1983 BMW R80ST Refinish Aluminum Engine Block

I get a number of questions about how I achieve the “like new” patina on the engine block, transmission and rear drive. I previously published two documents on refinishing, so on this project I decided to create a short YouTube video showing the materials and tools I use and how I restore the aluminum to like new condition without bead blasting the engine block. Blasting the block requires complete disassembly and then meticulous and laborious cleaning of all the oil passages to guarantee no bits of glass are inside.

Here is the document and YouTube video I published. The document contains links to the other two documents about how I refinish various parts.

VIDEO: 1983 BMW R80ST Refinish Aluminum Engine Block

And here are some before and after pictures starting with what the R80ST looked like when I first saw it.

Engine Block & Transmission When I Found The Bike

Engine Block & Transmission When I Found The Bike

Engine Block When I Found The Bike

Engine Block When I Found The Bike

Lower Left Of Engine Block When I Found The Bike

Lower Left Of Engine Block When I Found The Bike

Lower Left Of Engine Block When I Found The Bike

Lower Left Of Engine Block When I Found The Bike

Oil Pan And Bottom Of Transmission When I Found The Bike

Oil Pan And Bottom Of Transmission When I Found The Bike

Here is what the engine block looked like after I removed it from the frame.

Left Side, Lower Block Still Filthy

Left Side, Lower Block Still Filthy

Shelf At Rear Of The Block Was Filthy With Thick Gunk I Removed With A Paint Scraper

Shelf At Rear Of The Block Was Filthy With Thick Gunk I Removed With A Paint Scraper

Right Side, Lower Block Still Filthy

Right Side, Lower Block Still Filthy

And here is the final result after working about 10 hours over 5 days on refinishing the aluminum block.

All Done-Left Side

All Done-Left Side

All Done-Left Side

All Done-Left Side

All Done-Rear

All Done-Rear

All Done-Right Side

All Done-Right Side

All Done-Right Side

All Done-Right Side

I hope this is helpful.

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