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Magnesium Chem. Treatment For Pre-A Eng. and 519 Trans.
http://forum.porsche356registry.org/viewtopic.php?f=21&t=45326
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Author:  Joe Ruiz [ Wed Jan 10, 2018 4:13 am ]
Post subject:  Magnesium Chem. Treatment For Pre-A Eng. and 519 Trans.

This process duplicates the factory finish for Pre-A 2pc. case engine blocks and 519 Split case transmissions.

This is a Pre-A 1952 block that has been chem. treated. Cyl. decks surfaced, line-bored and all oil galleys
drilled and tapped for 100% positive cleaning. Same block.....BEFORE & AFTER.

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Author:  Alfred Knittel [ Thu Jan 11, 2018 10:49 pm ]
Post subject:  Re: Magnesium Chem. Treatment For Pre-A Eng. and 519 Trans.

Dose that look brand new The crank is new to stander bearing having it polished now

Author:  John Brooks [ Thu Jan 11, 2018 11:38 pm ]
Post subject:  Re: Magnesium Chem. Treatment For Pre-A Eng. and 519 Trans.

Alodine has been used in the aircraft industry for ever. It's a dip or brush process, Henkel developed it just before WW2. It's not expensive but it can be hard to dispose of. Most civil airports will have a repair station or FBO that has a alodine tank and will do the process for you at a reasonable price, or maybe free if you tell them it's for a 356. Clean and prep your parts before you head for the airport, clean is an important part of the process. It comes in gold or clear. It's not hard to do, the dip is just a minute or two depending on the strength and age of the mixture.


http://na.henkel-adhesives.com/product- ... 7999529985
https://www.youtube.com/watch?v=6zWed-NISUY

Author:  Martin Benade [ Thu Jan 11, 2018 11:57 pm ]
Post subject:  Re: Magnesium Chem. Treatment For Pre-A Eng. and 519 Trans.

What is the purpose of the coating. Was the original the clear version? Nothing I have ever seen unrestored seemed to have even a hint of a goldish color.

Author:  Dan Epperly [ Fri Jan 12, 2018 12:59 am ]
Post subject:  Re: Magnesium Chem. Treatment For Pre-A Eng. and 519 Trans.

Martin Benade wrote:
What is the purpose of the coating. Was the original the clear version? Nothing I have ever seen unrestored seemed to have even a hint of a goldish color.



Sometimes on the 36hp cases on the flywheel side you can see the coating. It's no where near as blingy as the picture Joe posted, but then the cases are at least 56 years old.

Author:  Joe Ruiz [ Fri Jan 12, 2018 1:18 am ]
Post subject:  Re: Magnesium Chem. Treatment For Pre-A Eng. and 519 Trans.

John Brooks wrote:
Alodine has been used in the aircraft industry for ever. It's a dip or brush process, Henkel developed it just before WW2. It's not expensive but it can be hard to dispose of. Most civil airports will have a repair station or FBO that has a alodine tank and will do the process for you at a reasonable price, or maybe free if you tell them it's for a 356. Clean and prep your parts before you head for the airport, clean is an important part of the process. It comes in gold or clear. It's not hard to do, the dip is just a minute or two depending on the strength and age of the mixture.

http://na.henkel-adhesives.com/product- ... 7999529985
https://www.youtube.com/watch?v=6zWed-NISUY

John. Alodine is commonly used in the aircraft industry. It helps prevent corrosion. Don't want corrosion on any part of an airplane that is several thousands of feet in the air......especially if your in it!!!! The problem in this particular case (pun intended) is Alodine is not for MAGNESIUM on these blocks. Maybe you didn't see the first word in my subject topic line. I worked and retired from the aerospace industry and we used alodine to treat parts shipside when we "modified" them to fit.

Although I'm not a chemist and don't know what type of process or chemicals is used to get this finish on magnesium, I do know that it duplicates the original finish and also protects the magnesium against corrosion, provides a good base should the product be painted and allows the engine to "breathe" sorta speak. It does not seal its pores thus allows the magnesium to dissipate heat. I've even seen people trying to duplicate this finish with rattle can gold paint!?! Sheesh! :shock: Not only does the engine run hotter when it's painted, when gasoline comes in contact with paint, it will lift and run and look terrible.

This process should not be done by any novice! This process should be left to the professionals with proper training in using/handling these caustic chemicals.

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Author:  John Brooks [ Fri Jan 12, 2018 1:23 am ]
Post subject:  Re: Magnesium Chem. Treatment For Pre-A Eng. and 519 Trans.

The bling will fade some over time, early on, the gold was more brownish, but it's is a chromatic coating only a couple an atoms thick.

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Author:  Joe Ruiz [ Fri Jan 12, 2018 2:21 am ]
Post subject:  Re: Magnesium Chem. Treatment For Pre-A Eng. and 519 Trans.

Here's a 1952 / type 546 engine / 1500cc engine and Pre-A 519 Splitcase 550 transmission

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Author:  Joris Koning [ Fri Jan 12, 2018 4:08 am ]
Post subject:  Re: Magnesium Chem. Treatment For Pre-A Eng. and 519 Trans.

Joe,

The original mag pieces I have seen all had an iridescence sheen. Do yours have this also? What do you charge for an engine or transmission case?

Thanks,

Joris

Author:  Vic Skirmants [ Fri Jan 12, 2018 8:42 am ]
Post subject:  Re: Magnesium Chem. Treatment For Pre-A Eng. and 519 Trans.

John Brooks wrote:
The bling will fade some over time, early on, the gold was more brownish, but it's is a chromatic coating only a couple an atoms thick.

John; is the nose on that very early 519 magnesium? And that's why it's gold? Otherwise the aluminum ones were left silver.
What is the serial number on that one? Thanks.

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