*84TA

I am putting a set of Vortec heads on a ZZ4 short block. When I set the heads on the block I can get one or the other dowel pin to seat properly the other will not, resulting in the head being up on the block a bit. ( see pictures ) A few light taps with a rubber mallet had the head will seat properly. Is this something to be concerned about? Also the block is slightly used and there is a trace of what looks like copper on the deck from the old gaskets. Could this prevent the new head gaskets from sealing properly?

fast82z

iTrader: (1)

I wouldn't be worried about it since all it takes to get it to set flat is a few light taps with a hammer.

Air_Adam

Its fine. I had to do the same with my old 350 and the current 454 and haven't had any sealing problems.

five7kid

iTrader: (14)

I'd clean up that block deck surface better first, though.

*84TA

Whats the best way to clean the deck surface

Air_Adam

The best way to manually do it, in my experience, is to buy a box of razor blades and alot of brake cleaner. Use the razor blades to scrape/peel everything off the surface, and the brake cleaner to get the surface chemically clean. I've done it this way many times and never had a problem. Just have to be careful not to gouge the surface with the edge of the razor blade. You'll probably use 2 or 3 blades on each deck, because you want a sharp blade because they work better. Don't be chintsy lol.