Cracked piston

[6.4 Stroker]

Take the nozzle off the injector from the failed hole. Just about bet you the nozzle is clogged.

 

[kleake]

Yep, it was a new injector 1 year ago. I'm waiting on a callback from Ford to see what they need before I do anything with it. Ultimately that one, and hopefully all from the batch will be replaced.

 

[PrecisionEngine]

I hope you do in fact find something in the injectors. However, attached is what my piston looked like. Mine showed a melted whole as well as a crack across the piston.

I as well, suspecting a bad injector, sent all 8 to RCD. they tested and flowed them to find nothing wrong.

Sorry about the large rotated images, not sure how to fix them.

Sent from my SAMSUNG-SM-G935A using Tapatalk

 

[kleake]

I hope you do in fact find something in the injectors. However, attached is what my piston looked like. Mine showed a melted whole as well as a crack across the piston.

I as well, suspecting a bad injector, sent all 8 to RCD. they tested and flowed them to find nothing wrong.

Sorry about the large rotated images, not sure how to fix them.

Sent from my SAMSUNG-SM-G935A using Tapatalk

Wow, that does bite when you can't find the source of the problem. The burn pattern on mine looks pretty good, so i'm still considering fatigue after 250k miles but it's looking like injector to all that have seen it.

 

[mohead1]

Where yall running a hopped up tune that caused these piston issues or stock trucks

Sent from my SM-G900V using Tapatalk

 

[sootie]

Where yall running a hopped up tune that caused these piston issues or stock trucks

Sent from my SM-G900V using Tapatalk

Not sure what a "hopped up" tune is but i would venture to say most on this site run tuned trucks. Its common for this to happen on bone stock trucks so no bearing on whether tuned or not.

 

[mohead1]

And the cause being emissions over fueling, excessive heat from egr, or what. Hopped up to me is 150+ above stock, i run a tow tune most of the time but have put the 100 hp tume on it occasionally....runs well but i worry about it...dont do street "racing" around

Sent from my SM-G900V using Tapatalk

 

[PrecisionEngine]

Where yall running a hopped up tune that caused these piston issues or stock trucks

Sent from my SM-G900V using Tapatalk

As sootie said, I think this happens stock or tuned. My truck went at on a diet at 9k and smoked a piston at 128k. Never skipped a beat until that day. And I never took it off a performance setting or ran it hotter than 1300deg.

Sent from my SAMSUNG-SM-G935A using Tapatalk

 

[sootie]

And the cause being emissions over fueling, excessive heat from egr, or what. Hopped up to me is 150+ above stock, i run a tow tune most of the time but have put the 100 hp tume on it occasionally....runs well but i worry about it...dont do street "racing" around

Sent from my SM-G900V using Tapatalk

More the cause being thermal shock due to inadequate air flow to those cylinders because of the design of the intake manifold.

 

[kleake]

Yep, as has been said, this happens to stock or tuned. In my case, it has been tuned most of it's life, I picked it up at 175k. Towed heavy fairly often, had head gaskets start to leak under heavy throttle around 210k. Babied it to 225k, rebuilt the top end and that's when my bigger problems started. (New from Ford: Heads, injectors, rockers, lifters, HPFP, front cover, etc.) Turns out there was a change in rockers that I (and Ford) wasn't aware of and caused valves to hit the pistons lightly. Also the head gaskets didn't hold, so I pulled it apart again around 235k. Ford warrantied out the heads and rockers. Put it all back together and it's been perfect until this, which appears to be a faulty injector from Ford. Funny how the OEM injectors lasted 225k, but the new ones lasted 25k.

All of my EGR and emissions stuff is and has been gone for quite some time, and that is why I think I was able to make it this long without a major issue. I've heard of several with less than 100k with more problems than I have had. Tuning can stress things like head gaskets if you haven't studded it, but other than that as long as tuning isn't extreme or it's driven crazy hard, it should be fine.

 

[mohead1]

Im at 136k, like i previously mentioned, SCT w tow tune and street tune occasionally. All the bulls h i t has been taken off to save "weight"....yeah, thats it. Highly maintained on all fluids, new rockers, new front cover w oil pump, water pump, belts, few hoses, built trans/converter...hope it holds. I have thought about pulling turbos and injectors around 180k or so for new cartridges in hi and lo turbos, injectors to RCD for rebuild, upgrade intercooler. I pull a 15k 5th wheel around, keep egts below 1000 as much as possible. 4.88 gears so it aint straining too bad...ha

Sent from my SM-G900V using Tapatalk

 

[kleake]

Well, the machine shop is saying he would have to take it past .030 to clean it up, which seems really odd to me. All of the scuffing was added material from the piston, and there was only a very small nick/scratch that should have cleaned up at .010. He is telling me he may have to sleeve it, but he doesn't like that idea either. I'm planning to go by on Monday and take a look for myself, but i've seen much worse clean up easily. Anyone have experience with sleeves in these just in case? I would almost rather deal with a very tiny scratch (after taking it to .030) than I would a sleeve.

 

[PrecisionEngine]

Same thing happened to mine. The score looked minimal, but when you dropped a depth gauge on it, it showed ~0.020". And 0.020" on the side would be .040" in diameter. Thus I ended up with a new, non-reman, block from Ford.

I talked with Morgan about sleeving my old block, but we both agreed that it would've been within a couple hundred dollars of a new block by the time you add up surfacing, boring, and sleeving.

Though Morgan did not have anything negative to say, at the time, about sleeving.

 

[kleake]

Ahhh yes good point. My thinking of .010 is .020 total. If you don't mind me asking, what was the approximate cost of the new block from Ford?

 

[PrecisionEngine]

Ahhh yes good point. My thinking of .010 is .020 total. If you don't mind me asking, what was the approximate cost of the new block from Ford?

I don't have the bill nearby. going off memory, $2300 roughly. I'll try to dig up the bill If you need it.

 

[kleake]

Ouch..... Was that exchange? No need for the bill, that gives me a ball park. It just keeps sucking up funds every time I turn around. Why the heck do these have to cost so dang much for every little (or big) piece.

 

[Roccafellas]

Where yall running a hopped up tune that caused these piston issues or stock trucks

Sent from my SM-G900V using Tapatalk

Mine was stock

Sent from my iPhone using Tapatalk

 

[PrecisionEngine]

Ouch..... Was that exchange? No need for the bill, that gives me a ball park. It just keeps sucking up funds every time I turn around. Why the heck do these have to cost so dang much for every little (or big) piece.

No, I still have my old block. I feel you on the cost. I just found the bill for the heads and valvetrain: $4,600.00. but I spared no expense: pressed seats, pressed guides, coating, springs, pushrods, etc.

If it don't last this time around, I'm ordering a case of whisky and we're going to have a bondfire with the SOB.

 

[kleake]

Ahh, well maybe I can get about $50 back in scrap metal with it at least. I put about $9k in the top end the first time around, this will put me right near the cost of a complete engine from Ford. If I didn't like the truck so much otherwise, I would have already had a bonfire! lol

 

[sootie]

#sixfourlyfe