Has anyone used Cometic head gaskets and had problems with coolant leaks? I'm using them with a cast block and Indy heads. Thanks

I never had a leak. 50ra finish on the deck & heads. Copper coat all 6 sides of the gaskets & ur good.

Yes have had some issues but a mechanic in a bottle(stop leak)always fixed it.

I know several people that had leak issues, Cometic tells you to install dry, DON'T DO IT!! Like in other responses, copper coat spray all sides, between gaskets, and never a leak, worked for me!

Just also be careful that none of the rivets that hold the cometics together interfere with the block and the heads. I had problems with this with indy heads(572-13 heads) and my megablock. EspeciallyThe bottom rivet(near exhaust ports) .

As already pointed out the proper finish is the key to them sealing dry, with no problems I've done it more than several times in the last four years. No Coppercoat needed if your parts are finish correctly

Thanks for the responses. We had the engine running and it was leaking from the head gaskets. Had installed them with copper coat and no obstructions. Ended up using BG coolant sealer and after a few heat cycles and a long drive, the leak is gone.