Rusty studs

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Rusty studs

Postby Dave B » 09:16 pm Mar 12 2018

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

Postby Jason » 10:07 pm Mar 12 2018

007
Thank you, Julien D for all your hard work!

PLEASE! Do not "dip" PWK Keihin carbs in Berryman's to clean them! It will damage the internal o-ring (jet block gasket).
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Re: Rusty studs

Postby Jason » 10:12 pm Mar 12 2018

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??
Thank you, Julien D for all your hard work!

PLEASE! Do not "dip" PWK Keihin carbs in Berryman's to clean them! It will damage the internal o-ring (jet block gasket).
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Re: Rusty studs

Postby Timtee » 05:40 am Mar 13 2018

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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Re: Rusty studs

Postby doakley » 10:29 am Mar 13 2018

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

Postby Dave B » 05:05 pm Mar 13 2018

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

Postby doakley » 09:14 pm Mar 13 2018

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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Rusty studs

Postby ericr » 01:14 pm Mar 15 2018

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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Re: Rusty studs

Postby Dave B » 08:13 am Mar 17 2018

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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