6.4 Durability Advice - Ford Powerstroke Diesel Forum
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Old 04-26-2014, 08:53 AM
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6.4 Durability Advice

Got a 2007 6.4 in the shop with 113,000 miles. Had very low compression in most of the cylinders.

Pulled cab and intake. The intake valves are leaking badly. Other than that everything else seems to be fine. Is there something like the valves coking up so badly that eventually there is a no start?

Anyways, we are doing ARP studs, and EGR/DPF delete. Is there anything else recommended at this point. I am not looking for top power but rather reliability and efficiency.

Are the 6.4 oil coolers not an issue like the 6.0's?

What about injectors?
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Old 05-07-2014, 05:14 PM
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If you want to improve the odds of long term success, you should look into o-ringing the heads. The heads must be checked for straightness beforere- installation.

Good luck with it and keep us posted.
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Old 05-07-2014, 06:08 PM
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I would add a set of up pipes from RCD or Rudy's why the cab is off. Stock up-pipes are known to crack especially if you are going to run a 250+ tune. Have not read about a lot of 6.4s having oil cooler issues.
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Old 05-08-2014, 02:17 AM
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Delmer,

Was it turned up with a tune or stock?
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Old 05-08-2014, 02:54 AM
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Quote:
Originally Posted by Kris 6.4 View Post
I would add a set of up pipes from RCD or Rudy's why the cab is off. Stock up-pipes are known to crack especially if you are going to run a 250+ tune. Have not read about a lot of 6.4s having oil cooler issues.
I agree, just replaced my up-pipes with the HD ones from Rudy's.
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Old 05-12-2014, 08:14 PM
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Not sure you need to O-ring the heads just for reliability. A good re/re on the heads (make sure they are flat), prep the block and install FACTORY head gaskets and ARP's and I would consider it done. Up pipes are known to go, mine are stock but its on the things to build for a rainy day list. If you have the heads off, may as well do lifters, push rods and rocker arms. None of these are really all that expensive, and are easily replaced heads off.
Just my 2 cents
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Old 05-13-2014, 04:28 AM
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don't o-ring the heads. I would definitely do lifters and an oil cooler while it's apart
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Old 05-18-2014, 05:53 PM
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intake valves? really? you better look a little deeper or you're going to regret it. How do the cylinder walls and piston rings look?
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Old 05-19-2014, 03:22 AM
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Ok an update. We bought this truck not running and after someone had spent $$$$ at Ford on it.

We took the heads off and they were leaking badly. Got them rebuilt by Noland Head.

We also sent injectors off to be tested and discovered 6 out of 8 had zero flow.

So we replaced HPFP and injectors with Ford remans. Replaced lifters and rocker arms.

ARP studs, EGR and DPF delete. CAT coolant, FASS LPFP. CTS Livewire programmer.

Thing runs like a scared rabbit.

Now it is for sale.
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