? on headgasket preparation

[87SFI]

I'm putting on stock headgaskets soon and my friend suggested that I take a sanding block with 100 grit to clean the surface of the block. Does that sound right? What do you guys do to clean them up?

Thanks
George

 

[tc86gn]

never heard of that one before.

 

[Nick Micale]

I use the same method but NOT with 100 grit. Should use 320 automotive grade. Do not use a rubber block, but something flat
and hard. A block of steel about a foot long with the paper wrapped around it will do fine.

 

[87SFI]

Thanks for the reply. The 320 grit sounds better to me. What kind of torque do you set the bolts at? I hear from 60lbs and up. I also am using arp.

Thanks
George

 

[bob86gn]

What about the metal chips getting into the cylinders?

I have a couple books on engine rebuilding and two of them say to rough the block with sandpaper prior to installing the heads but I am concerned about any metal getting into the cylinders and scoring the cylinder walls.

Hope to be doing my heads by next weekend, hopefully we have a concensus by then.

 

[Nick Micale]

Originally posted by bob86gn
What about the metal chips getting into the cylinders?
..........................

I would "assume" there would be compressed air to blow out the debris?

 

[Intercooler]

I use some 60 grit folded up to just scuff the surface up so they aren't shiny. http://www.gnttype.org/techarea/pictureguides/blocks/8687SG.html

Try to do it unassembled and like suggested use air then brake-clean