Hardened valve seats.

[BFT]

And for future comments... No smart a$$ remarks. Unfit is as easy as that and fixes our problems then I'm game.

 

[weekendwarriorfsw32]

After talking to Kyle about it I will be doing it.

 

[kyle43335]

And for future comments... No smart a$$ remarks. Unfit is as easy as that and fixes our problems then I'm game.

Yes i have. Im also torture testing a set on my blue truck. Would you agree that 2200 degrees of exhaust temps are hot enough to test it?

The truck/ motor was built to specificly test it. Im pulling the heads off that motor in a few weeks. Thats 2200 degrees about 20 ish truck pulls in 2 months time. every pull was at that temp. Countless hot street runs az well.

Also plz explain your above qoute. I dont understand what you meant by it?

 

[BFT]

Yes i have. Im also torture testing a set on my blue truck. Would you agree that 2200 degrees of exhaust temps are hot enough to test it?

The truck/ motor was built to specificly test it. Im pulling the heads off that motor in a few weeks. Thats 2200 degrees about 20 ish truck pulls in 2 months time. every pull was at that temp. Countless hot street runs az well.

Also plz explain your above qoute. I dont understand what you meant by it?

That was meant for anyone who had negative comments.

 

[Dzchey21]

Not too start an argument but on my black truck most of the cracks started in the exhaust seats and were working thur way to some of these sharper edges you speak of. Not all but most.


I agree with Robert on this Kyle, usually you bring good info to the table but sometimes the way you come off says ass hole... Just being honest. And with some of your comments about how you know something others done looked pretty childish imho.... And I know i'm not the only one that saw it.


Just keep it on topic and thanks for sharing my next set of heads will have all the edges buffed off... Can't hurt that's for sure

 

[kyle43335]

Not too start an argument but on my black truck most of the cracks started in the exhaust seats and were working thur way to some of these sharper edges you speak of. Not all but most.


I agree with Robert on this Kyle, usually you bring good info to the table but sometimes the way you come off says ass hole... Just being honest. And with some of your comments about how you know something others done looked pretty childish imho.... And I know i'm not the only one that saw it.


Just keep it on topic and thanks for sharing my next set of heads will have all the edges buffed off... Can't hurt that's for sure

its not that i try to come off like a azzhole. i dont like hearing people tell stories about how doing x,will solve a problem,when anyone with half a brain in their head can see its bullchit. especially when doing x,causes other issue itself.

did you,or can you clearly see on the heads from your black truck,where the cracks start in the seat area,but havent made it to the sharp edge in the valve pocket??

every single head ive ever had off a 6.0,6.4 since 2004 that were cracked,were always through that area down into the seat. i have never seen a seat crack,where it originated from down in the seat area and didnt make it to that edge yet. it always came from that sharp edge first,then extending down to the seat,and the other end goes where ever else it goes(to another valve,gp hole,nozzle hole)

if it generally known i bring good info to the table,why then would i just pick anytime to straight up be a azzhole?

especially when i can keep the info from my day,that i discover,or prove,figure out,whatever,and keep it to myself(not share it)

if thats what i did,and not share any of this info(whether you agree or disagree with it) i could see your point.

 

[Dzchey21]

I'll be honest that I was in a hurry that when I found my cracks I just sent them to the machine shop. I do remember seeing a really tiny crack in the seat only. But that doesn't mean I didn't miss the edge or something. When I get around to building my spare motor I'll do this and see how it lasts

 

[weekendwarriorfsw32]

I am in the process of doing this right now and let me tell you it is labor intensive.

 

[kyle43335]

I am in the process of doing this right now and let me tell you it is labor intensive.

right!!!

 

[Dzchey21]

Most good things are lol post some pics if you don't mind

 

[kyle43335]

I have 4 sets of heads to do right now. *** me.

 

[weekendwarriorfsw32]

Will do, I will post them in the A.M

Most good things are lol post some pics if you don't mind

I have 4 sets of heads to do right now. *** me.

Your life sucks!! I am bitching about just 1 set, but I am also smoothing out the intake and exhaust a little to while I am in there.

 

[B585Ford]

Yes i have. Im also torture testing a set on my blue truck. Would you agree that 2200 degrees of exhaust temps are hot enough to test it?

The truck/ motor was built to specificly test it. Im pulling the heads off that motor in a few weeks. Thats 2200 degrees about 20 ish truck pulls in 2 months time. every pull was at that temp. Countless hot street runs az well.

Also plz explain your above qoute. I dont understand what you meant by it?

Since you pride yourself in understanding what causes cracked heads/seats, what is your opinion on driving conditions that speed up cracking the most.... many miles (self explanatory), brief excessive EGTs (such as the 1/4 mile), sustained high EGTs (consistently running from 800 to 1200), very hot sustained EGTs followed by sudden drop in EGTs (such as towing up a long grade and then descending down the grade)?

 

[kyle43335]

Since you pride yourself in understanding what causes cracked heads/seats, what is your opinion on driving conditions that speed up cracking the most.... many miles (self explanatory), brief excessive EGTs (such as the 1/4 mile), sustained high EGTs (consistently running from 800 to 1200), very hot sustained EGTs followed by sudden drop in EGTs (such as towing up a long grade and then descending down the grade)?

All the engines ive pulled apart that had cracked heads were 6.0 and 6.4 with big tunes , injectors,etc.

The owners beat the **** out of them on a daily basis.

Heat is whats cracking the heads. Lots of it. Period. The driving habits leading to this?

Much time with the gogo pedal on the carpet, creating that heat.

 

[B585Ford]

All the engines ive pulled apart that had cracked heads were 6.0 and 6.4 with big tunes , injectors,etc.

The owners beat the **** out of them on a daily basis.

Heat is whats cracking the heads. Lots of it. Period. The driving habits leading to this?

Much time with the gogo pedal on the carpet, creating that heat.

Thanks. Related to this build (the OP uses his truck for heavy towing), one thing that has always had me concerned was when I am towing and climbing a long hill, the heads have to get pretty hot. If I immediately start descending when I get to the top of the hill, my EGTS drop quickly. Obviously the change in temps don't happen as quick as if you could throw cold water on them, but I was curious if the drop is sudden enough to promote cracking.

 

[kyle43335]

Thanks. Related to this build (the OP uses his truck for heavy towing), one thing that has always had me concerned was when I am towing and climbing a long hill, the heads have to get pretty hot. If I immediately start descending when I get to the top of the hill, my EGTS drop quickly. Obviously the change in temps don't happen as quick as if you could throw cold water on them, but I was curious if the drop is sudden enough to promote cracking.

No because your not shocking the heads like you would throwing water on them.

It a controlled cooling effect if ya can understand what im geting at??

 

[B585Ford]

Yep, I understand. Thanks for the info.