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Re: Head Bolts

The two main problems with stainless steel alloys is that it's more prone to fracture that high tensile steel alloys.
It's bad enough that most machine shop don't understand the properties of steels let alone Stainless grade steel alloys.
Another problem that is often overlooked is the galvanic corrosion between mild steel and and stainless steel.
It's a big problem with older busses and coaches. It seemed like a good idea skinning them in stainless with a mild steel frame. Once you get some mud and water in the interface area the magic starts. A few years later and the coach looks sound, but is rotten behind it's skin.

Things do change though, I remember when motocross wheels built with stainless spokes collapsed. They seem to work ok now.

email (option): pes.sales@btconnect.com

Re: Head Bolts

I've used stainless fasteners for decades and can't honestly say galvanic corrosion (or the results of it) have been an issue...There are grades for most applications. In my last job (a pharmaceutical manufacturer) we had production machinery and pumps etc. produced entirely in stainless steel, rotors, shafts, fasteners etc. etc....Ian

email (option): ian@wright52.plus.com

Re: Head Bolts

I have bought these in the past to use as head bolts: https://www.ebay.co.uk/itm/185058276439?ViewItem=&item=185058276439

Regards,
Bastiaan

email (option): wdmotorcycles@gmail.com

Re: Head Bolts

Well the take away from that & just bout eery other monkey with a tension wrench video is just about all of them are as strong or stronger than the bolt
I am not a fan of helicoils in BSF as the wire is no longer the correct diamond shape it once was so they tend to strip the threads off the bolts if overtightened.
I run some shadows as hire cars and it was interesting when I first took a spannar to one and noticed every hole in the alloy was helicoiled, including the plug holes
Fail to put some lube on the plug threads and you can forget about changing plugs
The mobile thread repaired ftted bronze ones and that was the last time We ever had a frozen plug

Re: Head Bolts


WM for sure.... there is more than just bench testing to see how these things really compare or perform in real applications.

I posted the video to see what experienced people who have worked with such repairs have found.

Thanks for the info.

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