I have a 383 that is cracked in the valley area above the two inside lifter bores.Since it is a water passage is there any epoxy type product that will seal it?I had it welded with no luck.

Thanks,Dave

Sperry Welding in Capac, Michigan, 810-395-4381

He doesn't use nickel based rods. He does it the old fashioned way, like brazing. Excellent work. Good luck.

I would think that if welding didn't do it that epoxy certainly would not but I think it takes as said brazing which brazing cast iron requires the metal to be heated cherry red (to some point). My guy did my completely broken 340 HP ex manifolds that everybody said were useless. Havent used them yet but they look good

I am just looking for an alternative to welding.I thought that in the hi-tech world we live in there could be some product out there that would seal it.I know it isn't likely.

I would just replace the block.

http://www.locknstitch.com/CylinderHeadRepairs.htm

Check out about cast iron welding and alternatives

http://www.locknstitch.com/CylinderHeadRepairs.htm


I went and visited them since they're nearby me.

They do good very work but after my experience, I would get whatever part you need repairing magnafluxed by a very good shop first. Felt pen in any small hard to see cracks up front before giving them the work. They missed one on mine but we caught it later.
Here's a pic of a Hemi block they were planning on repairing.

Don't know who did it or how this head was fixed but it appears to have been welded. Someone did a very nice job on it, didn't even know it was there 'till I had 'em surfaced. I've had them on three different combos so far and not asingle problem.

This stuff might work. Has the same thermal expansion rates as steel. Used it on a 428 with a crack in the valley. Prep work has to be done properly, grind the surface and use acetone or brake clean.
Also works good on intake ports if you get a little greedy...
http://www.devcon.com/products/products.cfm?brandid=1&familyid=101