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1931 Chevy Independence AE - Need Head


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Recently acquired a 1931 Chevy Independence AE, the head is cracked in every single exhaust valve seat area and is currently being worked on.  The Engine rebuilder cut two valve seats for metal inserts, and they machined into the water jacket, the cast head is very thin in that area. So, we are attempting to build up that area via brazing. I believe this will likely not be a successful repair. 
 

I’ve had no success in finding a good used head. Any thoughts or ideas? 96667E97-9002-4A58-97C4-0585C7BE8EA1.jpeg.39c9ba5fdcc008049f9d57b74024f305.jpegCE7EE1BC-CB4A-40D0-9419-FCB418FFA02D.jpeg.6cb9ebe8461dc6ba5ba54fd63e78a309.jpeg

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Never, ever install new valve seats in pre war engines. The only correct repair is to stitch it. Welding and aftermarket seats almost always cause issues……including falling out while driving down the road. A replacement head is the correct solution. 

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Brass in a combustion chamber? And an exhaust port? Yikes. That scares me just looking at it. Good luck on your search for a head. I Imagine you probably already asked on the VCCA forums, but if you didn't, you should. Those guys know where all the parts are. Unfortunately that is a really tough part to get.

 

https://vccachat.org

 

 

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  • 4 months later...

I have a complete running gear for a 1931, the guy I bought everything from was building a street rod out of a show car, what a waste. I can sell the head but how do I make sure it is not cracked ?????  Thanks, Dave

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All - I was able to source a rebuilt 

head from a 1929 engine and it works well. The only difference was the location of the temperature sensor. 

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@viperman — You will need to take your head to an engine shop and have it pressure tested. Some of the cracks can be nested in the valve channels which are not visible when the head is completely assembled. To do it right, you need to do a complete disassemble of the valve components and have the head pressure tested. It cost me roughly $75.00 at a local engine rebuilder. 

 

Edited by Chevy31 (see edit history)
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