Hardened valve seats.

weekendwarriorfsw32 · Sep 10, 2012

This my be a stupid question but I want to install hardened valve seats into my new heads. Is that something that the machinist will know where to get them or do you have to get them an bring them to him. If I have to get them where can I look?

blk350on20s · Sep 10, 2012

He should know/be able to get them

weekendwarriorfsw32 · Sep 10, 2012

Is it a time consuming thing to do?

Dzchey21 · Sep 10, 2012

Mine were a week turn around with machining for elite valve springs

blk350on20s · Sep 11, 2012

What dustin said. Mine were a week for machining and seats.

kyle43335 · Sep 11, 2012

if theres nothing wrong with your seats? i suggest that you leave well enough alone.

you could wind up making problems for yourself. spend all that money,drop a seat,and cost you some real money to fix it.

weekendwarriorfsw32 · Sep 11, 2012

Does that happen often? There brand new heads but my last set cracked into my valve seats and I wanted to stop that from happing again.

kyle43335 said:
if theres nothing wrong with your seats? i suggest that you leave well enough alone.

you could wind up making problems for yourself. spend all that money,drop a seat,and cost you some real money to fix it.

kyle43335 · Sep 11, 2012

weekendwarriorfsw32 said:
Does that happen often? There brand new heads but my last set cracked into my valve seats and I wanted to stop that from happing again.

you have a pm

MINK · Sep 11, 2012

No way was I gonna buy new heads that were likely just going to crack - Hardened seats for me aswell.

Dzchey21 · Sep 11, 2012

I've heard of dropping seats with high egts. Pretty rare I think but i'm sure it can happen

GreenF350 · Sep 11, 2012

No idea in the 6.4's, but I do know that it is a semi-common problem on the early common rail 5.9 Cummins. I think it was 03-05. I know 2003-2004 had problems dropping seats (they were speculating high egt's were the cause) and to correct it people were putting 2006 and later heads on them. Anyway...I know there was a way they were staking them in on the earlier heads too, so maybe that is an option? I guess I am kind of out of my area of knowledge.....I'll shut up now. Lol.
-Aaron

kyle43335 · Sep 11, 2012

thermal expansion is what causes them to fall out.

any time you can leave the stock seats in,you should.

more problems.

ill actually fix the real reason why they crack,and not have to about seats falling out,because some retard told me that it would stop the heads from cracking.

lmfao.

MINK · Sep 11, 2012

kyle43335 said:
thermal expansion is what causes them to fall out.

any time you can leave the stock seats in,you should.

more problems.

ill actually fix the real reason why they crack,and not have to about seats falling out,because some retard told me that it would stop the heads from cracking.

lmfao.

On edit:
I dont feel the need for a e-battle - Everyone needs to make the decision on there own about what they are comfortable with when it comes to valve seat issues.

kyle43335 · Sep 11, 2012

MINK said:
On edit:
I dont feel the need for a e-battle - Everyone needs to make the decision on there own about what they are comfortable with when it comes to valve seat issues.

no e battle here mink. i just happen to know the real reason why they crack. thats all. and the seats arent it...

04stroker · Sep 11, 2012

kyle43335 said:
no e battle here mink. i just happen to know the real reason why they crack. thats all. and the seats arent it...

Enlighten me please.

Dzchey21 · Sep 11, 2012

kyle43335 said:
no e battle here mink. i just happen to know the real reason why they crack. thats all. and the seats arent it...

Soo....

Rene G · Sep 11, 2012

Ok, what is the reason??

BFT · Sep 11, 2012

Better be a DAMN good reason to know that the crack at the valve seat has nothing to do with the crack at the valve seat.

kyle43335 · Sep 11, 2012

BFT said:
Better be a DAMN good reason to know that the crack at the valve seat has nothing to do with the crack at the valve seat.

The sharp edges around the valve pockets,gp bores,and nozzle bore.

Those sharp edges create a torch like hot spot where the heat comes to the edge and has no where to go.

Once the intense heat over a period of time works on these areas. The crack develops.

The crack travels into the seat area,and anywhere else. Another valve,gp bore,or nozzle bore.

The remedy is quite simple. It goes back to the days of the 318 dodge heads that had rhe same issue.

The remedy? Simply buff those sharp edges into a smooth radius. Thus not allowing heat to come to a point.

Get rid of the hot spots. Get rid of the cracks.

BFT · Sep 12, 2012

kyle43335 said:
The sharp edges around the valve pockets,gp bores,and nozzle bore.

Those sharp edges create a torch like hot spot where the heat comes to the edge and has no where to go.

Once the intense heat over a period of time works on these areas. The crack develops.

The crack travels into the seat area,and anywhere else. Another valve,gp bore,or nozzle bore.

The remedy is quite simple. It goes back to the days of the 318 dodge heads that had rhe same issue.

The remedy? Simply buff those sharp edges into a smooth radius. Thus not allowing heat to come to a point.

Get rid of the hot spots. Get rid of the cracks.