[VonBimmer]

First, some caveats:

This engine is on a rack. It has not been turned over or ran at all.

I was performing an engine swap on my 335I, replacing my N54 that had a rod knock. The exterior was getting sandblasted before painting/polishing the engine block, and unfortunately, a piece of tape gave way and blast media was able to enter parts of the engine.

As of now it appears that it is in the crank case, and on the valves. I do not think it is in the cylinders…. Yet.

I have sprayed with brake cleaner and diesel fuel, but I feel that much more needs to be done before I close the engine up.

Here are my ideas:

• Flush the engine with oil and Lucas engine oil flush. Essentially pour into the valve cover, let it run through engine, drain and filter from the oil pan and repeat until it comes out clean.
• Other products I could use diesel, marvels mystery oil, psc 1000 solvent
• Other options: Completely disassemble engine, pull heads, etc

Here’s a picture of the engine and its current state, so you good idea of how far is broken down. Mark it up to a hard lesson learned.

Just to get it out of the way, yes, I was dumb.

[E93Seattle (Racerbruce)]

i looked up "what is the diameter of a sand particle from a typical beach" and it states it is 0.06mm to 2.0mm.

you could attempt to id the diameter of the sand used in your blasting process (ie: grit #, etc).

once determined, you could then attempt to speculate if a particle that size could pass through a bearing journal's design clearance.

this wild attempt to id all of this may tell you what the risks are if a particle of sand did not get flushed and remained in the engine and found its way to a bearing journal.

i am hopeful someone will post that has experience in such matters and can provide you with options.

[VonBimmer]

That’s an interesting approach.

I think the blast media used was aluminum oxide…. Med grit

Maybe that makes a difference?

[e90yyc]

That fucking sucks…

Best of luck getting it sorted!