waybad

iTrader: (4)

I have a 99ls1 block with the factory graphite gaskets, I am putting the 243 heads on this block with the 2001 up factory gm multi-layer gaskets.. the old heads had the diamond recessed into the heads requiring graphite type of factory gaskets, they left a mess, how would you clean the block surface,, should I put any type of copper coat on the multi-layers before I put them on?
Thank you for your time!!
Tinker

Darkman

iTrader: (2)

I know of no quick way to clean the block deck - it requires time and patience. Put some rags in the cylinders to block debris. You can use razor blades to start but be careful not to gouge the surface. Plastic scrappers are also useful. For solvent I used brake cleaner.

Also getting coolant out of the bolt holes is very important to avoid cracking the block on reassembly. For that, I use twisted paper towel, but that does involve some risk because if the paper towel comes apart it can be difficult to remove.

95wannabe

iTrader: (20)

Vacuum works well for that, plus rolling the block over on the stand so holes face the ground....gravity is your friend

waybad

iTrader: (4)

thanks guys,,,

BrntWS6

iTrader: (7)

I used the 3M roloc discs that are for aluminum attached to my air compressor. I know guys don't like them but getting those gaskets clean is a real pain. I had both sides done and clean enough to eat off in 15 minutes.

Make sure you cover any sensitive areas real well because it flings small particles everywhere.

redbird555

iTrader: (14)

I went to autozone and if you go to the section where they have rtv, permatex sells a gasket remover that comes in a can. I used 2 cans one for each side you just apply it to the head surface and wait about 20 mins and the gasket material just kind of brushes off with a scraper

usdmholden

In the past I have actually used the green pot scrubbing pads from the kitchen to fine clean after scraping. They are not much different than the 3M pads.

I have a hardened steel scraper on the end of a screwdriver blade and use it slowly and carefully. Razor blades work well also for small spots.

3rdCoastPowerSports

iTrader: (5)

I would be way to nervous to use the "quick" method on an aluminum block.

Blackpanther99

iTrader: (8)

This^^

BrntWS6

iTrader: (7)

The pads I used are made for aluminum. Two years later everything is fine. I know GM had a TSB for their techs using them awhile back but that was from the particles getting everywhere, I taped everything up I thought needed it.

waybad

iTrader: (4)

thanks,, never thought about this stuff.. i think I have a can somewhere