Valve Seat Damage

[AH64ID]

Oh, really?? Please see below.

I never said this motor had that happen, in fact said it didn't happen that way twice. You apparently didn't read the full post. I simply pointed out that you can have FOD live on a piston for a long time and never know it, not speculation but fact. Which is why I would have an easier time seeing a piece of FOD sitting on a piston than go thru a valve and leave no sign or get stuck in said valve.

I'm through discussing this subject. Carry on with your speculation.....

Rusty

spec·u·la·tion [spek-yuh-ley-shuhn] noun
1. the contemplation or consideration of some subject:

Hmm. . that doesn't list "Having seen it with your own eyes". Really it happens, whether you want to believe it or not.

Amazing how closed minded some of you guys on this board are...

 

[cerberusiam]

because there was two chunks still bouncing above intake #6, about a 1/4" size peice, and on same sized peice lodged in the piston.

Pretty much answers the question where the pieces have been for a while. Not unusual on a reman if somebody did not check the head carefully afer either machining out a bad seat or one that disintegrate in a running motor and spit them back into the intake.



Stuff will hang around in the intake for along time and go right thu the valve with no discernable damage.

 

[rscurtis]

I think you have the answer. A piece of a valve seat from previous damage and a repair was hiding somewhere in the intake tract.



I don't subscribe to the idea that a piece of valve seat would survive for more than a second or two in a cylinder without doing some type of damage. I've seen plenty of carnage on small two-stroke engines, and have never seen errant parts make it through the engine without damage- and they have more minimum cylinder volume than a diesel engine. The damage occurs so fast that the harm is done before the sound can reach your ear.

 

[AH64ID]

Pretty much answers the question where the pieces have been for a while. Not unusual on a reman if somebody did not check the head carefully afer either machining out a bad seat or one that disintegrate in a running motor and spit them back into the intake.



Stuff will hang around in the intake for along time and go right thu the valve with no discernable damage.

Exactly, still amazes me that it can make it thru a valve opening and closing.



Anyone know the ratio for the cam lift to valve opening? The stock 05 cam only has . 237" of lift.

 

[buzzinghalfdozen24]

Thank you for that spec. I wondered what valve lift dimension was. I still find it odd as well. The fact that I have three almost identical seat chunks shows me that when the cylinder was recon-ed the process to remove valve seats my be to break them out rather than press out. The two prices that are not in the head actually mate together and have a much different seat surface than all other 24 seats residing in the cylinder head. I have owned the truck nearly two years and 25k miles. Cylinder bores look very clean and had incredible hone marks still. Rod bearings in descent shape. So if this misfortune hadn't happened I should have gotten many many more miles before a rebuild. Now im rolling in main bearings and rod bearings on all six. Might as well have a fresh engine since ive got it all torn down. im most likely going to headstud while I put the head back on, might as well, never have to worry again. I will probably add stage one injector tips as well again, since ive got it apart it the easiest time to upgrade.

 

[Nyoest]

Thank you for that spec. I wondered what valve lift dimension was. I still find it odd as well. The fact that I have three almost identical seat chunks shows me that when the cylinder was recon-ed the process to remove valve seats my be to break them out rather than press out. The two prices that are not in the head actually mate together and have a much different seat surface than all other 24 seats residing in the cylinder head. I have owned the truck nearly two years and 25k miles. Cylinder bores look very clean and had incredible hone marks still. Rod bearings in descent shape. So if this misfortune hadn't happened I should have gotten many many more miles before a rebuild. Now im rolling in main bearings and rod bearings on all six. Might as well have a fresh engine since ive got it all torn down. im most likely going to headstud while I put the head back on, might as well, never have to worry again. I will probably add stage one injector tips as well again, since ive got it apart it the easiest time to upgrade.

*little devil on the left shoulder says do a cam upgrade too and be completely done*



Sounds like you have all your bases covered. It's unfortunate this occurred but atleast now you know what you have.



*angel of the right shoulder says this guys full of it*

 

[blacksheepdiesel]

I would absolutely be doing an aftermarket cam if I was in your shoes.

Godspeed,
Trent

 

[JHumphries]

Have you checked the turbo yet?
If there were pieces on both sides of the intake valve, it's 'possible' that it could pass through the exhaust valve as well.

You might want to pull the housings off of the turbo to get a good look the the exhaust turbine.

 

[MChrist]

Yep, then may as well upgrade the turbo, since you will have head studs installed and a new cam with bigger injectors... wait, I can see the sign up ahead... It says:"Slippery Slope". :-laf

 

[AH64ID]

I vote cam as well, the 3rd gen cam was ground for emissions not for performance.

 

[TBartlett1]

Perhaps thats all thats left from a 6. 0 Power Stroke breakfast!!

 

[HBarlow]

Perhaps thats all thats left from a 6. 0 Power Stroke breakfast!!

That's a good one. The OP's Dodge might have simply gobbled up the Furd coming up from behind as the Furd struggled up a long grade.

 

[Wingate]

Maybe it came out of one of our new 6. 7L Fords from work??



Wait... due to the multiple exhaust filters. . the Ford 6. 7L parts/pieces can't get out thru the exhaust. .

 

[HBarlow]

How about those Furds?

How are they performing now and at how many miles?

What's your overall opinion?

 

[buzzinghalfdozen24]

Decided to update my status on engine build, years later. It was truly a remanufactured head. All of my valve seats were perfect. My machine shop had to take out a small dimple from the damage in the head. But all of my valve seats were perfect. #6 piston was bad, but no damage to the cylinder walls. Honed out. And did a full rebearing, reseal on the engine. ARP headstuds kept everything together, and did 60hp injector nozzles. Now, after 30,000 miles rebuild was flawless!!!!