Engine/Transmission (1998.5 - 2002) Specs for O-ringing head?

[ls1yj]

Does anyone have the specs for oringing a head?



Wire dia, ring dia, wire protrution,... ... etc.

 

[SpicyJam]

Well you can send me your head and I can get it done for ya. About as speck as I would like to be.

 

[Jetpilot]

We use a . 040 groove and a . 041 SS wire leaving . 010-. 012 protrusion. Be sure and deck the head prior to the o-ring groove being cut. There are several tools out there to accomplish the job, BHJ seems to be the most popular. The machine shop we use does it on their lathe and can get the depth to within . 0001.



Doug Smith

 

[Bob Wagner]

great pictures here

https://www.turbodieselregister.com/forums/showthread.php?t=161626

 

[SpicyJam]

https://www.turbodieselregister.com/forums/showthread.php?t=161626

Bob those are fire ring grooves, I cut them too.

 

[Bob Wagner]

I know what they are and the pictures are good reference.

 

[SpicyJam]

I know what they are and the pictures are good reference.

I was not meaning that you didn't know what they were, I only wanted to address that they were not O-rings. I am sure you know what they are... . but some don't... ..... that's all.

 

[Bob Wagner]

easy tiger :-laf j/k

 

[ls1yj]

We use a . 040 groove and a . 041 SS wire leaving . 010-. 012 protrusion. Be sure and deck the head prior to the o-ring groove being cut. There are several tools out there to accomplish the job, BHJ seems to be the most popular. The machine shop we use does it on their lathe and can get the depth to within . 0001.



Doug Smith

Is the wire a soft wire that deforms when you torque the head down or is it a harder wire that stays protruded the . 010-. 012 into the head gasket? Does the groove have square corners or is it the same shape as the wire? And is it obvious when looking at the head gasket where the wire should make contact?



Thanks for the info Doug.

 

[ls1yj]

https://www.turbodieselregister.com/forums/showthread.php?t=161626

Thats what got me thing about this. He's got a nice setup there, his mill makes mine look small.

 

[Jetpilot]

There are different schools of thought on the wire hardness... . Some like it soft to make up for any irregularities while others like to use a very hard wire that makes a good bite. We use a medium/hard wire when we do them. Whatever you do don't use copper wire as it is way too soft. The groove is normally a sqaure type cut. Be very careful and make the grooves as perfect as you can plus mate the ends of the wire up perfectly. The wire should hit right in the middle of the fire ring of the gasket.

 

[Jim Fulmer]

Mine is a little different as it was one of the first ones Piers Harry put out to the general market. It has . 018 protrusion with a . 051 wire... ... harder to seal but I do have 14mm's... ... takes 3 times for it to bite all the way in and when it does it looks like you did it with a hammer and chisel.



Jim

 

[BILLVO]

I have questions also. what is the difference between o-ringing and fire ringing. It seems that they both use wire what is the difference or am I confused here? What advantage is it to do head and block versus just the head the pics show both being done and most people only do the head am I correct here? Is there a way to do the block in frame whithout a total tear down, I hear of people who have done the block while doing a head gasket? I have 80k on stock gasket yet and have been starting to compete hard with it localy and am watching and expecting it to happen any time and was wondering what is the best option for an inframe job?

 

[SpicyJam]

I have questions also. what is the difference between o-ringing and fire ringing. It seems that they both use wire what is the difference or am I confused here? What advantage is it to do head and block versus just the head the pics show both being done and most people only do the head am I correct here? Is there a way to do the block in frame whithout a total tear down, I hear of people who have done the block while doing a head gasket? I have 80k on stock gasket yet and have been starting to compete hard with it localy and am watching and expecting it to happen any time and was wondering what is the best option for an inframe job?

Yes there is a difference, an o-ring job is cut into the head and a wire is placed in the groove to hold the factory fire ring on the gasket. The fire ring job is where you have the factory fire ring cut out of the gasket and you replace it with a solid core ring, that has no end gap. You can cut fire rings into just the head, but it is not they way most of us that cut them want to see them done. I can cut the rings in the block while it is still in the truck, latley I have been traveling around to different customers homes and doing just that, lets see, MN, WI, SD, ND, and Iowa so far.

 

[SLangegger]

Mr. Jetpilot,



Just out of curiosity, how do they cut the grooves using a lathe? I understand how its done on a mill, just not how they would do it on a lathe.



thanks

Steve

 

[Jetpilot]

Mr. Jetpilot,



Just out of curiosity, how do they cut the grooves using a lathe? I understand how its done on a mill, just not how they would do it on a lathe.

I hate it when I do that..... You are correct I should have said mill, way too long of a week for me.



Doug

 

[ThrottleJockey]

So I can get a groove for fire rings cut into my head AND block?