Best built 6.4 long block

[Orange Stroker]

When a 6.4 breaks it usually ins't cheap I think is what he is getting at. These trucks are really pretty solid enough that when they break they go for BROKE!! Usually the main issues are emissions (2-6k depending on ****** or replace), Turbos (3-6k), Headgaskets (4-12k depending on injectors, cracked heads and things like that), Cam issues (Put a new motor in 15-20k), Cracked piston (15-20k), I can keep going but these trucks are usually never a couple hundred - 2k repair costs. They are almost always 2k+++++ which is = very expensive for most people.

 

[bigrpowr]

When a 6.4 breaks it usually ins't cheap I think is what he is getting at. These trucks are really pretty solid enough that when they break they go for BROKE!! Usually the main issues are emissions (2-6k depending on ****** or replace), Turbos (3-6k), Headgaskets (4-12k depending on injectors, cracked heads and things like that), Cam issues (Put a new motor in 15-20k), Cracked piston (15-20k), I can keep going but these trucks are usually never a couple hundred - 2k repair costs. They are almost always 2k+++++ which is = very expensive for most people.

i feel like i've experienced everything listed, 3 times . LOL

 

[Black AOD]

i feel like i've experienced everything listed, 3 times . LOL

Lol. What are you talking about ?!

I had loads of fun putting a fresh built motor in mine 7 months after I bought it, then a comp Trans a month later. Then 2 years later that "built" motor had 3 cracked cylinders and this was another trans rebuild later and 2 fuel syetem replacements!!!

It was great time.

Said no 6.4 owner.

#iguess900hpbreakssh*t

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[dsberman94]

Lol. What are you talking about ?!

I had loads of fun putting a fresh built motor in mine 7 months after I bought it, then a comp Trans a month later. Then 2 years later that "built" motor had 3 cracked cylinders and this was another trans rebuild later and 2 fuel syetem replacements!!!

It was great time.

Said no 6.4 owner.

#iguess900hpbreakssh*t

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Your 6.4 was also beat to chit when you bought it. I wish I could see some of the tire roasting that thing did before you had it.

 

[Black AOD]

Your 6.4 was also beat to chit when you bought it. I wish I could see some of the tire roasting that thing did before you had it.

I know it was, I know better than anyone on here that it had been.

I've got the videos of it.

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[Jonnydime]

I know it was, I know better than anyone on here that it had been.

I've got the videos of it.

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You broke a Midwest comp trans?

 

[Black AOD]

You broke a Midwest comp trans?

Converter, Input shaft and intermediate.

I don't have a logical explanation for why it happened though

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[00Rich]

i guess breaking/building four six fours i kind of know what i am talking about? (these are personal ones, I don't do it for a living)

you could build it with the best parts in the world, you still have no control over a hpfp taking a crap and wiping out your fuel system, or hanging an injector causing a melted piston, destroyed block and bent rod. Lifters are a crap shoot too, by the time you realize one has gone bad, you've eaten the cam and sent shavings thru the whole motor...and with any luck, sent needle bearings thru the lpop. The lack of top end lubricity in these motors causes excessive wear on rocker arms and bridges that will need to be tended to frequently.

I could go on and on but you get the point. When these things fail, its never a simple fix-kind of like how you cracked a piston you know? Turns into a motor build. Ya, thats the life of running a six four.

I dont dispute they are a ton of fun and have the potential to make big power. For a toy-sure. For reliability-nevah

on edit: J&K lol the email address is a gmail account, and their site says that 08-10 E-series vans use six fours haha no way in he!l i'd use them...

I wish there was a better pump to put in them then a k16

 

[Black AOD]

I wish there was a better pump to put in them then a k16

NO KIDDING. At least two companies make more reliable versions now at least.

OP, if I were you, sell said 6.4 and go buy 6.7

Or Light 6.4 on fire and collect insurance.... :fustrate:

That's what I wanted to do with my 6.4 most days in it's end days

 

[00Rich]

NO KIDDING. At least two companies make more reliable versions now at least.

OP, if I were you, sell said 6.4 and go buy 6.7

Or Light 6.4 on fire and collect insurance.... :fustrate:

That's what I wanted to do with my 6.4 most days in it's end days

Do you know if the new ones from Ford are any better?

 

[Black AOD]

Do you know if the new ones from Ford are any better?

The blocks ? I doubt it. I don't know for sure though.

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[00Rich]

The blocks ? I doubt it. I don't know for sure though.

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The K16 pump

 

[Black AOD]

The K16 pump

Yeah the pumps are definitely better. New PCV. New VCV. New internals. Full vacuum and plunger test. Much better than Ford OEM.

Buy Alliant Power or RAE/Flight Diesel

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[00Rich]

Yeah the pumps are definitely better. New PCV. New VCV. New internals. Full vacuum and plunger test. Much better than Ford OEM.

Buy Alliant Power or RAE/Flight Diesel

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Well ****! I was hope the Ford OEM was built better.

 

[239single6four]

Lol I wish i could collect insurance on it but what I owe On it and what they would give me and shorty credit on top
Of that I wouldn’t be in a good spot

 

[BravoZulu81]

Haven’t used them personally but Asheville Engine has a great reputation in my area. They do a TON of 6.0’s and a bunch of 6.4 as well. Depending on how you build it he has pretty good warranties as well.

I cross my fingers every day that nothing happens to my truck. I’d have to take out a loan to replace an engine.


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[Black AOD]

KDD just released aluminum 6.0L heads, 6.4L aluminum heads are coming before too long.

Harland Sharp now has the option to do custom rockers and solid lifters for 6.4's that fit in the stock rocker box and clear the injector lines. This is good news for high horsepower builds.

If the aluminum heads (whenever they release) and HS rockers prove to be reliable and help make the big power (and the heads don't crack), those are the last aftermarket parts that the 6.4 really needed that people had big problems with in high HP builds

I would never use reman blocks, they tend to crack.... If someone chooses to do so, make sure you put sleeves in.

 

[sideactiondiesel]

If the aluminum heads (whenever they release) and HS rockers prove to be reliable and help make the big power (and the heads don't crack), those are the last aftermarket parts that the 6.4 really needed that people had big problems with in high HP builds

I don't think we will see cracking... but we might see seats pushing into head surface.... That all depends on spring/rpm/HEAT... so time will tell.

I would never use reman blocks, they tend to crack.... If someone chooses to do so, make sure you put sleeves in.

It has been harder and harder to have any confidence in the blocks anymore. Not so much being cracked into cylinder but into lifter bore to coolant jacket, Magnaflux till your blue in the face your not going to see it. :cursing:

 

[Black AOD]

I don't think we will see cracking... but we might see seats pushing into head surface.... That all depends on spring/rpm/HEAT... so time will tell.



It has been harder and harder to have any confidence in the blocks anymore. Not so much being cracked into cylinder but into lifter bore to coolant jacket, Magnaflux till your blue in the face your not going to see it. :cursing:

Very Good points. Didn't think about that first one.

I'm with you on the blocks...they are so hit and miss

 

[Zeb]

When we consider the fact that the Duramax has used aluminum heads since its introduction in 2003, and that aluminum heads have been used for decades on high performance gas engines that see WAY more rpm and spring pressure than a diesel ever will, I don’t think that heat/spring pressure/rpm are an issue IF the casting is high quality.