6.4 vs 6.0 are they on different levels? - Ford Powerstroke Diesel Forum
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Old 06-23-2010, 01:02 AM
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6.4 vs 6.0 are they on different levels?

How do they compare, Is the 6.4 a way better motor then the 6.0. What are the major porblems with the 6.4 if there is any. I have not heard much about the 6.4 and just started looking into it so i want some feed back for u guys that went from a 6.0 to a 6.4, or just what you know about the 6.4. Is there any must adds or mods to do to it. Thanks guys.
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Old 06-23-2010, 02:05 AM
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Must adds dpf delete with tuner to get better mpgs and power, the only weaknesses is the mpg stock, but the power and turbo spool is crazy fun, I would take a 6.4 over 6.0 anyday, You don;t have to worry about EGR exploding or heads on the 6.4, some of the job1s early 08's really any 08 produced in 2007 had some radiator issues but my 09 has been golden
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Old 06-23-2010, 02:35 AM
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I can help you with some insight here. I owned an 2004 6.0L and now own a 2010 6.4L. Everything that I will say is my opinion ok Now, my 04 was a great truck…except for the 6.0L PSD under the hood. I had problems from the first week that I owned it (bought it used) (the oil cooler went out). The times that the 04 wasn’t in the shop it ran great. I had 4’ exhaust with a performance diesel muffler and a SuperChips tuner. I got around 20mpg and plenty of power. So I didn’t have very good luck with the 6.0L. It was a kick a$$ motor….when it was running. In fact the truck broke down for the 3rd time in 3 months and that’s when I traded it in for the 2010.

Now the 6.4L, to be honest it’s hard for me to do a fair comparison. Since my 2010 is under warranty I don’t want to void it by putting exhaust or a chip on it. I’ve yet to have any issues with it. It has plenty of power and I’m sure with a chip and exhaust it would be awesome. I do like the fact that I can pull up to a drive through and order without having to turn my truck off. The truck gets 12mpg on average... and that stinks.

Based on everything that I’ve read and personal experience… I like the 6.4L.
When the warranty is up then off comes the stock exhaust and I’ll put in a tuner.
By the way… just my opinion
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Old 06-23-2010, 11:49 PM
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Owned two 6.0s and had no problems,
06 F-350 King Ranch CC DRW LWB 4x4, and an 07 same....

I did my studies on both with the 6.0 and did my studies on the 6.4 and here is what I came up with...

There was nothing wrong with the 6.0, it is just that the EGR coolers, head gaskets, and head studs, were not up to raising HP with Tuners...

Since Navistar got so much massive $hit thrown its way over people that were able to stretch head studs, blow head gaskets, and EGR coolers, in my opinion the OVERBUILT the 6.4... Bigger EGR Coolers (2), stronger lower end with bedding plate, and larger head bolts... I think this engine will be around for a long time...

Its only short coming is NOT THE ENGINES FAULT, it is the Cat and DPF system that chokes it up and burns fuel to clean itself in cycles. You get a 25% to 30% fuel economy increase towing, when you Tune it with SPARTAN and do away with Cat and DPF.

In summary from a fair Engineer, the 6.0 was good, but not built to be tuned to higher output. The 6.4 is OVERBUILT to save Navistar (International Harvester to me a dinosaur) reputation, and I think they did an outstanding job of it...

09 F-450 CC DRW LWB 4x4, Air Brakes added, Air Suspension added over, Spartan 210, Clean Exhaust, Warn Winch, Cow pusher front bar, and more....
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Old 06-24-2010, 08:49 PM
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So sounds like they did a bad job on the 6.0 and a great on the 6.4 in nutshell right?
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Old 06-24-2010, 08:53 PM
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I never had a bit of a problem with my 06. Only thing I did was stick a cold air intake on it though. reason for not having it anymore.... Got totaled out. my 2010, bulletproof as well. only bad thing is the milage, but like stated earlier, its not the engines fault.
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Old 06-24-2010, 09:29 PM
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Quote:
Originally Posted by FordDiezel View Post
So sounds like they did a bad job on the 6.0 and a great on the 6.4 in nutshell right?
Look, I am a fair Diesel Engine man, 20 years living with all typs on yachts, almost 40 years with diesel trucks and NO I think they did an OK job on the 6.0, they just did not anticipate the HUGE TUNER Horsepower a lot of people were going to play with...

I had 2 F-350 6.0 King Ranches, never a problem... In my years with the 6.0 and this Forum reading problems, my guess is as much a 95% of the problems were caused by hopping that engine up. Of course people will not admit to it for the most part. And of course, Navistar could not have anticipated this....In all fairness to them, if they faulted at all, they just built the head studs, gaskets, and EGR coolers a bit too close to maximum capability for the 6.0 when some people hot rodded them to 50% to 100% more output and had problems. I cannot see that is Navistars fault. I do however believe the 6.4 was built to correct all of that for Navistars reputation...
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Old 06-24-2010, 11:32 PM
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Quote:
Originally Posted by Lone Ranger View Post
Look, I am a fair Diesel Engine man, 20 years living with all typs on yachts, almost 40 years with diesel trucks and NO I think they did an OK job on the 6.0, they just did not anticipate the HUGE TUNER Horsepower a lot of people were going to play with...

I had 2 F-350 6.0 King Ranches, never a problem... In my years with the 6.0 and this Forum reading problems, my guess is as much a 95% of the problems were caused by hopping that engine up. Of course people will not admit to it for the most part. And of course, Navistar could not have anticipated this....In all fairness to them, if they faulted at all, they just built the head studs, gaskets, and EGR coolers a bit too close to maximum capability for the 6.0 when some people hot rodded them to 50% to 100% more output and had problems. I cannot see that is Navistars fault. I do however believe the 6.4 was built to correct all of that for Navistars reputation...

Thanks for the insight. I should have use a different word other then "bad", it was just the first thing that came to mind.

Last edited by FordDiezel; 06-26-2010 at 12:45 PM.
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Old 06-26-2010, 06:30 AM
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I have had both and IMO the 6.4 is hands down a better engine...soooo much potential for power and decent economy once you get the emissions crap off.


To be honest us first gen DPF guys kinda got the shaft....somewhat like the first models of gas vehicles that had cat converters on them...but as time has gone by its been figured out how to still get power and clean emissions while maintaining economy..ie: 6.7 engine.
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Old 07-22-2010, 07:24 PM
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Just took a 6.4 for a test drive... not a fan... O well next is 6.7 .
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