filling water jacketed aluminium heads

Does anyone have any experience or know about filling the water jackets on aluminium heads with grout or similar?

 

Blown BBC Conventual Heads-FILLED

I filled a set of Dart 325cc BBC water heads 16 years ago and have run them in a blower motor and never had any trouble with them. We made as much as 46#s of boost and never hurt them and ran 4.04s with them in a dragster and a powerglide. I just thought the extra support in the water jackets would help and it did and the motor is still running and racing today! Jim from TN

 

Investigate a product called Epirez.

 

I didn't see anything about this product and heat. Have you tried it? We currently run water heads on our blown sbc and it sees 40+ lbs of boost. Most of the time we fill the heads with water by using solid copper gaskets that have no water holes to the block. No circulation. So I wouldn't be afraid to run your set up the same way. However we still have trouble with the gasket by those two middle exhaust valves on a sbc. Leakdown shows a lose pretty quick. Don't know if filling the heads would help this.

 

Why don't you try to circulate the water--- at least to get some pressure to force the water to the hot spots ?

 

block filler

Years ago before all the fancy stuff came out we used dental plaster. light weight and never had any problems with it. Looked like a pancake batter.

 

HardBlock Filler for Aluminum Heads and Blocks

I should have mentioned we used the HeadBlock Brand of filler, which is a type of grout with medal powder in it. I have used it in many motors with good success. The trick is to mix it wet enough, so it will run into all of the many hollow spots and holes to make a good support structure-THANKS! Jim

 

Nothing works on a blown SBC i have tried everything on the 2 middle cylinders. I had a -6 line going to the hot spot after 5 runs its back to 20-30% leak down.i never had a gasket blow out in that spot even with 45 lbs of boost. just learned to live with the crappy leak down.as far as filling the heads i woild not do it .I fix a lot of torched heads trying to weld on one that's full of ''stuff'' would be almost imposable.I have welded and plugged all of the water holes in the deck that helps a lot. also alot of cast heads can be re heat treated if needed and that would be hard if they are full of ''stuff''