Best Way to Clean Top Of Block and Piston Tops?

[RRoller123]

Ok, motor heads. I know some of you know the answer to this.

What is the best way to clean off all the crud and carbon deposits from the top mating surface of the block, and from the piston tops, prior to re-assembly?

Do I just scrape it carefully with razor knife? Carb cleaner spray? Plug up all the various holes? Lightly sand with 600 and a flat block?

The new head is obviously perfectly clean, but the block needs to be cleaned up.

Thanks!

Pete

[124JOE]

use a razor blade just dont dig into it
lay it sideways at 45 angle and pull the crud off

[lglade]

The razor blade would work on the flat surfaces of the block, but if you want to clean those pistons (soft material with compound curves) you might use some Sea Foam on a rag. And yes, you want to avoid getting any crud into any of the passages, so don't let debris accumulate as you work.

[djape1977]

brass brush on a drill does wonders

[RRoller123]

Excellent, thanks for the tips.

Pete