must block be bare to get decked?

[dsmputz]

I bought a used engine from a salvage yard and i've already ripped it apart to freshen it up (head gasket, water pump, oil pump, b-belt elimination, everything associated with the t-belt). I'm going with the cometic MLS HG and from surfing around the forums found that I had better get the head and block decked for the HG to seal properly. Now my question is, do I have to have the block and head totally bare for the machine shop to do this? or can I leave the pistons, crank in the block, and the valves and such in the head. I did a compression and leakdown test before the motor was ripped apart which showed compression to be 163-162-160-165 and leakdown in every cylinder was under 10%. The cylinder walls are in excellent condition with no vertical scratches and I can still see the crosshatch markes very well. Being as I have never totally ripped apart a block or head I don't want to mess around with this perfectly good setup. What are your opinions? Thanks for any answers.

 

[TRBOBLU]

Yes it must be bare. If you get metal shavings stuck in between the pistons and the cylinder walls you can whipe out a ring almost instantaneously.

 

[mjarrell20]

Yeah it has to be bare to have it decked.