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Old 05-18-2019, 09:37 AM   #10
J and M Machine
Senior Member
 
Join Date: Oct 2010
Location: 40 Mt.Vickery Rd. Southborough,MA 508-460-0733
Posts: 352
Default Re: Repair of Police (B) Head..

Quote:
Originally Posted by Pete View Post
You said the cracks were in the combustion chamber.
Stitching has a VERY poor chance of working there.
Anywhere else on the head stitching would be ok.
Wow: I guess we'll have to call this customer with Pierce Arrow and tell him to throw the head away we've repaired.
Because stitching doesn't work?

Actually stitching is the best means to repair old cast iron. Example shown of somone trying to braze the crack only made it worse. We in turn cut out damaged area and made pieces fit them and then stitched them back in. This was years ago.
This head was attempted to be repaired and did more damage by adding heat to combustion chamber making areas brittle. Cut out damaged areas made pieces in the combustion chamber and car is still running without water leaks.

Yes We make a living repairing these so I may be slanted in our opinion but in our defense; stitching works and once painted only you know it's there.
Think twice regarding welding.

http://www.jandm-machine.com/metalStitching.html
P8020039.jpg

PA240056.jpg
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