ProVK

What is the best way to set up the Stainless Steel Orings when running a 40 thou thick copper head gasket, iron block and alloy heads.

- Single Oring in Block and no reciever groove in Head.
- Single Oring in Block and reciever groove in Head.

What other options are there ? Double O Rings ?

Thanks

SATAN

iTrader: (2)

The BEST way would be to do double O-rings coupled with double receiver grooves. But that can get pricey for all that machine work.

I personally run O-ringed iron block with no receiver grooves in alloy head making 100whp per cylinder with no blow outs. I also have 5 studs per cylinder also though, as apposed to the typical 4 on the LSX engines.

I have been told that once you compress a copper gasket onto an O-ringed block/head, you cannot use that gasket again. I have also heard of people doing it with no ill results though, so... whatever.

Fireball

iTrader: (21)

we run double orings

Phil99vette

iTrader: (11)

Find a machine shop that is qualified to do the procedure and they will have the best way to complete the task. double o-ring is the strongest setup.

ProVK

It's a 4 stud per cylinder engine making 950hp.

Is a the double o ring, one in head and one in the block?

Phil99vette

iTrader: (11)

At 950 you can probably get away with a precision finish and MLS.

ProVK

I've been running coppers with a oring in the block and no receiver groove. Does a receiver groove in the head help sealing?

SATAN

iTrader: (2)

Yes it does. When the O-ring pushes the gasket up, the receiver groove accepts the raised area of the gasket creating a mechanical lock.

eviltwin_1987

iTrader: (18)

ricer talk lol

SATAN

iTrader: (2)

Not sure if you are jesting or not (hence the jester). However, when talking about head gasket sealing, then HP per cylinder is a HUGE deal. If you had a one cylinder making 100whp or an eight cylinder making 800whp, both head gaskets are going to have very similar stresses they have to contend with.

The reason I mentioned 5 studs per cylinder vs. 4 should be obvious. More studs = less chance of lifting a head.

Beaflag VonRathburg

iTrader: (176)

On the doube O ring are both the receiver grooves in the head, block, or one in each? I could see the advantages of having more of a seal, but is the pressure exceeding the first seal?

EDIT: Just started looking into this more. How many people are driving around with an O ringed block, grooved head, and copper head gasket? Is it sealing everything that it should; oil, combustion, coolant?

Phil, I remember reading a post you made a while ago about using a tool versus a CNC machine to cut the grooves. I was just looking at the BHJ tool and found quite a few instances of it being used. In your experience were you having issues caused by the tool or was the CNC simply more precise?

crashly

Double o rings we use are, ....o ring in head, and o ring in block
They are stacked, ontop of each other.
Slightly thicker copper gasket used to grip
Strongest method