Deck surface RA...
Deck surface RA... What's up guys, so I'm curious to see what u guys think of my deck surface for Cometic MLS head gaskets? Hopefully some1 can tell by the pics I post?
History is, I measured deck height and instructed the machine shop to square up the block. Machinist said he did not recommend decking the block after everything was finished and I went to pay and b pick up. So I picked everything up and cleaned, de- burred, and washed the block twice. Not realizing the smoothness I need for the head gaskets.
B4 I finally assembled and washed block for the 2nd time I went over the deck with 400 grit wet sandpaper.
Here's the pics, maybe some1 can see if I need a smoother surface. Thanks for any help on this...
History is, I measured deck height and instructed the machine shop to square up the block. Machinist said he did not recommend decking the block after everything was finished and I went to pay and b pick up. So I picked everything up and cleaned, de- burred, and washed the block twice. Not realizing the smoothness I need for the head gaskets.
B4 I finally assembled and washed block for the 2nd time I went over the deck with 400 grit wet sandpaper.
Here's the pics, maybe some1 can see if I need a smoother surface. Thanks for any help on this...
From memory as it was 8 years ago, I used 400 grit on my deck. I was fortunate enough to borrow and Ra meter from work and found the surface was typically below 30 Ra so you should be OK. I would also recommend using Hylomar on the Cometic gasket. Hylomar was originally design for turbine engines and it works really well. Its a little hard to find but worth it in my book.
From memory as it was 8 years ago, I used 400 grit on my deck. I was fortunate enough to borrow and Ra meter from work and found the surface was typically below 30 Ra so you should be OK. I would also recommend using Hylomar on the Cometic gasket. Hylomar was originally design for turbine engines and it works really well. Its a little hard to find but worth it in my book.
Where can I find the hylomar spray? Online, or maybe an auto parts store? I don't remember ever seeing that kind of spray at any parts stores?
TECH Addict
Joined: Aug 2005
Posts: 2,305
Likes: 126
From: Monroe,NY
