Which is better 6.4 or 6.7 - Ford Powerstroke Diesel Forum
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Old 07-08-2012, 01:32 PM
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Which is better 6.4 or 6.7

My name is Tyler and a friend of mine is looking at getting a 6.4l. I already own a 6.4 but a friend of his who is head mechanic at the local ford dealership said that the 6.4 is worse than the 6.0 and that the 6.7 is the best thing since "SLICED BREAD"!!! I hope to hear from y'all if you or someone you know has had a lot of problems out of there 6.4. My friend wants to buy one in the next couple of weeks with "CASH MONEY"!!!
Thanks, Tyler
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Old 07-08-2012, 01:55 PM
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A stock 6.7 is better than a stock 6.4. But a 6.4 with dpf delete is far superior to the stock and tuned 6.7. Your buddy says they are the best since slice bread because all he sees are stock trucks.
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Old 07-08-2012, 04:58 PM
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Most the problems with the 6.4 is not motor related. Radiators, egr's etc.
The 6.7 in stock form will beat out a stock 6.4. As stated, pull the DOC/DPF off and a modded 6.4 and a modded 6.7 will not keep up.
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Old 07-08-2012, 06:13 PM
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Tune the 6.7 and you'll void your warranty after all the parts you have to pull off. And you don't want to take the 6.7 beyond 500hp.


Sent from my cell phone while driving down the highway eating ice cream and trying to get the kids to stop fighting.
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Old 07-08-2012, 07:17 PM
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From the head mechanics point of view I agree. I personally do not agree from my point of view. The head mechanic probably has had A LOT of 6.0 in the shop to change head gaskets, so I assume he is use to them and does not like the effort put into a 6.4 head change. The 6.7 from his point of view a "head mechanic" is probably some sliced bread. In a bias opinion that is all you will get, is a bias opinion.

From my point of view(bias opinion) the 6.4 is the only way to go. My dad has a 6.0 and it has had its problems, nothing huge but just some pain in the a$% things. It is still a good motor in a great truck. The 6.7 is good too, I almost bought one before my 6.4 purchase. There were a few things that bugged me(ie seats) that pushed me to the 6.4. Then I tuned it and flip off every 6.7 I cover in black soot. That is my opinion only. Good luck to your buddy and as long as he get a ford he will be happy.
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Old 07-08-2012, 07:22 PM
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6.4 is the way to go in my opinion. 6.4's run great tuned and deleted. But stock for stock 6.7>6.4. just depends if its going to stay stock or not
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