Any tips, dos, don'ts, for mating surface prep for new gaskets? I am doing prep work before re-installing cylinder head onto engine block... Mind you, this is a cast iron block.
From what I've read, there seems to be heated debate about what is the best way to clean and prep each surface.
Here's what I've read/viewed:
1. Some say use 3M Scotch-Brite Roloc Bristle Disks attached to a drill, others say never use because you can round off edges of the deck.
2. Some say use 3M Scotch-Brite Scouring Pad (red or green), others say never use because you can scratch the surface too much.
3. Some say use a wire wheel on a drill, others say this is too aggressive.
4. Some say use a blade scraper, others say not to because you may gouge the surface
5. Some say to use fine grit sand paper and a sanding block, others say it makes for too much dust and particles that can get "into the engine"
6. Some say to spray shaving cream into the water jackets and various holes in the block to prevent particles from falling into the holes
I have noticed so far in examining the engine block deck.. there is hard crusty buildup in the holes of the engine block deck... some is dark black, some is light brown in color... I imagine pieces of this crusty stuff will easily fall into the holes when scraping, scrubbing... here are some pics:
From what I've read, there seems to be heated debate about what is the best way to clean and prep each surface.
Here's what I've read/viewed:
1. Some say use 3M Scotch-Brite Roloc Bristle Disks attached to a drill, others say never use because you can round off edges of the deck.
2. Some say use 3M Scotch-Brite Scouring Pad (red or green), others say never use because you can scratch the surface too much.
3. Some say use a wire wheel on a drill, others say this is too aggressive.
4. Some say use a blade scraper, others say not to because you may gouge the surface
5. Some say to use fine grit sand paper and a sanding block, others say it makes for too much dust and particles that can get "into the engine"
6. Some say to spray shaving cream into the water jackets and various holes in the block to prevent particles from falling into the holes
I have noticed so far in examining the engine block deck.. there is hard crusty buildup in the holes of the engine block deck... some is dark black, some is light brown in color... I imagine pieces of this crusty stuff will easily fall into the holes when scraping, scrubbing... here are some pics:
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