BMW 2-valve engine black coating (part of an engine overhaul)

BMW 2V Boxer engines black thermodynamic coating (only in conjunction with an engine overhaul).

Simply painting over the entire engine with a heat-resistant paint is not a good idea. There are several reasons for this:
 It starts with the fact that the individual engine parts have to be prepared, i.e. degreased and roughened. The best method for this is blasting. If the blasting cabin is large enough, you can simply process the entire engine in it. The danger here is that blasting material gets into the interior of the engine and causes damage later. Therefore, it is better to disassemble the engine after cleaning and clean it thoroughly.
You can also prepare the engine laboriously with an abrasive sponge. This works quite well on the smooth surfaces, but between the cooling fins it is almost impossible to ensure good painting conditions. Since the cylinders of a 2-valve boxer engine are exposed to the wind, the paint is bound to peel off.
Ultimately, however, it is not possible to simply paint over all the parting surfaces. An engine consists of many individual parts (oil sump, cylinder, cylinder head, control box, etc.) that are screwed together with gaskets in between. On the one hand, the varnish on the gaskets, which are usually made of paper, will not hold and will flake off, reinforced also by the fact that the engines outgas oil through the gaskets. At the latest, if you want to adjust the valves and remove the cover for this purpose, the cohesive layer of paint is torn apart. 

That's how it works on the SE Concept Bike:
The engines are completely disassembled. For this reason, we only offer the black thermodynamic coating in conjunction with an engine overhaul for the BMW 2-valve engines.
Everything is carefully masked off so that no blasting material or coating gets inside the engines, which could later lead to engine damage. The crankcase is completely sealed airtight with special covers. Only when everything is well protected and well prepared does it first go to blasting and then to coating.
After everything appears in new splendour, all parts are cleaned very carefully. All oil channels are checked to ensure 100% that no foreign material has penetrated.

When all this is prepared, the rebuilding of the BMW 2-valve Boxer engine can begin.