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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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Diesel This is a new forum dedicated to diesel engines and their applicable accessories.


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  #11  
Old 10-01-2012
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Re: Engine paint.

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Originally Posted by zaliasvejas View Post
All good thoughts to consider...
What about the bolts that get unscrewed/screwed in the course of regular maintenance? Could they be replaced with stainless equivalents? None of them have grade ratings, I assume.. Has anyone come up with a livable solution?
Basically, no. Don't do it. Not on a Volvo. The impact on your wallet of mixed-metal corrosion are not worth thinking about.
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  #12  
Old 10-01-2012
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Re: Engine paint.

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Originally Posted by casey1999 View Post
Say you degrease the engine, and remove loose rust, if you use the factory paint (or equal) do you prime first? If so, with what? I was planning on using the Moeller engine paint on my yanmar. Got some of the zinc Chromate primer and the top coat paint which I plan to use. Also have a can of the yanmar engine paint (dark silver).

If one were to only use the yanmar paint, do you just paint over bare metal and rust with it or do you need to prime? If I use the Moeller zinc chromate primer, is this ok to use on bare steel, iron, and the aluminum gear box?
I can only speak of touch-ups on my Volvo MD2040, but I've never primed before spraying with cheap engine enamel and have, to date, had no issues with the paint flaking off after de-greasing and de-rusting first.
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  #13  
Old 10-07-2012
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Re: Engine paint.

Quote:
Originally Posted by zaliasvejas View Post
All good thoughts to consider...
What about the bolts that get unscrewed/screwed in the course of regular maintenance? Could they be replaced with stainless equivalents? None of them have grade ratings, I assume.. Has anyone come up with a livable solution?
BE CAREFUL!! It's not just about dissimilar metals corrosion - SS bolts do not have the tensile strength of steel bolts - especially Grade 5 or higher steel bolts. Put a SS bolt in the wrong place, and you could have engine parts joining you in the cockpit!!
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Old 10-09-2012
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Re: Engine paint.

You are right, Bellatrix...
There are also torque requirements to consider..
But as far as dissimilar metals go... the fuel pump front cover on my Volvo is aluminum...
Raw water pump is brass... and it all attaches to iron block! Dang, and it all gets painted with the same paint? What gives?
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Old 10-09-2012
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Re: Engine paint.

Flat surface corrosion isn't going to be as tough as corrosion imbedded in the threads of a screw that won't back out.
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