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Rust Oyster Removal Inside Engine


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#1 shadey1963

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Posted 24 January 2018 - 08:41 AM

What chemicals, methods, etc, have people used to successfully remove the rust oysters inside the cooling galleries on their motor.

 

Appreciate any help.

 

Steve



#2 TerrA LX

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Posted 24 January 2018 - 10:33 AM

Rust oysters?



In any event, nothing beats stripping the block and hot dip.

Short of that all screw and welsh plugs out and flush.
I have seen 1 inch deep cruddy rusty mud in the bottom of blocks.



#3 CI 0308

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Posted 24 January 2018 - 12:16 PM

I have a bare block that I am working on at the moment and hasn't been to the machine shop as yet but I have pressure cleaned into every opening I can and scraped with screw drivers etc and there is still stuff that falls out of it every time it is turned on the engine stand. The amount that comes out is amazing. So I suggest that hot tanking is about it which it will get when machined.



#4 Ice

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Posted 24 January 2018 - 02:14 PM

Hot tank

#5 Rockoz

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Posted 25 January 2018 - 12:17 PM

Hot tank is the best way.

Any decent machining shop will have one.

You may be able to get them to keep it in the tank over a weekend for some extra coin.

Alternatively you could set up your own bath and soak it for a week or two with the molasses mix often bandied about.






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