[SnowDrift]

I'm trying to learn about the subject title. I've only heard about it and ready very little. It looks like vendors sell the tool for the job, but I didn't understand until recently what it even was. Is there a downside to this process?

Is there a concern from dissimilar metals in contact with one another, with the copper touching the metal of the block & head? How is galvanic corrosion mitigated with this type of setup? Some use stainless steel for these rings, as I've seen.

Since this is a consideration, is it safe to say that a gasket isn't already made with this type of feature integrated for our particular engines?

 

[OkDually]

I'm trying to learn about the subject title. I've only heard about it and ready very little. It looks like vendors sell the tool for the job, but I didn't understand until recently what it even was. Is there a downside to this process?

Is there a concern from dissimilar metals in contact with one another, with the copper touching the metal of the block & head? How is galvanic corrosion mitigated with this type of setup? Some use stainless steel for these rings, as I've seen.

Since this is a consideration, is it safe to say that a gasket isn't already made with this type of feature integrated for our particular engines?

The Turbonator brothers discussed this mod in the 6.5 performance section some years back: 6.5/6.2 High Performance Engine Modifications

Look the member name up and go through their discussions and you should find it

 

[DieselPro]

I'd only do this on the most extreme application... The gaskets used have the correct amount of sealing necessary. O'ringing requires very careful machining and installation. This is not something the average builder should try. The 6.5l does not tolerate high boost very well and if that is your goal we will be seeing some of your carnage at a later date. Try to keep it under 14 psi and stock gaskets and engine life will be optimum.

 

[SnowDrift]

Thank you, OkDually. I found this thread when I was searching - not a whole lot of discussion on the topic. It's mentioned from time to time, but not a big buffet of dialog.
(2) 18:1 pistons and block orings | Diesel Place

The engine isn't getting built by an average builder. I've been asked if I want the o-rings by the builder and am looking for a reason to not do it. So far, it is looking like it's not something to be concerned about. The pistons will leave me with 18:1 compression and I've already gotten suggestions on the proper turbo for it. I'll maintain the boost at what the builder recommends and not 1/10th psi more. It's getting head studs and a pretty reasonable bottom end treatment to try to hold things together.

I didn't see any discussion on the dissimilar metals, so maybe that isn't a concern. ?

 

[OkDually]

Thank you, OkDually. I found this thread when I was searching - not a whole lot of discussion on the topic. It's mentioned from time to time, but not a big buffet of dialog.
(2) 18:1 pistons and block orings | Diesel Place

The engine isn't getting built by an average builder. I've been asked if I want the o-rings by the builder and am looking for a reason to not do it. So far, it is looking like it's not something to be concerned about. The pistons will leave me with 18:1 compression and I've already gotten suggestions on the proper turbo for it. I'll maintain the boost at what the builder recommends and not 1/10th psi more. It's getting head studs and a pretty reasonable bottom end treatment to try to hold things together.

I didn't see any discussion on the dissimilar metals, so maybe that isn't a concern. ?

This is the mod the brothers were discussing back in 2011

6.2 BUILD - Project Replacement Motor...(Lifes Funny Twists)

well, last monday we started pulling the motor out of our 1988 grumman to swap into our 3500 "rattlepuss" truck to retire the cracked pistons motor.... when we bought the grumman, we were informed that canada post had replaced the motor with a rebuilt one, low miles on it when we got it, and we...

www.dieselplace.com

 

[Twisted Steel Performance]

I'm the builder, @SnowDrift if you want to start a build thread I will post pics and info in it.

 

[SnowDrift]

I'll add to it later on, but I got started.
(2) '95 K2500HD engine project | Diesel Place

 

[Twisted Steel Performance]

This is the mod the brothers were discussing back in 2011

6.2 BUILD - Project Replacement Motor...(Lifes Funny Twists)

well, last monday we started pulling the motor out of our 1988 grumman to swap into our 3500 "rattlepuss" truck to retire the cracked pistons motor.... when we bought the grumman, we were informed that canada post had replaced the motor with a rebuilt one, low miles on it when we got it, and we...

www.dieselplace.com

We are talking about 2 different mods , this one is fire ringing or o ringing around the cylinder.

 

[SnowDrift]

I think post #3 shows the rings around the cylinder and then if I remember right from when I read through the multi-page thread, it was shown a little better later on also. There wasn't much back-and-forth about it, though.

 

[SnowDrift]

Post #100 picks it back up, then #101 starts talking about short fill. Not too far before that, on post #92, they're coating the inside of the engine. Somewhere they made mention of two block heaters due to short filling the block.

 

[SnowDrift]

Post #107 shows the short fill process and is where the two block heaters are mentioned.

 

[joeq]

Interesting thread. Can't remember how the coolant passage ways are addressed, if the stock gaskets aren't used.

 

[SnowDrift]

Stock gaskets are still used, I believe.

 

[joeq]

Don't think so. Not W/O removing the seal. where the O-ring seats. And that wouldn't work either.

 

[paleyjim]

I ringed my deck after a gasket let go. Wouldn’t build a 6.5 without the o-rings in the deck. But I’m also well beyond factory fueling and boost.
I’m using fel-pro gaskets. They do not get modified to use with the o-rings.

 

[joeq]

How does that work? Aren't the gasket sealing surfaces thicker than the O-ring? Does the C-ring seal against the gasket around the cylinder? Don't understand how both could work together.

 

[Twisted Steel Performance]

I use victor gaskets as they have the widest fire ring, the o-ring grove is cut in the block where the wire will be in the middle of the gasket fire ring. The ring protrusion is .010" above the deck and adds more sealing pressure in the fire ring around the cylinder.

 

[SnowDrift]

I ringed my deck after a gasket let go. Wouldn’t build a 6.5 without rings.

Please explain.

 

[paleyjim]

Please explain.

I updated my post to make it more clear I was talking about the orings in the deck.
As Chris indicated in the post before yours, the deck gets a groove cut around each bore. A wire gets pressed into this groove, but sticks out of it just a little so that when the gasket and head are torqued down, the wire "bites" into the fire ring of the gasket and holds it tightly in place. This is an old practice that is commonly used in applications that tend to have trouble with head gaskets blowing or in extreme high performance (again where head gaskets tend not to live). I think the diesel corvette thread might have had some photos of the installation. I'll see if I can find them...

 

[paleyjim]

Procycle Thread
Post 85 shows cutting the groove. I'm pretty sure there are more photos here somewhere. Perhaps that thread OK linked earlier.