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Author Topic: Install Stainless Steel engine bolt kits  (Read 1057 times)

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Offline akabek

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Install Stainless Steel engine bolt kits
« on: October 20, 2012, 08:29:43 PM »
For those that have used a stainless steel allen bolt kit for there engine did you use anti seize or locktite?  If you used both where did you use locktite verses anti seize?
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Offline Elan

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Re: Install Stainless Steel engine bolt kits
« Reply #1 on: October 20, 2012, 09:10:22 PM »

I just used anti seize. But I just heard(but haven't confirmed) that 18-8 stainless does not corrode aluminum....

I don't think loctite is really necessary- honda didn't either
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Offline Jiminy Indy

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Re: Install Stainless Steel engine bolt kits
« Reply #2 on: October 21, 2012, 05:44:29 AM »
Well just from personal experience I didn't use either last winter and found that over the summer that the bolts have loosened on the valve cover so I put locktite on all of them and it's been a month of so without seeing anything getting looser - all still nice and tight.
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Offline lucky

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Re: Install Stainless Steel engine bolt kits
« Reply #3 on: October 21, 2012, 05:53:27 AM »
Quote from: Elan on October 20, 2012, 09:10:22 PM

I just used anti seize. But I just heard(but haven't confirmed) that 18-8 stainless does not corrode aluminum....

I don't think loctite is really necessary- honda didn't either

Every time you put dissimilar metals together there will be corrosion.
One metal becomes the anode and the other metal is the cathode.
One of the two metals is sacrificed for the other metal.
The rate of corrosion depends on how far apart the two metals are on the galvanic scale. And how apart they are physically.
Steel and aluminum get along with each other and so does stainless and aluminum.
The question is which is the better choice.
Steel would be a better choice than the stainless. In both cases the aluminum would be the more active metal and would corrode more than the steel or the stainless.
BTW that term 18-8 is not used much anymore, they call it 304 stainless now.

I have pulled the engine mount bolts on a lot of aluminum engines and it is always the aluminum that is corroded,not the bolt.
With a stainless bolt you are just making the situation worse.

Ask any owner of a sailboat about that problem of stainless and aluminum together.

« Last Edit: October 21, 2012, 06:02:18 AM by lucky »
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Offline akabek

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Re: Install Stainless Steel engine bolt kits
« Reply #4 on: October 21, 2012, 01:00:14 PM »
It is understood that two dissimilar metals will cause problems.  Based on the responses it sounds like it is a good idea to use anti seize.  For the cylinder head cover should all the bolts be used with anti seize?
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Offline lucky

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Re: Install Stainless Steel engine bolt kits
« Reply #5 on: October 21, 2012, 01:27:36 PM »
Quote from: akabek on October 21, 2012, 01:00:14 PM
It is understood that two dissimilar metals will cause problems.  Based on the responses it sounds like it is a good idea to use anti seize.  For the cylinder head cover should all the bolts be used with anti seize?

Anti seize is used on bolts that get hot. Like exhaust manifold bolts and spark plug threads.
For corrosion protection I would use Boesheild.
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