Cometic MLS HG install. Need to know?!?

[Artago]

Replacing/Installing a cometic mls hg. What do I need to know?

I used a blade to scrape off the block surface to get rid of what looks like carbon build up or some sort of sealer. Also using a scotch brite pad and a little brake cleaner to clean the surface. Is that enough or do I need to do something else.

When installing the HG do I need to put some sort of sealer on the mating surface?

Head has been rebuilt and decked.

 

[Dsmkauai]

You need to have the block and head machined perfectly flat to use a mls and not have it leak! Your better of using a oem composite bro, unless that was done. You can use cooper spray on it! I use it on all the metal gaskets!

 

[Artago]

I snapped a t-belt and had to have the head rebuilt. Head was machined as part of the rebuild.
The block was machined about 30,000 miles ago.
I cleaned up the block surface and installed the head. Should be fine, right?

 

[cjridert1]

Yea man, as long as both surfaces are cleaned real well (sounds like you did), slap them together and go. No need to do the block again (just verify with a quick straight edge). I usually do a round of rubbing alcohol just prior to putting them together. Torque and go.