Stainless steel head studs.

[soe8m]

The sprint doesnt have the same problems because the studs are submerged in oil

Dave

Not correct, only one is.

Jeroen

[Carledo]

The sprint doesnt have the same problems because the studs are submerged in oil

Dave

Not correct, only one is.

Jeroen

Submerged? Not exactly! But the point is that ALL the studs and nuts and the head bolts on a Sprint are under the cam cover, protected from the elements and (hopefully) splashed at least with oil, whereas on an 1850, TR7, or Stag the tops of the studs and the nuts and washers are out in the open, which allows atmospheric water to permeate the joint and eventually to enter the stud tubes and corrode the studs. It's not so much galvanic corrosion that is the problem, the Sprint proves that, it's one of good old fashioned RUST!

I probably did my first Sprint head gasket in 1974 and have done uncounted numbers since. Never ONCE have I encountered any difficulty getting Sprint studs out, usually by the time honoured method of double nutting them. Stags, 1850s and TR7s are a totally different proposition and one I still, after all these years, approach with trepidation!

On a purely personal note, I don't think i'd be inclined to use stainless studs, simply from concerns about their strength, stainless has different properties to mild steel and reacts in different ways to heat cycles etc.

Surely it would be easier and a lot cheaper to merely put a film of silicone on the underside of the head nut washers to stop most of the ingress of water into the stud cavities. The NEXT head gasket will be in so many years that it will be SEP, (somebody elses problem!)

Steve

[matt of the vivas]

Thanks Steve, sensible reply.

[matt of the vivas]

Copaslip is not conductive?

That will be something intranslation. It conducts electrical current but maybe it's translated different. It's not an isolator between the stainless steel and alloy but will only speed up the corrosive process.

Jeroen

Copaslip is not conductive, not even slightly....

[matt of the vivas]

Copper grease is definitely conductive because it has bits of copper in it, which is an excellent conductor.

No. It's not.... Let's please kill this myth here and now. Not conductive....

[cleverusername]

Copper grease is definitely conductive because it has bits of copper in it, which is an excellent conductor.

No. It's not.... Let's please kill this myth here and now. Not conductive....

Really?

https://www.greasemonkeydirect.com/blog ... -used-for

Copper Can Interfere with Electrical Components - (copper is a conductor and can have detrimental impacts on electrical systems eg: magnetic sensors in ABS braking systems)

I am not saying that I would use the stuff in a circuit as a conductor but I would astonished if something with copper particles in it was a good electrical insulator.

[cleverusername]

The sprint doesnt have the same problems because the studs are submerged in oil

Dave

Not correct, only one is.

Jeroen

Submerged? Not exactly! But the point is that ALL the studs and nuts and the head bolts on a Sprint are under the cam cover, protected from the elements and (hopefully) splashed at least with oil, whereas on an 1850, TR7, or Stag the tops of the studs and the nuts and washers are out in the open, which allows atmospheric water to permeate the joint and eventually to enter the stud tubes and corrode the studs. It's not so much galvanic corrosion that is the problem, the Sprint proves that, it's one of good old fashioned RUST!

I probably did my first Sprint head gasket in 1974 and have done uncounted numbers since. Never ONCE have I encountered any difficulty getting Sprint studs out, usually by the time honoured method of double nutting them. Stags, 1850s and TR7s are a totally different proposition and one I still, after all these years, approach with trepidation!

On a purely personal note, I don't think i'd be inclined to use stainless studs, simply from concerns about their strength, stainless has different properties to mild steel and reacts in different ways to heat cycles etc.

Surely it would be easier and a lot cheaper to merely put a film of silicone on the underside of the head nut washers to stop most of the ingress of water into the stud cavities. The NEXT head gasket will be in so many years that it will be SEP, (somebody elses problem!)

Steve

Oh I see, never actually seen an 1850 head, didn't realise the difference. Isn't the problem igoing to be heat? Is anything you place on the studs likely to stay there long with the heat, not to mention the differential expansion of the head and studs?

[matt of the vivas]

Copper grease is definitely conductive because it has bits of copper in it, which is an excellent conductor.

No. It's not.... Let's please kill this myth here and now. Not conductive....

Really?

https://www.greasemonkeydirect.com/blog ... -used-for

Copper Can Interfere with Electrical Components - (copper is a conductor and can have detrimental impacts on electrical systems eg: magnetic sensors in ABS braking systems)

I am not saying that I would use the stuff in a circuit as a conductor but I would astonished if something with copper particles in it was a good electrical insulator.

Solid copper is an excellent conductor. Grease is not. Copaslip is tiny particles of copper suspended in grease.
If you do not believe me, use a multimeter on its resistance setting and measure a blob of copaslip. I promise you, it is not conductive in the slightest.

[Mad Mart]

I was certain too that copper grease would be conductive as, I expect, are many others. As I have a bench power supply & multimeter in the garage I thought I would try it out, as Matt suggested. Sure enough, no beep on the MM and when I put 12V through it no current passed either.

[matt of the vivas]

Thanks for making the effort to actually test it.
So many people repeat this myth about copaslip without ever having tested it..... Drives me crazy!

[TrustNo1]

These stainless steel head studs,are aircraft grade

That doesn't mean they are the correct tensile strength!

[new to this]

These stainless steel head studs,are aircraft grade

That doesn't mean they are the correct tensile strength!

As far as i know,theres only one triumph trader Wards selling these stainless studs,they had them made,they rebuild Stag engines and have a good reputation,so i would have thought the material they used would be up to the task its designed for

Dave