Rusty studs

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Dave B
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Rusty studs

Post by Dave B »

Just wondering what others do about the rust that builds up on cylinder and head studs. Every time I tear the old girl down the studs are somewhet rusty or covered in white powder, I understand the powder is from dissimilar materials reacting with one another. I usually just clean them up, chase the threads to remove the build up and install ..... only to have it happen again. Is there an agent that prevents this?
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My understanding was when torquing it is to be a dry torque, any compound would throw a wrench at that theory.
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Re: Rusty studs

Post by KDXGarage »

007
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Re: Rusty studs

Post by KDXGarage »

I think you are doing more than most people to wire brush and chase threads.

A dab of grease or paint on the studs, non threaded portion??
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Re: Rusty studs

Post by Timtee »

When I saw the title of your post it reminded me of the 70’s - Rusty Studs was a well know porn star back then.
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doakley
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Re: Rusty studs

Post by doakley »

I’ve always used anti-seize without a problem. That white powder you see is aluminum oxide, “aluminum rust” if you would. Not a good thing.
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Rusty studs

Post by Dave B »

Well Timtee I'm not to sure about your 70's but I'm a bit concerned!!
Anti-seize on just the shoulders of the stud or threads and all? If on the threads do you adjust the torque value? Don't want to start a lubricated torque and dry torque debate!!
I have seen what i would consider severe aluminum oxide on studs in the past and always just figured it was a nature of the beast kind of thing. Even seen where a nut would practically bond ... James Bond....to a stud and back it out with the nut.
Just curious on how to prevent it... if possible.
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Re: Rusty studs

Post by doakley »

It is because of dissimilar metal contact. Prevent the contact and you eliminate the problem. Truth is you cannot totally prevent the contact, but grease, antiseize, etc. helps.
I won't comment on the wet/dry torque debate. Just what has worked for me.
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ericr
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Rusty studs

Post by ericr »

I boogered up a couple of my studs and had to order replacements. They came pre-coated with red loctite. That makes me wonder about using any type of anti-seize. If you wish to prevent dissimilar metal corrosion, I was planning on using Tef-Gel. It's used extensively in the marine industry to prevent this type of corrosion on fasteners.
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Dave B
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Re: Rusty studs

Post by Dave B »

I looked it up and it should definitely prevent the corrosion. The description does recommend adjusting your torque values. For motorcycle applications I think I will stick to plain old anti-seize....and I have lots of it.
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