 230k on it. No major issues other than a water pump and radiator, under warranty, other than that it's solid and he beats it (heardsmen truck) I have 109k on mine and personally no problems other than again, a radiator. Obviously the guy above is just listing all the bads and what could happens.... But they are an amazing solid great running truck when u delete them. I came from cummins and I love my 6.4. And I'm not easy on it and it's stock other than the deletes and tuner. I'd have to say they are the greatest out of the box hp and tq in the 08-10 time frame.

 

ive got 145 on mine under warranty was clutch fan, blower motor or air. right out of warranty was the up pipes. cost more to install then to buy parts lol.

here recently my egr cooler crapped out. I already had brought the parts just didn't have time to replace them, made time when it went down lol

 

I really havent done a lot of bed plates. yes, they do frequently leak, but it is usually just seepage and not worth all of the work to try and reseal it. but yeah....add that to the list as well.

 

Strip the EGR and DPF out of it and they are a good engine, I love my 6.4. And chances are that by now it probably already has a new Rad and updated hoses. The EGR and DPF systems are what cause most of the havoc on the engine, especially issues with the rear cylinders. When you buy the truck the first thing you should do is take off the EGR and EGR coolers, replace the CAT and DPF with a straight pipe and get a tuner to delete them. As long as the engine isn't already wrecked then it should be smooth sailing from there

 

Are you referring to the 6.4 or 6.7?

 

Strip the EGR and DPF out of it and they are a good engine, I love my 6.4. And chances are that by now it probably already has a new Rad and updated hoses. The EGR and DPF systems are what cause most of the havoc on the engine, especially issues with the rear cylinders. When you buy the truck the first thing you should do is take off the EGR and EGR coolers, replace the CAT and DPF with a straight pipe and get a tuner to delete them. As long as the engine isn't already wrecked then it should be smooth sailing from there

yup....awesome... smooth sailing until your fuel system takes a dump or you melt a piston, or crack one or a lifter fails or you blow your head gaskets, or your front cover cavitates. believe me....being a happy 6.4 owner IS a temporary state of mind.

 

And 2 out of the 6 problems you mentioned probably won't happen unless ur completely beating the crap out if your truck and holding it wide open and burnin every corner every day..... Juuuuust Sayin.