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Lead used to lube valve stems?

Engine tech, for those engines, products, and technologies of yesteryear.

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Posts: 655
Joined: Sat Mar 04, 2017 6:53 pm
Location: South Australia

Re: Lead used to lube valve stems?

Post by hoodeng »

These are my pipes after a decent run, probably 300km no stops and at highway speed, total that weekend 750km or so all highway speed. No lead or additives, 98 octane fuel [your 95], no residue. Pipes look like this after every long run.

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Posts: 262
Joined: Mon Aug 06, 2007 4:24 am
Location: El Cajon CA

Re: Lead used to lube valve stems?

Post by Mummert »

Leaded fuel is radically corrosive post combustion. Wearing out cylinder bores, iron exhaust guides, and all things related to the exhaust seem to be what it does best. A set of mild steel headers that have been run with leaded fuel look like they have been at the bottom of the ocean for a 100 years.
It makes cringe when you install old dyno headers, your hands turn rust red, it gets on your clothes, half the time you dump a spoonful of rust on your shoes. Stainless steels headers and bronze guides are must!
Raising octane is the other thing it does well.
Mummert Machine and Development 4 stroke hp
Mummert Y-blocks
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