Head gasket choice

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iceteanolemon

iceteanolemon

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What kind of head gasket are you guys using? I am seeing a copper one out there....

What you guys think? I guess I would want to also know what people are doing with the barrel gasket too.... I hear some don't use one?


11-063844 Gasket, Cylinder Head, 750, Eyletted 10 - 26.89
11-064071 Gasket, Cylinder Head, 750, Copper 4 - 33.00
 
I tried the 750 flame ring gasket, I found a nice quality one, but they are a one time item. I had the head off a few times,
ended up using copper. Not a drop leaks. Anneal it properly and forget it. I also have a copper one on my 850,
the first time I tried to remove the head it wouldn't, the copper sealed it down tight.
 
I searched, read, talked to people. Hundreds of convictions. In the end, I used a .020" copper to bring my 850's compression UP to 9:1. http://www.jsmotorsport.com/technical_compression.asp I used the copper coat spray and silk thread as required by the maker. 4000 miles, no leaks. I'd do it the same way again.

Head gasket choice


Head gasket choice
 
I have the flame ring on mine currently, but if I had a choice I'd use the copper. I had a copper one on from about 7K to 13K, no problems. Which ever you get, get a quality one, not from DomiRacer. It just happened that I burned the copper one I had, so I couldn't re-use it.

Dave
69S
 
DogT said:
I have the flame ring on mine currently, but if I had a choice I'd use the copper. I had a copper one on from about 7K to 13K, no problems. Which ever you get, get a quality one, not from DomiRacer. It just happened that I burned the copper one I had, so I couldn't re-use it.

Dave
69S
Click to expand...


Yeah its not a large purchase and I want to do it right. I think its worth the extra 10 bucks haha
 
Flame ring gaskets require more re-torques but they seal perfectly -if kept tight.

Copper gaskets are more forgiving torque-wise. They usually end up seeping slightly eventually.

Pick your poison. I have copper on my 880- that is all that is available for the bore size. It seeps slightly even with thread and coppercoat but it has a lot of miles on it. I have flame rings on my other two 850s. Jim
 
My copper one never leaked, but then I never thrashed it much either.

Dave
69S
 
I just saw you asked about the barrel gasket too.. I used Loctite 518 and no gasket. Book says 850's used no gasket, so adding one would lower compression even further, opposite direction I wanted to go. It's oiltight so far.
Head gasket choice
 
G'day Concours, did you use the thread both sides of the copper gasket?
rgds foxy
 
Foxy said:
G'day Concours, did you use the thread both sides of the copper gasket?
rgds foxy
Click to expand...

Hello! Yes, I did it on both sides. I'm not sure how needed it was, It's an old method used back in the day before we had modern high performance chemicals to seal with. But, I figured it can't HURT anything... :lol:
 
tarrant6 said:
Hi,
What does Anneal it properly, mean, how do you do that to a copper gasket?
Click to expand...
When copper is compressed and worked it gets hard. This reduces its ability to form a seal.
When heated cherry red hot, the molecules rearrange and when quickly quenched in a bucket of water it sets this rearrangement.
Good to go.
 
tarrant6 said:
Hi,
What does Anneal it properly, mean, how do you do that to a copper gasket?
Click to expand...

Anneal= to soften A cake pan 1/2 full of water, a few .45 ACP cases for stanchions, lights out, propane to dull red, topple of the cases.
 
concours said:
tarrant6 said:
Hi,
What does Anneal it properly, mean, how do you do that to a copper gasket?
Click to expand...

Anneal= to soften A cake pan 1/2 full of water, a few .45 ACP cases for stanchions, lights out, propane to dull red, topple of the cases.
Click to expand...


Actually the copper is fully annealed once heated red hot. Quenching is not needed but the water quench does help to remove the scale. Jim
 
anneal - to free (glass,metals etc.) from internal stress by heating and gradually cooling. It's kinda fun ,wear big gloves !
 
concours said:
Foxy said:
G'day Concours, did you use the thread both sides of the copper gasket?
rgds foxy
Click to expand...

Hello! Yes, I did it on both sides. I'm not sure how needed it was, It's an old method used back in the day before we had modern high performance chemicals to seal with. But, I figured it can't HURT anything... :lol:
Click to expand...

Im thinking of using the silk thread both sides and held in place by Hylomar. May be an over kill in some minds, but I hate oil leaks! Another member mentioned how he Dremled a grove around gasket holes then lightly smeared silicone to form an O ring.
Not a bad idea as well.
 
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