Sooo. heres the question.

My friend has a 6.4, and he was running the 250 spartan tune for a long time without issues.

He tried the 310 and it started puking, so he re loaded the 250, and now it pukes on the 250 as well. Something obviously stretched.


Setting it back to stock, it wont puke no matter how hard you run it.


Should a truck that does this, just need studs? or is maybe the head gaskets getting weak?


I am thinking just studs to lock it down good and tight, what ya'll think?

 

Since we don't have alot of the 6.4's that have done this it is hard to say the best route to go.

I think I would do the studs and gaskets to error on the side of caution.

Especially since he is pretty there just to do the studs he might as well do the extra steps for the gaskets.

Just my thoughts.

 

Just for learning purposes. What do you mean by puking and where?? Is it coolant out of degas bottle??

 

Exhaust gases getting into the cooling system will eventually be expelled from the weakest point which is the degas cap. A faulty head gasket seal or a leaking EGR cooler will allow these gases to enter the coolant. Sounds like the OP's friend lifted the head with his tune. (you pay to play)

 

yeah the degas bottle.

He said never even got the chance to push the 310 at all, so hes sure it has something to do with timing etc, cause he never rad the truck hard like he did with the 250, because he was waiting for exhaust and air intake.

And yet it's funny it wont puke when programmed to stock.

 

What about just putting a new degas bottle cap on it.

I just replaced mine as I had a little puking driving easy. Lost about 1/2 pint.

 

its already been to the dealership, pressure tested and checked.

Everything passes when set to stock.

Thats why i'm wondering if head gasket replacement is even necessary.

 

Check out Spartans web site. Spartan will tell you that there tuner will cause damage running higher tunes.

 

Stock your only seeing 37-38 psi boost, on the 250 tune your around 43-47 and the 310 you could see 50psi, this could explain why the issue is not showing. When the head gaskets gave out on mine the coolant wouldn't push out the degas bottle tell i made around 39-40 psi......there was no issue 37psi or less. The only way to load the engine enough is to get up around 70 mph to get the trans converter to lock up, then you can put a load on it. The other way is simply test the coolant for exhaust gas, ford does not recognize that method but it would shed some light on the underline issue.

 

Subscribing, inquiring minds want to know.

 

Yeah but he insists he never even tried pushing the truck at all with the 310 loaded, cause he was scared of inhaling the air filter.


All i can guess is that the timing is advanced so crazy on the 310 that the peak combustion pressures are super high.

 

hello cab off.

 

How bad of a job is installing studs?

I don't know but i was told it is easier than a 6.0, but i've never done it or ever witnessed it for that matter.

 

2008-9 6.4 Headstud Install w/ Cab-ON - PowerStrokeNation : Ford Powerstroke Diesel Forum

Above thread is how someone does it with cab on, and heads remain on, (not replacing head gaskets).

Just sharing, I have no personal experience with this method.

Bob

 

on a truck that is already from the degas I would not just slap a set of studs and go. I suggest removing heads and check to make sure they are still flat, replace the gaskets and then stud it. but thats just me.
how bad a job is, is a relitive statement. I dont mind working on the 6.4 I find them easy for the most part but then again I do them evry day.