Cleaning engine alloy

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Druk

Gone but not forgotten - RIP
Joined
May 28, 2004
Messages
5,300
Location
Not far from Edinburgh.
Car
2011 S212 E350CDi. 1981 R107 300TurboDiesel.
As the title. How to clean dirty, oil-stained and in some parts slightly whitened alloy engine castings? Is there a magic bullet without the vapour blasting technique? Some bits I simply can't take off the engine.
 
There is, nasty stuff, its called HF.
Its found in various good ally cleaning products like Air conditioning coil cleaners and especially useful ally wheel cleaner. Make sure you wash it of well then spray ally with a sticky silicon lubricant regularly to stop it degrading again.
 
I used Autoglym engine cleaner recently, just wipe off, good stuff
 

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