About replacing nuts and bolts

[WP0ZZZ]

In the past, whenever I've refurbished a part in my 911 I've tried to replace the bolts, washers and nuts with new ones. I now have a feeling that new hardware (even when purchased from Porsche) sometimes does not match the quality of the factory-installed one. I'm currently having second thoughts about systematically replacing hardware. What do you think?

[Mixed76]

If not single use or significanttly corroded or damaged there's no reason to replace fasteners.

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[proporsche]

I am going through this with some on my engine rebuilds...Boys like the zink stuff..and i hate it..
Did some research..the original stuff was cadmium plated..so not so yellow as everybody does nowadays.Here in Europe is hard to get them ..stupid taxes on import..
here is a link for ya..
Personally,i use mainly the original what i took of the engine or transmission or i use new nuts and bolts (has to be 8,8)

Ivan
https://www.amazon.com/Hardware-Nuts-Cadmium-Fasteners/s?keywords=Hardware+Nuts&rh=n%3A16409861%2Cp_n_feature_thirteen_browse-bin%3A15245617011&c=ts&ts_id=16409861

[Robert Adams]

Most of the time I replated (yellow, some silver and black cad) my original screws, nuts, bolts and washers mostly to keep them from corroding or rusting out. Any that had corrosion were replaced. That said, these are 50-year-old parts so on things like the bolts holding brake parts or hubs I replaced with new Porsche factory parts attempting to avoid metal fatigue. Replacing with 8.8 or better is the trick to structural success. Lots of prep is the path to visual success.
Replating is not for the faint of heart; took me the better part of 8-9 months mostly in prep to get 95% of the stuff done for one car. Overall it wasn't terribly expensive compared to other projects such as anodizing aluminum or re-chroming. This picture is only about 20% of what was replated. FYI, the headlight assemblies were painted in a special over cad primer and painted in a factory look stain epoxy gray. Loads of fun stuff!

[Shaun @ Tru6]

I would rather have properly replated original German hardware than the new Chinese junk that Porsche sells under its name today. Original hardware also has correct head markings from the many manufacturers Porsche used.

If you have anything replated do your best to have it done in yellow cadmium, especially if you use your car, it's far superior to zinc. And make sure its baked to reduce hydrogen embrittlement.

Porsche used zinc for everything in 911s, the only cadmium I've ever been able find is fan hubs up to 69. Other than those, yellow zinc was used throughout the car.

[Dpmulvan]

Cadmium has been banned in Europe. Zinc dipped in sodium dichromate ( copy cad/ yellow chromate) and Cadmium are not the same.

[proporsche]

Originally Posted by Dpmulvan

Cadmium has been banned in Europe. Zinc dipped in sodium dichromate ( copy cad/ yellow chromate) and Cadmium are not the same.

yup in Europe yes but not in USA..or?That is the reason i put in link for amazon..
Ivan

[stownsen914]

Shaun provides a great replaying service and have worked with him on a few occasions with good results.

I’d have to agree that new hardware is not as good quality. And many of the plating processes of the past are now banned due to hazardous chemicals that were used. I’ve found that newer hardware is not as resistant to corrosion. Sigh.

If the old stuff cleans up nicely, personally I’d keep it in service.

[proporsche]

Originally Posted by Shaun @ Tru6

I would rather have properly replated original German hardware than the new Chinese junk that Porsche sells under its name today. Original hardware also has correct head markings from the many manufacturers Porsche used.

If you have anything replated do your best to have it done in yellow cadmium, especially if you use your car, it's far superior to zinc. And make sure its baked to reduce hydrogen embrittlement.

Porsche used zinc for everything in 911s, the only cadmium I've ever been able find is fan hubs up to 69. Other than those, yellow zinc was used throughout the car.

looks great.....if it is done right....
ivan

[Loz]

Ive just purchased a complete plating kit from Gateros Plating here in the UK.
As mentioned previously in the thread Chrome 6 has been banned in most countries (strangely not yet here!) but has been replaced with a less nasty version.
My intension is to replate all serviceable parts on my car and replace worn out items.

Hard work and rather laborious but as stated, better than the poor quality replacements being offered today on the market.

[mepstein]

I ordered some suspension hardware from Porsche, picked it up st my local Porsche dealer, it wasn’t even plated. I usually prep my old hardware with a glass bead blaster and/or wire wheel on a grinder and send it out for plating. There is too much odd sized pieces of hardware and small brackets that would be hard to find new and probably expensive when it’s all added up.