head info...

[hardtimes]

We use a lot of very old heads on our A/B blocks.
I think that 'sealing' old heads is a proper and important idea to help prevent problems caused by porous corroded metal conditions.

What sealing compounds and methods have you used and/or recommend for old heads ? Would any of the 'tank' sealing compounds likely work for this purpose

[Drive Shaft Dave]

While i have never used these products, Page 97 in Snyder's catalog shows a couple. One is Irontite ceramic motor seal . The other is All weather seal. Repairs leaking head gaskets and cracks in cylinder heads, so it says in the text.

[western77]

I used Barrs stop leak with water glass in it. Has sealed a leak in the intake manifold of a 4.6 liter ford for 5 years now. Just added it to the antifreeze and that's it. JB

[Neil Mylar LakewoodCA]

I have used irontite ceramic motor seal in the past and was happy with it. You use it for a day or 2 and then drain it out.
I bought 2 cans and saved 1 to use later. A year later, when I went to use it, it was solid in the bottle. It is not something that you can save.

[CWPASADENA]

For a very many years, I have used Irontite with very good results. I have ten's of thousand miles on engines with cracks in them where I sealed them with Irontite.

Just be sure to follow the directions.

Irontite is not necessarily the correct repair for a cracked block but when an engine is in service, it often will take care of the problem for a long time.

I have also used Barrs Leak but only for a leak in the radiator.

Most manufacturers even today use a sealer or stop leak solution in the cooling systems of their new cars as a mater of course. Even new castings will occasionally have porosity which will cause a leak if not treated.

Chris W.

My experience.

[hardtimes]

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Originally Posted by CWPASADENA

For a very many years, I have used Irontite with very good results. I have ten's of thousand miles on engines with cracks in them where I sealed them with Irontite.

Just be sure to follow the directions.

Irontite is not necessarily the correct repair for a cracked block but when an engine is in service, it often will take care of the problem for a long time.

I have also used Barrs Leak but only for a leak in the radiator.

Most manufacturers even today use a sealer or stop leak solution in the cooling systems of their new cars as a mater of course. Even new castings will occasionally have porosity which will cause a leak if not treated.

Chris W.

My experience.

Thanks to all, for some very interesting products and experience that you've had with these products. I'm going to look into these. I've read where some 'sealants' can only be installed with the engine HOT.
I like the idea of being able to add to anti-freeze, if necessary.