Cab off repair and lift installed on my 6.4

sootie · Apr 15, 2020

Lol at not having to do it again hahahahah

FourEyed · Apr 15, 2020

Damn that's a low blow.. haha

needen$77 · Apr 17, 2020

I got this 97 7.3 i put diesel in.. how long before i should worry. Jk i like seeing these, i never dealt with these monsters

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FourEyed · Apr 25, 2020

Well I put 150 miles on it, ran excellent.

Today when driving out of nowhere it started shaking under load and white smoke.
It's definitely down a cylinder.. No idea where to start but looks like it needs to come apart again...

W.T.F

webb06 · Apr 25, 2020

FourEyed said:
Well I put 150 miles on it, ran excellent.

Today when driving out of nowhere it started shaking under load and white smoke.
It's definitely down a cylinder.. No idea where to start but looks like it needs to come apart again...

W.T.F

Sounds like an injector

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FourEyed · Apr 30, 2020

so...

Dug into it. Looks like an intake valve on #7 broke off right at the keeper. Luckily the valve didn't drop into the motor. From what we can tell there is nothing jumping out at us that would cause this. The heads were done, and all new valves installed. It's like a clean break. Possibly a faulty valve?

Has anyone seen a failure like this before?

No marks on the piston for anyone saying p/v clearance.

sootie · Apr 30, 2020

I had the exact same thing happen to me, about the same amount of time after a rebuild. Except in my case, the valve dropped and took my motor out.

There was piston contact in my case though.

White_monster · May 1, 2020

sootie said:
I had the exact same thing happen to me, about the same amount of time after a rebuild. Except in my case, the valve dropped and took my motor out.

There was piston contact in my case though.

There are many things that can cause this. I doubt faulty valve is the issue. Post pics of the piston. Did you install stiffer valve springs? Reuse the retainers?

FourEyed · May 1, 2020

Not sure if that was directed to me or sootie, but I have stiffer springs, and upgraded pushrods. it tossed the rocker off the pedestal too in my case.

Not sure on the retainers, I will ask the machine shop. They assembled the shortblock and I was told they put all new valves in the heads.

I'm baffled as to what caused this, out of patience with the truck, and it's financially killed me. Is there anything at all I should check or replace to prevent this??

No one i've talked to has seen anything like this.

White_monster · May 1, 2020

FourEyed said:
Not sure if that was directed to me or sootie, but I have stiffer springs, and upgraded pushrods. it tossed the rocker off the pedestal too in my case.

Not sure on the retainers, I will ask the machine shop. They assembled the shortblock and I was told they put all new valves in the heads.

I'm baffled as to what caused this, out of patience with the truck, and it's financially killed me. Is there anything at all I should check or replace to prevent this??

No one i've talked to has seen anything like this.

I've seen this many times. Usually a result of piston to valve contact. Also seen it from the retainers not being seated quite right. If a rocker breaks it will bend and break the valve stem sometimes. Pm me and we can discuss further.

FourEyed · May 1, 2020

Since it's at an actual shop now I will be pulling the cab tomorrow.. Once the heads are off I will thoroughly inspect all the pistons. Hopefully no marks on any of them, but we will see.